Progress in Natural Science: Materials International最新文献

英文中文

Dynamic response study of air-cooled proton exchange membrane fuel cell stack

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.11.006

Houchang Pei , Zhangda Liu , Jibing Chen , Liangbo Sun , Beihai Wang , Lu Xing , Shanshan Cai , Zhengkai Tu

The dynamic response is a critical performance indicator of air-cooled fuel cells, directly affecting their operation's stability and reliability. This paper experimentally investigated the impact of different operating conditions on the dynamic response characteristics of the air-cooled proton exchange membrane fuel cell (PEMFC) stack. The overvoltage of fuel cells at higher ambient temperatures is smaller after loading, and it takes a shorter time for fuel cells to recover to a stable level. Different air supply modes were investigated, results show that increasing the cathode gas flow rate helps reduce the overshoot voltage of the air-cooled PEMFC stack. A higher cathode flow rate enhances the oxygen concentration at the catalyst layer, helping to supplement the local gas shortage. In addition, as the gas pressure inside the stack is slightly lower than the ambient pressure when the air-cooled PEMFC operates with the exhaust mode, the overshoot voltage of the exhaust air supply mode is 15.8 % higher than that of the blow airflow mode under the same air fan speed (4500r/min). Increasing the load change rate leads to insufficient local gas supply without enough time to replenish, causing the cell's overshoot voltage to rise; the more significant the load change rate, the greater the cell's overshoot voltage. Reducing the anode pulse purging interval can reduce the cell output voltage fluctuation with limited effect.

{"title":"Dynamic response study of air-cooled proton exchange membrane fuel cell stack","authors":"Houchang Pei , Zhangda Liu , Jibing Chen , Liangbo Sun , Beihai Wang , Lu Xing , Shanshan Cai , Zhengkai Tu","doi":"10.1016/j.pnsc.2024.11.006","DOIUrl":"10.1016/j.pnsc.2024.11.006","url":null,"abstract":"<div><div>The dynamic response is a critical performance indicator of air-cooled fuel cells, directly affecting their operation's stability and reliability. This paper experimentally investigated the impact of different operating conditions on the dynamic response characteristics of the air-cooled proton exchange membrane fuel cell (PEMFC) stack. The overvoltage of fuel cells at higher ambient temperatures is smaller after loading, and it takes a shorter time for fuel cells to recover to a stable level. Different air supply modes were investigated, results show that increasing the cathode gas flow rate helps reduce the overshoot voltage of the air-cooled PEMFC stack. A higher cathode flow rate enhances the oxygen concentration at the catalyst layer, helping to supplement the local gas shortage. In addition, as the gas pressure inside the stack is slightly lower than the ambient pressure when the air-cooled PEMFC operates with the exhaust mode, the overshoot voltage of the exhaust air supply mode is 15.8 % higher than that of the blow airflow mode under the same air fan speed (4500r/min). Increasing the load change rate leads to insufficient local gas supply without enough time to replenish, causing the cell's overshoot voltage to rise; the more significant the load change rate, the greater the cell's overshoot voltage. Reducing the anode pulse purging interval can reduce the cell output voltage fluctuation with limited effect.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1318-1326"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143339003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural evolution and properties of the Cu-Cr-Ti alloys after cold deformation and subsequent aging treatment

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.10.006

Xueqin Dai , Shuguo Jia , Yanjun Zhou , Yingxuan Ma , Zhenpeng Xiao , Huiwen Guo , Xiao Cao , Yuduo Fu , Kexing Song , Zongye Ding

The increasingly desirable mechanical and physical properties limits the application of traditional Cu-Cr alloys, and deserves the compositional design and processing optimization of Cu-Cr-Ti alloys. The effects of cold deformation and aging treatment on the microstructures and properties of the Cu-0.2Cr-0.08Ti alloys were investigated. The shapes of precipitates and evolution of dislocations in the specimens with increasing deformation amounts and aging times was uncovered, and the strengthening mechanisms of Cu-Cr-Ti alloys were elucidated by using TEM and HRTEM analysis. When the deformation amount is not higher than 40 %, the increased deformation amounts increases the dislocation density in the Cu-0.2Cr-0.08Ti alloy, promoting the formation of dislocation cell and dislocation tangles with small size. The precipitation of fine Cr particles coherent with Cu matrix is accelerated, accompanied by the enhancement of microhardness and electrical conductivity. The Cu-0.2Cr-0.08Ti alloy with 40 % deformation amounts after aging at 480 °C for 1 h has the optimal comprehensive properties, which is related to the increasing dislocation density, the refinement of Cu grains and the precipitation of Cr particles. The enhanced strength of Cu-0.2Cr-0.08Ti alloy with 40 % deformation amounts after aging at 480 °C for 1 h is attributed to the solute strengthening of solute atoms, precipitate strengthening of fine Cr particles, dislocations strengthening and grain boundary strengthening mechanisms.

