This study uses polyethylene (PE) with fly ash (FA), another industrial waste, to produce cementitious polymer-based product. PE was incorporated into FA in various mass compositions by hot-pressing under temperatures up to 125 °C and compaction pressures reaching 50 MPa. Their mechanical and chemical properties and morphologies were investigated to establish their applications. Although the heat treatment applied during hot-pressing was lower than the melting temperature of PE (132.6 °C), a sturdy yet lightweight product of 1 PE:2 F A was obtained with 30 MPa of compressive strength, 15 MPa of flexural strength, higher ductility, and a density of only 1453 kg/m3. The crystallinity of the specimens (from 70 % to 90 %) was observed through differential scanning calorimetry. Although direct chemical bonding between PE and FA did not result in, physical interactions due to high compaction pressures, as implied by the robust interlocking of semi-crystalline PE, the micro-spherical shape of FA particles improved the strength.
这项研究利用聚乙烯（PE）和另一种工业废料粉煤灰（FA）来生产水泥基聚合物产品。在温度高达 125 °C、压实压力达到 50 兆帕的条件下，通过热压将聚乙烯掺入不同质量成分的粉煤灰中。研究了它们的机械、化学特性和形态，以确定它们的应用。虽然热压过程中的热处理温度低于聚乙烯的熔化温度（132.6 °C），但仍获得了 1 PE:2 F A 的坚固而轻质的产品，其抗压强度为 30 MPa，抗弯强度为 15 MPa，延展性更高，密度仅为 1453 kg/m3。通过差示扫描量热法观察了试样的结晶度（从 70% 到 90%）。虽然聚乙烯和 FA 之间的直接化学键合不会导致高压实压力下的物理相互作用，但 FA 颗粒的微球形形状提高了强度。
{"title":"Mechanistic characterization of polyethylene by incorporating fly ash","authors":"Ririt Aprilin Sumarsono , Yuya Sakai , Naoki Ogiwara , Sayaka Uchida , Shintaro Nakagawa , Naoko Yoshie","doi":"10.1016/j.compositesb.2024.111864","DOIUrl":"10.1016/j.compositesb.2024.111864","url":null,"abstract":"<div><div>This study uses polyethylene (PE) with fly ash (FA), another industrial waste, to produce cementitious polymer-based product. PE was incorporated into FA in various mass compositions by hot-pressing under temperatures up to 125 °C and compaction pressures reaching 50 MPa. Their mechanical and chemical properties and morphologies were investigated to establish their applications. Although the heat treatment applied during hot-pressing was lower than the melting temperature of PE (132.6 °C), a sturdy yet lightweight product of 1 PE:2 F A was obtained with 30 MPa of compressive strength, 15 MPa of flexural strength, higher ductility, and a density of only 1453 kg/m<sup>3</sup>. The crystallinity of the specimens (from 70 % to 90 %) was observed through differential scanning calorimetry. Although direct chemical bonding between PE and FA did not result in, physical interactions due to high compaction pressures, as implied by the robust interlocking of semi-crystalline PE, the micro-spherical shape of FA particles improved the strength.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111864"},"PeriodicalIF":12.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-26DOI: 10.1016/j.compositesb.2024.111852
Jiaming Liu , Xi Yang , Bowen Dong , Shichao Liu , Yubo Zhang , Guoqun Zhao , Tongmin Wang , Tingju Li
In this study, the optimal carbon fiber/matrix (CF/matrix) interfacial adhesion was explored by tailoring sintering pressures, aiming to enhance the ultimate tensile strength (UTS) of CF/Mg composites. With increasing the pressure, the interfacial shear strength (IFSS) gradually increased from 28.8 MPa to 43.6 MPa. Remarkably enhanced UTS (152 MPa) of the composite was achieved, which was 120.3 % higher than that of the matrix, through optimizing the IFSS to 39.7 MPa. Correspondingly, the main failure mechanism was fiber pulling-out and direct fiber-cutting. Whereas, excessive IFSS (43.6 MPa) deceased the UTS of the composite, with the dominant failure mechanism of direct fiber-cutting.