{"title":"Microstructural evolution and properties of the Cu-Cr-Ti alloys after cold deformation and subsequent aging treatment","authors":"Xueqin Dai , Shuguo Jia , Yanjun Zhou , Yingxuan Ma , Zhenpeng Xiao , Huiwen Guo , Xiao Cao , Yuduo Fu , Kexing Song , Zongye Ding","doi":"10.1016/j.pnsc.2024.10.006","DOIUrl":"10.1016/j.pnsc.2024.10.006","url":null,"abstract":"<div><div>The increasingly desirable mechanical and physical properties limits the application of traditional Cu-Cr alloys, and deserves the compositional design and processing optimization of Cu-Cr-Ti alloys. The effects of cold deformation and aging treatment on the microstructures and properties of the Cu-0.2Cr-0.08Ti alloys were investigated. The shapes of precipitates and evolution of dislocations in the specimens with increasing deformation amounts and aging times was uncovered, and the strengthening mechanisms of Cu-Cr-Ti alloys were elucidated by using TEM and HRTEM analysis. When the deformation amount is not higher than 40 %, the increased deformation amounts increases the dislocation density in the Cu-0.2Cr-0.08Ti alloy, promoting the formation of dislocation cell and dislocation tangles with small size. The precipitation of fine Cr particles coherent with Cu matrix is accelerated, accompanied by the enhancement of microhardness and electrical conductivity. The Cu-0.2Cr-0.08Ti alloy with 40 % deformation amounts after aging at 480 °C for 1 h has the optimal comprehensive properties, which is related to the increasing dislocation density, the refinement of Cu grains and the precipitation of Cr particles. The enhanced strength of Cu-0.2Cr-0.08Ti alloy with 40 % deformation amounts after aging at 480 °C for 1 h is attributed to the solute strengthening of solute atoms, precipitate strengthening of fine Cr particles, dislocations strengthening and grain boundary strengthening mechanisms.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1258-1266"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143360240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High performance soft fiber-reinforced sodium alginate/polyacrylamide double-network hydrogels

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.10.007

Xiaodan Wang , Dan Xie , Wenwen Hou, Lilong Gao, Yanzhi Xia, Kunyan Sui

Strong and stretchable hydrogels are in great demand but challenging due to the trade-off between the strength and stretchability. Here, we successfully prepared highly strong and stretchable sodium alginate/polyacrylamide (SA/PAM) double network (DN) hydrogels by using swollen calcium alginate fiber (CAF) as the first energy dissipating network. The swollen fibers contributed two functions: the homogeneous SA ionic crosslinked-polymer networks and the soft fiber reinforcement. In contrast to the stiff fiber, the soft CAF provide more effective energy dissipation transferring from soft fiber to the liquid hydrogel. The as-prepared hydrogels demonstrated a high tensile strength (0.83 MPa), high stretchability (4230 %), and high toughness (15.7 MJ/m³), as 5, 3 and 14 times of the SA/PAM hydrogels. This soft fiber-reinforced strategy offers a new way for preparing high-performance hydrogels, broadening their applications areas.