{"title":"Microstructure evolution and enhanced mechanical properties of CF/Mg composites with optimized fiber/matrix interfacial adhesion","authors":"Jiaming Liu , Xi Yang , Bowen Dong , Shichao Liu , Yubo Zhang , Guoqun Zhao , Tongmin Wang , Tingju Li","doi":"10.1016/j.compositesb.2024.111852","DOIUrl":"10.1016/j.compositesb.2024.111852","url":null,"abstract":"<div><div>In this study, the optimal carbon fiber/matrix (CF/matrix) interfacial adhesion was explored by tailoring sintering pressures, aiming to enhance the ultimate tensile strength (UTS) of CF/Mg composites. With increasing the pressure, the interfacial shear strength (IFSS) gradually increased from 28.8 MPa to 43.6 MPa. Remarkably enhanced UTS (152 MPa) of the composite was achieved, which was 120.3 % higher than that of the matrix, through optimizing the IFSS to 39.7 MPa. Correspondingly, the main failure mechanism was fiber pulling-out and direct fiber-cutting. Whereas, excessive IFSS (43.6 MPa) deceased the UTS of the composite, with the dominant failure mechanism of direct fiber-cutting.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111852"},"PeriodicalIF":12.7,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.compositesb.2024.111859
Jaeyeon Kim , Minsu Kim , Wondu Lee , Jaeho Lee , Jooheon Kim
Recent years have witnessed an accelerated development of electric vehicles (EVs) driven by the pressing need to curb carbon emissions. Lithium-ion batteries (LIBs) stand out as preferred energy storage solutions owing to their high energy density and extended cycle life. Nonetheless, the persistent threat of thermal runaway (TR) remains a critical safety concern. This study endeavors to tackle this issue by introducing a novel composite insulating film tailored to function as a thermal barrier within LIBs. Comprising exfoliated SnSe (tin selenide) and mesoporous silica bonded via Zn ion gelation, the composite showcases a low thermal conductivity of 0.131 W/mK alongside a robust tensile strength of 52.7 MPa. These attributes stem from the distinctive amalgamation of materials and the robust interfacial interactions facilitated by Zn ion gelation, thus enhancing thermal stability and mechanical resilience. The devised DGEBA/SnSe-MSN composite exhibits notable flame retardant properties and superior thermal management capabilities, positioning it as a promising candidate to bolster the safety and dependability of LIBs. This research introduces a promising approach for crafting high-performance insulating films applicable across diverse industries, particularly in the realm of lithium-ion battery technology, leveraging SnSe as an insulating material—a departure from its prior application as a thermoelectric material.