引用次数: 0

Co-MOF-derived stalk-flower like NiCo-LDH homostructure towards boosting electrochemical energy storage

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.10.004

Panpan Li , Xiaoliang Wang , Shaobin Yang , Jian Qi

The rational design of the heterostructure of multi-component materials acts on electrochemical properties. However, the effect of structure and component alone on the performance is ignored. Homostructure can reflect the advantages of structural design more directly and fully tap the potential of the material itself. Herein, the homogeneous stereostructure with NiCo-LDH nanostalks (NiCo-LDH_S) and NiCo-LDH nanoflowers (NiCo-LDH_F) was synthesized through simultaneous Co-MOF in-situ etch and electrodeposition. NiCo-LDH_S not only preserves the shape of MOF rods, but also forms a firm adhesion to nickel foam. The coated NiCo-LDH_F on NiCo-LDH_S increases the loading of pseudocapacity material. As a result of the high capacity of Ni(OH)₂, the high conductivity of Co(OH)₂, as well as the stalk-flower stereostructure, the NiCo-LDH_S-F electrode demonstrates a specific capacity of 2058 F g⁻¹ (13994 mF cm⁻²) at 1 A g⁻¹, along with an ultrahigh rate capability, retaining 73.9 % of its capacity at 20 A g⁻¹. Moreover, the assembled NiCo-LDH_S-F//AC hybrid supercapacitor (HSC) exhibits striking energy and power densities of 48.44 Wh·kg⁻¹ (0.78 mWh·cm⁻²) and 800 W kg⁻¹ (12.8 mW cm⁻²), respectively. Notably, after 10,000 consecutive charging and discharging cycles, the device maintains a capacity retention of 85.36 %, demonstrating its good cycling stability. These findings prove the essentiality of designing homogeneous structure for the advancement of energy storage performance.

{"title":"Co-MOF-derived stalk-flower like NiCo-LDH homostructure towards boosting electrochemical energy storage","authors":"Panpan Li , Xiaoliang Wang , Shaobin Yang , Jian Qi","doi":"10.1016/j.pnsc.2024.10.004","DOIUrl":"10.1016/j.pnsc.2024.10.004","url":null,"abstract":"<div><div>The rational design of the heterostructure of multi-component materials acts on electrochemical properties. However, the effect of structure and component alone on the performance is ignored. Homostructure can reflect the advantages of structural design more directly and fully tap the potential of the material itself. Herein, the homogeneous stereostructure with NiCo-LDH nanostalks (NiCo-LDH<sub>S</sub>) and NiCo-LDH nanoflowers (NiCo-LDH<sub>F</sub>) was synthesized through simultaneous Co-MOF in-situ etch and electrodeposition. NiCo-LDH<sub>S</sub> not only preserves the shape of MOF rods, but also forms a firm adhesion to nickel foam. The coated NiCo-LDH<sub>F</sub> on NiCo-LDH<sub>S</sub> increases the loading of pseudocapacity material. As a result of the high capacity of Ni(OH)<sub>2</sub>, the high conductivity of Co(OH)<sub>2</sub>, as well as the stalk-flower stereostructure, the NiCo-LDH<sub>S-F</sub> electrode demonstrates a specific capacity of 2058 F g<sup>−1</sup> (13994 mF cm<sup>−2</sup>) at 1 A g<sup>−1</sup>, along with an ultrahigh rate capability, retaining 73.9 % of its capacity at 20 A g<sup>−1</sup>. Moreover, the assembled NiCo-LDH<sub>S-F</sub>//AC hybrid supercapacitor (HSC) exhibits striking energy and power densities of 48.44 Wh·kg<sup>−1</sup> (0.78 mWh·cm<sup>−2</sup>) and 800 W kg<sup>−1</sup> (12.8 mW cm<sup>−2</sup>), respectively. Notably, after 10,000 consecutive charging and discharging cycles, the device maintains a capacity retention of 85.36 %, demonstrating its good cycling stability. These findings prove the essentiality of designing homogeneous structure for the advancement of energy storage performance.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1236-1248"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143339005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation mechanism and removal strategy of residual lithium compounds on nickel-rich cathode materials

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.08.010

Qianqiu Tian , Renhong Song , Jiaxiu Zhang , Yichang Chen , Chunyu Cui , Cheng Ma , Mingru Su , Wenbin Hu

Lithium-ion batteries employ Ni-rich layered oxides as cathodes because they have a high specific capacity and are relatively inexpensive. Despite this, materials have poor air storage stability because of their high sensitivity to air, and it is easy for lithium compounds to accumulate on their surfaces. As a result, surface residual lithium compounds Ni-rich cathode materials will reduce their comprehensive properties, complicate the subsequent electrode manufacturing process, and severely limit their practical application. Hence, the study of surface removal of residual lithium compounds has great practical significance. A summary of the sources of surface residual lithium compounds of Ni-rich cathode materials is presented hereof, along with an evaluation of the adverse effects those compounds have on materials, and an analysis of feasible solutions to reduce or eliminate these compounds. Finally, a future research direction is discussed for eliminating residual lithium compounds.