{"title":"<Thermal conductivity of xxx>High-temperature resistant SnSe/MSN film for thermal runaway prevention in lithium-ion batteries","authors":"Jaeyeon Kim , Minsu Kim , Wondu Lee , Jaeho Lee , Jooheon Kim","doi":"10.1016/j.compositesb.2024.111859","DOIUrl":"10.1016/j.compositesb.2024.111859","url":null,"abstract":"<div><div>Recent years have witnessed an accelerated development of electric vehicles (EVs) driven by the pressing need to curb carbon emissions. Lithium-ion batteries (LIBs) stand out as preferred energy storage solutions owing to their high energy density and extended cycle life. Nonetheless, the persistent threat of thermal runaway (TR) remains a critical safety concern. This study endeavors to tackle this issue by introducing a novel composite insulating film tailored to function as a thermal barrier within LIBs. Comprising exfoliated SnSe (tin selenide) and mesoporous silica bonded via Zn ion gelation, the composite showcases a low thermal conductivity of 0.131 W/mK alongside a robust tensile strength of 52.7 MPa. These attributes stem from the distinctive amalgamation of materials and the robust interfacial interactions facilitated by Zn ion gelation, thus enhancing thermal stability and mechanical resilience. The devised DGEBA/SnSe-MSN composite exhibits notable flame retardant properties and superior thermal management capabilities, positioning it as a promising candidate to bolster the safety and dependability of LIBs. This research introduces a promising approach for crafting high-performance insulating films applicable across diverse industries, particularly in the realm of lithium-ion battery technology, leveraging SnSe as an insulating material—a departure from its prior application as a thermoelectric material.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111859"},"PeriodicalIF":12.7,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.compositesb.2024.111862
Jimin Park , Yeonghun Park , Byungjin Choi , Wonchang Choi
High-capacity and high-voltage Li-rich cathode materials are promising candidates for next-generation LIB cathodes due to their high energy density characteristics. However, they face challenges such as electrolyte side reactions at high voltages and slow kinetic properties. To overcome these challenges, this study proposed a one-pot Li2WO4 (LWO) grain boundary coating method. Additionally, a novel synthesis process utilizing zwitterions was introduced to uniformly position heavy tungsten on the surface of a cathode material. Through grain boundary coating, the cathode material was modified not only at the secondary particle level, but also between primary particles by filling grain boundaries with the coating compound. The synthesized LWO grain boundary coated Li-rich cathode exhibited significantly superior rate capability and cycle stability compared to the pristine material. Furthermore, it demonstrated a more stable cycling behavior after high-temperature storage than pristine counterpart. This study presents a primary particle surface modification technique through grain boundary coating and a one-pot synthesis process leveraging zwitterions as a new driving force, providing a new perspective for enhancing the performance of Li-rich cathode materials.
{"title":"Zwitterion assisted in-situ grain boundary coating on Li-rich cathode boosting electrochemical performance in Li-ion batteries","authors":"Jimin Park , Yeonghun Park , Byungjin Choi , Wonchang Choi","doi":"10.1016/j.compositesb.2024.111862","DOIUrl":"10.1016/j.compositesb.2024.111862","url":null,"abstract":"<div><div>High-capacity and high-voltage Li-rich cathode materials are promising candidates for next-generation LIB cathodes due to their high energy density characteristics. However, they face challenges such as electrolyte side reactions at high voltages and slow kinetic properties. To overcome these challenges, this study proposed a one-pot Li<sub>2</sub>WO<sub>4</sub> (LWO) grain boundary coating method. Additionally, a novel synthesis process utilizing zwitterions was introduced to uniformly position heavy tungsten on the surface of a cathode material. Through grain boundary coating, the cathode material was modified not only at the secondary particle level, but also between primary particles by filling grain boundaries with the coating compound. The synthesized LWO grain boundary coated Li-rich cathode exhibited significantly superior rate capability and cycle stability compared to the pristine material. Furthermore, it demonstrated a more stable cycling behavior after high-temperature storage than pristine counterpart. This study presents a primary particle surface modification technique through grain boundary coating and a one-pot synthesis process leveraging zwitterions as a new driving force, providing a new perspective for enhancing the performance of Li-rich cathode materials.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111862"},"PeriodicalIF":12.7,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111850
Zhenlin Tang , Meihuan Gao , Haidi Li , Ziyang Zhang , Xinying Su , Yingge Li , Zhishuang Han , Xinmeng Lv , Jing He , Zaihang Zheng , Yan Liu
Nowadays, steel is one of the most significant materials in industry and daily life. Unfortunately, the defects of steel structures such as collapse at high temperature, poor corrosion resistance, and bad surface functionality have severely restricted their further application. Applying functional coatings for steel structures is considered the effective strategy for settling theses disadvantages. Inspired by nature, eco-friendly, superhydrophobic, and multifunctional-integrated coatings were fabricated on steel via one-step spraying strategy in this paper. Along with silicon dioxide (SiO2) nanoparticles and epoxy resin/silicone resin (EP/SR), the coatings are jointly constituted by hydrophobic flame retardants (M-ALHP@ZIF-8) prepared via multi-stage modification. Due to the formation of micro/nano-scaled rough structure with low surface energy, the water contact angle (WCA) and water sliding angle (WSA) of as-prepared coatings can reach 162.4° ± 1.2° and 2.8° ± 0.4°. The water repellency with low water adhesion can endow the surface of steel with excellent self-cleaning, anti-fouling, and long-lasting anti-corrosion ability. Additionally, the superhydrophobic coatings have displayed good mechanical robustness, chemical stability and weather resistance, which can exhibit certain actual values. Accorded with Zn-catalyzed charring effect of flame retardants, as-prepared coatings have possessed outstanding fire protection capacity with the lowest backside temperature of 181 °C after 1 h fire impact tests. Consequently, this work has provided a facile and effective route for synchronously tackling the key challenges of poor fire protection and surface functionality for steel structures, which will be expected to pave the wide pathway for constructing multifunctional coatings in more fields.
{"title":"Facile and effective construction of superhydrophobic, multi-functional and durable coatings on steel structure","authors":"Zhenlin Tang , Meihuan Gao , Haidi Li , Ziyang Zhang , Xinying Su , Yingge Li , Zhishuang Han , Xinmeng Lv , Jing He , Zaihang Zheng , Yan Liu","doi":"10.1016/j.compositesb.2024.111850","DOIUrl":"10.1016/j.compositesb.2024.111850","url":null,"abstract":"<div><div>Nowadays, steel is one of the most significant materials in industry and daily life. Unfortunately, the defects of steel structures such as collapse at high temperature, poor corrosion resistance, and bad surface functionality have severely restricted their further application. Applying functional coatings for steel structures is considered the effective strategy for settling theses disadvantages. Inspired by nature, eco-friendly, superhydrophobic, and multifunctional-integrated coatings were fabricated on steel via one-step spraying strategy in this paper. Along with silicon dioxide (SiO<sub>2</sub>) nanoparticles and epoxy resin/silicone resin (EP/SR), the coatings are jointly constituted by hydrophobic flame retardants (M-ALHP@ZIF-8) prepared via multi-stage modification. Due to the formation of micro/nano-scaled rough structure with low surface energy, the water contact angle (WCA) and water sliding angle (WSA) of as-prepared coatings can reach 162.4° ± 1.2° and 2.8° ± 0.4°. The water repellency with low water adhesion can endow the surface of steel with excellent self-cleaning, anti-fouling, and long-lasting anti-corrosion ability. Additionally, the superhydrophobic coatings have displayed good mechanical robustness, chemical stability and weather resistance, which can exhibit certain actual values. Accorded with Zn-catalyzed charring effect of flame retardants, as-prepared coatings have possessed outstanding fire protection capacity with the lowest backside temperature of 181 °C after 1 h fire impact tests. Consequently, this work has provided a facile and effective route for synchronously tackling the key challenges of poor fire protection and surface functionality for steel structures, which will be expected to pave the wide pathway for constructing multifunctional coatings in more fields.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111850"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111843
Stefan Carosella, Sebastian Hügle, Florian Helber, Peter Middendorf
Recent advances in Automated Fiber Placement (AFP) and Filament Winding (FM) are driving steady improvements in technological understanding, enabling the production of more precise, cost- and material-efficient layups that pave the way for new applications. Evolving from automated Tape Laying Technology (ATL), AFP is a technology that not only mimics the manual laying process but also allows tailored fiber and tow alignment to deliver load-optimized patterns, stacking sequences and part structures leading to improved mechanical performance and significant waste reduction. The filament winding evolution towards automated Robotic Filament Winding put the technology in a position to manufacture highly complex lightweight structures in architecture. In this short review, recent developments in both automated fiber alignment technologies are presented and discussed, including the main advantages and materials used. Regarding the ATL and AFP process, developments in non-aerospace applications are considered. Besides a short overview of new placement technologies, advances in Tailored Fiber Placement (TFP) in the field of dry fiber placement are reported. Finally, new robotic filament winding applications in free-form and Coreless Filament Winding (CFW) in architecture are presented.
{"title":"A short review on recent advances in automated fiber placement and filament winding technologies","authors":"Stefan Carosella, Sebastian Hügle, Florian Helber, Peter Middendorf","doi":"10.1016/j.compositesb.2024.111843","DOIUrl":"10.1016/j.compositesb.2024.111843","url":null,"abstract":"<div><div>Recent advances in Automated Fiber Placement (AFP) and Filament Winding (FM) are driving steady improvements in technological understanding, enabling the production of more precise, cost- and material-efficient layups that pave the way for new applications. Evolving from automated Tape Laying Technology (ATL), AFP is a technology that not only mimics the manual laying process but also allows tailored fiber and tow alignment to deliver load-optimized patterns, stacking sequences and part structures leading to improved mechanical performance and significant waste reduction. The filament winding evolution towards automated Robotic Filament Winding put the technology in a position to manufacture highly complex lightweight structures in architecture. In this short review, recent developments in both automated fiber alignment technologies are presented and discussed, including the main advantages and materials used. Regarding the ATL and AFP process, developments in non-aerospace applications are considered. Besides a short overview of new placement technologies, advances in Tailored Fiber Placement (TFP) in the field of dry fiber placement are reported. Finally, new robotic filament winding applications in free-form and Coreless Filament Winding (CFW) in architecture are presented.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111843"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111858
Thomas W. Loh, Hoang T. Nguyen, Kate T.Q. Nguyen
Load-bearing fibre reinforced polymer laminates soften and decompose when exposed to high temperature fire which may cause significant deformation and weakening, ultimately leading to failure. A combined experimental and modelling study is presented to predict the fire structural survivability of laminates using artificial neural networks based on machine learning. Multiple experimental fire-under-tension load tests are performed under identical conditions to determine the average values and scatter to the surface temperatures, deformation rates and rupture times for an E-glass/vinyl ester laminate. A data-driven modelling strategy based on artificial neural networks is presented that can predict the temperatures and fire structural properties for the laminate when subject to combined fire exposure and tension loading. It is shown that the model gives excellent agreement to the measured surface temperatures, deformations, and time-to-failure of the laminate when exposed to one-sided heating at a constant heat flux. It is envisioned that the ANN based model could be used to assess the fire structural survivability of load-bearing composite structures exposed to fire.
承重纤维增强聚合物层压板在暴露于高温火灾时会软化和分解，从而导致明显的变形和削弱，最终导致失效。本文介绍了一项实验与建模相结合的研究，利用基于机器学习的人工神经网络来预测层压板的火灾结构存活能力。在完全相同的条件下进行了多次拉伸荷载试验，以确定 E 玻璃/乙烯基酯层压板的表面温度、变形率和断裂时间的平均值和散点。介绍了一种基于人工神经网络的数据驱动建模策略，该策略可以预测层压板在火灾暴露和拉伸荷载作用下的温度和防火结构特性。结果表明，该模型与在恒定热通量下单面加热时测量到的层压板表面温度、变形和失效时间非常吻合。预计基于 ANN 的模型可用于评估承重复合材料结构在火灾中的生存能力。
{"title":"Prediction of temperature and structural properties of fibre-reinforced polymer laminates under simulated fire exposure using artificial neural networks","authors":"Thomas W. Loh, Hoang T. Nguyen, Kate T.Q. Nguyen","doi":"10.1016/j.compositesb.2024.111858","DOIUrl":"10.1016/j.compositesb.2024.111858","url":null,"abstract":"<div><div>Load-bearing fibre reinforced polymer laminates soften and decompose when exposed to high temperature fire which may cause significant deformation and weakening, ultimately leading to failure. A combined experimental and modelling study is presented to predict the fire structural survivability of laminates using artificial neural networks based on machine learning. Multiple experimental fire-under-tension load tests are performed under identical conditions to determine the average values and scatter to the surface temperatures, deformation rates and rupture times for an E-glass/vinyl ester laminate. A data-driven modelling strategy based on artificial neural networks is presented that can predict the temperatures and fire structural properties for the laminate when subject to combined fire exposure and tension loading. It is shown that the model gives excellent agreement to the measured surface temperatures, deformations, and time-to-failure of the laminate when exposed to one-sided heating at a constant heat flux. It is envisioned that the ANN based model could be used to assess the fire structural survivability of load-bearing composite structures exposed to fire.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111858"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111851
Hang Zou , Rui Hu , Mi Zhou , Zitong Gao , Xinxin Liu , Xian Luo
TiAl alloys with low density, high creep resistance and high temperature performance are considered as candidate materials to replace nickel-based superalloys in the range of 700∼800 °C. However, the intrinsic brittleness of TiAl alloys has always been the biggest bottleneck restricting their development. In this paper, a bioinspired interpenetrating Ti2AlNb/TiAl composite with crossed-lamellar structure was prepared by combining selective laser melting (SLM) and vacuum hot press sintering (HPS) under the condition of 1150 °C/1 h/45 MPa, to improve the strength and toughness of the composite. Meanwhile, the metallurgical defects and microstructure of Ti2AlNb reinforcement skeleton printed under different volume energy densities (VEDs) were investigated, as well as the evolution of the microstructure at the interface region of the composite was systematically studied. What's more, we studied the mechanical properties of the composite including nanoindentation test, room temperature tensile and bending tests. The results show that the VED is 88.89 J/mm3, an almost completely dense reinforcement skeleton (∼99.8 %) is obtained. The interface region can be divided into four different reaction layers, namely LⅠ, LⅡ, LⅢ and LⅣ, due to the diffusion of elements. LⅠ is mainly composed of Othick/thin lath-like phase and O short rod-like phase. LⅡ is mainly composed of B2/β phase, acicular α2 phase and nanoscale ω-Ti3NbAl2 phase. The LⅢ mainly consists of B2/β phase. The LⅣ is composed of α2 phase. The deformability of each phase in the composite: B2/β phase > O phase >γ phase >α2 phase >ω phase. The tensile strength and fracture toughness of bioinspired interpenetrating Ti2AlNb/TiAl matrix composite are increased by 24.0 % and 89.0 %, respectively, compared with TiAl alloy, which is mainly contributed to the strong interfacial bonding between matrix and reinforcement as well as the synergistic effect of Ti2AlNb reinforcement with high strength and toughness.
{"title":"Microstructure evolution and mechanical properties of bioinspired interpenetrating Ti2AlNb/TiAl matrix composite with a crossed-lamellar structure","authors":"Hang Zou , Rui Hu , Mi Zhou , Zitong Gao , Xinxin Liu , Xian Luo","doi":"10.1016/j.compositesb.2024.111851","DOIUrl":"10.1016/j.compositesb.2024.111851","url":null,"abstract":"<div><div>TiAl alloys with low density, high creep resistance and high temperature performance are considered as candidate materials to replace nickel-based superalloys in the range of 700∼800 °C. However, the intrinsic brittleness of TiAl alloys has always been the biggest bottleneck restricting their development. In this paper, a bioinspired interpenetrating Ti<sub>2</sub>AlNb/TiAl composite with crossed-lamellar structure was prepared by combining selective laser melting (SLM) and vacuum hot press sintering (HPS) under the condition of 1150 °C/1 h/45 MPa, to improve the strength and toughness of the composite. Meanwhile, the metallurgical defects and microstructure of Ti<sub>2</sub>AlNb reinforcement skeleton printed under different volume energy densities (<em>VEDs</em>) were investigated, as well as the evolution of the microstructure at the interface region of the composite was systematically studied. What's more, we studied the mechanical properties of the composite including nanoindentation test, room temperature tensile and bending tests. The results show that the <em>VED</em> is 88.89 J/mm<sup>3</sup>, an almost completely dense reinforcement skeleton (∼99.8 %) is obtained. The interface region can be divided into four different reaction layers, namely L<sub>Ⅰ</sub>, L<sub>Ⅱ</sub>, L<sub>Ⅲ</sub> and L<sub>Ⅳ</sub>, due to the diffusion of elements. L<sub>Ⅰ</sub> is mainly composed of O<sub>thick/thin lath-like</sub> phase and O <sub>short rod-like</sub> phase. L<sub>Ⅱ</sub> is mainly composed of B<sub>2</sub>/β phase, acicular α<sub>2</sub> phase and nanoscale ω-Ti<sub>3</sub>NbAl<sub>2</sub> phase. The L<sub>Ⅲ</sub> mainly consists of B<sub>2</sub>/β phase. The L<sub>Ⅳ</sub> is composed of α<sub>2</sub> phase. The deformability of each phase in the composite: B<sub>2</sub>/β phase > O phase >γ phase >α<sub>2</sub> phase >ω phase. The tensile strength and fracture toughness of bioinspired interpenetrating Ti<sub>2</sub>AlNb/TiAl matrix composite are increased by 24.0 % and 89.0 %, respectively, compared with TiAl alloy, which is mainly contributed to the strong interfacial bonding between matrix and reinforcement as well as the synergistic effect of Ti<sub>2</sub>AlNb reinforcement with high strength and toughness.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111851"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111845
Rui Shu , Yiran Mao , Alvaro Martinez-Pechero , Jan W. Coenen , Alexis Terra , Stephan Schönen , Johann Riesch , Christian Linsmeier , Christoph Broeckmann
Tungsten (W) is a promising candidate material for the plasma facing components in fusion reactors. However, it has issues regarding the intrinsic brittleness. Tungsten fiber reinforced tungsten composites (Wf/W) have been developed based on the concept of extrinsic toughening mechanisms and they show a pseudo-ductile behavior during the fracture process. In the present work, continuous fiber reinforced Wf/Y2O3/W composites were fabricated via a powder metallurgy (PM) process, and the microstructure and mechanical properties were characterized. The fracture behavior and toughening mechanisms were analyzed in detail combining the results of experiments and numerical simulation. The Wf/Y2O3/W composites is toughened by multiple mechanisms such as fiber bridging, crack bending and deflection, interface de-bonding and plastic deformation of fiber. The energy dissipation by interface de-bonding can be neglected. However, it is a necessary factor to ensure any extrinsic toughening mechanisms. The main contribution of the energy dissipation while composite failure is the plastic deformation of fibers.
{"title":"Study on the fracture behavior and toughening mechanisms of continuous fiber reinforced Wf/Y2O3/W composites fabricated via powder metallurgy","authors":"Rui Shu , Yiran Mao , Alvaro Martinez-Pechero , Jan W. Coenen , Alexis Terra , Stephan Schönen , Johann Riesch , Christian Linsmeier , Christoph Broeckmann","doi":"10.1016/j.compositesb.2024.111845","DOIUrl":"10.1016/j.compositesb.2024.111845","url":null,"abstract":"<div><div>Tungsten (W) is a promising candidate material for the plasma facing components in fusion reactors. However, it has issues regarding the intrinsic brittleness. Tungsten fiber reinforced tungsten composites (W<sub>f</sub>/W) have been developed based on the concept of extrinsic toughening mechanisms and they show a pseudo-ductile behavior during the fracture process. In the present work, continuous fiber reinforced W<sub>f</sub>/Y<sub>2</sub>O<sub>3</sub>/W composites were fabricated via a powder metallurgy (PM) process, and the microstructure and mechanical properties were characterized. The fracture behavior and toughening mechanisms were analyzed in detail combining the results of experiments and numerical simulation. The W<sub>f</sub>/Y<sub>2</sub>O<sub>3</sub>/W composites is toughened by multiple mechanisms such as fiber bridging, crack bending and deflection, interface de-bonding and plastic deformation of fiber. The energy dissipation by interface de-bonding can be neglected. However, it is a necessary factor to ensure any extrinsic toughening mechanisms. The main contribution of the energy dissipation while composite failure is the plastic deformation of fibers.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111845"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1359836824006577/pdfft?md5=2c437c6431bc6856cebc38167eec6a30&pid=1-s2.0-S1359836824006577-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.compositesb.2024.111860
Xuyang Wu , Wei Yuan , Xiaoqing Zhang , Qing Liu , Chun Wang , Lanchen Xue , Chun Li , Tengjia Gao , Simin Jiang , Bote Zhao , Yu Chen , Tingting Yu , Yong Tang
"Tip effect" triggered by uneven zinc deposition accelerates the growth of Zn dendrites. The unfavorable interfacial activity gradient aggravates zinc deposition at the tips, which is the root cause of zinc dendrites. This study reports an interfacial local activation strategy to reconfigure the interfacial activity gradient of zinc anode to promote more stable operation of zinc batteries. A locally activated zinc anode (Zn-ILA) is proposed as the proof-of-concept zinc anode by constructing high-active microchannels to induce preferential zinc deposition, while the remaining low-active region is accompanied by zinc epitaxial growth, thus achieving bottom-up zinc deposition at the anode interface. A fabrication method based on nanosecond pulsed laser is used to modify the zinc anode by creating high-active microchannels through thermal impingement. Additionally, low-active regions covered by dense ZnO nanoparticles are also formed due to the plasma effect. The laser-induced cross-scale oxide layers help improve the corrosion resistance at the full zinc anode interface. The proposed interfacial local activation strategy enables ordered selective deposition at the Zn-ILA interface owing to the activity gradient, as well as stabilizes the long-term operation of symmetric and full cells. The effectiveness of Zn-ILA is also validated in large-area pouch batteries, showing great potential for large-scale energy storage systems.
{"title":"Interfacial local activation strategy tailoring selective zinc deposition pattern for stable zinc anodes","authors":"Xuyang Wu , Wei Yuan , Xiaoqing Zhang , Qing Liu , Chun Wang , Lanchen Xue , Chun Li , Tengjia Gao , Simin Jiang , Bote Zhao , Yu Chen , Tingting Yu , Yong Tang","doi":"10.1016/j.compositesb.2024.111860","DOIUrl":"10.1016/j.compositesb.2024.111860","url":null,"abstract":"<div><div>\"Tip effect\" triggered by uneven zinc deposition accelerates the growth of Zn dendrites. The unfavorable interfacial activity gradient aggravates zinc deposition at the tips, which is the root cause of zinc dendrites. This study reports an interfacial local activation strategy to reconfigure the interfacial activity gradient of zinc anode to promote more stable operation of zinc batteries. A locally activated zinc anode (Zn-ILA) is proposed as the proof-of-concept zinc anode by constructing high-active microchannels to induce preferential zinc deposition, while the remaining low-active region is accompanied by zinc epitaxial growth, thus achieving bottom-up zinc deposition at the anode interface. A fabrication method based on nanosecond pulsed laser is used to modify the zinc anode by creating high-active microchannels through thermal impingement. Additionally, low-active regions covered by dense ZnO nanoparticles are also formed due to the plasma effect. The laser-induced cross-scale oxide layers help improve the corrosion resistance at the full zinc anode interface. The proposed interfacial local activation strategy enables ordered selective deposition at the Zn-ILA interface owing to the activity gradient, as well as stabilizes the long-term operation of symmetric and full cells. The effectiveness of Zn-ILA is also validated in large-area pouch batteries, showing great potential for large-scale energy storage systems.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"287 ","pages":"Article 111860"},"PeriodicalIF":12.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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