{"title":"Formation mechanism and removal strategy of residual lithium compounds on nickel-rich cathode materials","authors":"Qianqiu Tian , Renhong Song , Jiaxiu Zhang , Yichang Chen , Chunyu Cui , Cheng Ma , Mingru Su , Wenbin Hu","doi":"10.1016/j.pnsc.2024.08.010","DOIUrl":"10.1016/j.pnsc.2024.08.010","url":null,"abstract":"<div><div>Lithium-ion batteries employ Ni-rich layered oxides as cathodes because they have a high specific capacity and are relatively inexpensive. Despite this, materials have poor air storage stability because of their high sensitivity to air, and it is easy for lithium compounds to accumulate on their surfaces. As a result, surface residual lithium compounds Ni-rich cathode materials will reduce their comprehensive properties, complicate the subsequent electrode manufacturing process, and severely limit their practical application. Hence, the study of surface removal of residual lithium compounds has great practical significance. A summary of the sources of surface residual lithium compounds of Ni-rich cathode materials is presented hereof, along with an evaluation of the adverse effects those compounds have on materials, and an analysis of feasible solutions to reduce or eliminate these compounds. Finally, a future research direction is discussed for eliminating residual lithium compounds.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1158-1166"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143360211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metamaterials made from Ni-based amorphous alloy micro-nanolattices with high mechanical and electrochemical performance

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.11.011

Wentao Zhang, Zhongzheng Yao, Changsheng Guo, Huiqiang Ying, He Zhu, Si Lan

Amorphous alloys, i.e., metallic glasses, combine high strength, hardness, excellent wear and corrosion resistance, and unique thermoplasticity due to their short-range ordered but long-range disordered glassy structures. However, critical size constraints limit their applications in advanced fields such as electrocatalysis, sensing, and complex devices. Here we report a novel lattice metamaterial fabricated by conformally depositing NiNbSn amorphous alloy coatings onto three-dimensional (3D)-printed polymer scaffolds with a cubic micro-nano lattice template. The cubic lattice design enables efficient stress transfer and uniform strain energy distribution, minimizing stress concentration. Meanwhile, the NiNbSn coating, featuring amorphous and nanocrystalline components, further enhances the structure through size hardening. The resulting hybrid polymer/alloy lattice shows excellent mechanical properties and an exceptional energy absorption capacity. Furthermore, coating the hybrid lattice with a NiMoPB glassy film results in a 3D nano-micro electrode for glucose detection, achieving a sensitivity of 13 times higher than that of the cast-counterpart. Our strategy opens a new path to fabricating hybrid polymer/MGs micro-nano lattice structures with excellent mechanical and electrochemical performance, broadening the potential applications of metamaterials.

{"title":"Metamaterials made from Ni-based amorphous alloy micro-nanolattices with high mechanical and electrochemical performance","authors":"Wentao Zhang, Zhongzheng Yao, Changsheng Guo, Huiqiang Ying, He Zhu, Si Lan","doi":"10.1016/j.pnsc.2024.11.011","DOIUrl":"10.1016/j.pnsc.2024.11.011","url":null,"abstract":"<div><div>Amorphous alloys, i.e., metallic glasses, combine high strength, hardness, excellent wear and corrosion resistance, and unique thermoplasticity due to their short-range ordered but long-range disordered glassy structures. However, critical size constraints limit their applications in advanced fields such as electrocatalysis, sensing, and complex devices. Here we report a novel lattice metamaterial fabricated by conformally depositing NiNbSn amorphous alloy coatings onto three-dimensional (3D)-printed polymer scaffolds with a cubic micro-nano lattice template. The cubic lattice design enables efficient stress transfer and uniform strain energy distribution, minimizing stress concentration. Meanwhile, the NiNbSn coating, featuring amorphous and nanocrystalline components, further enhances the structure through size hardening. The resulting hybrid polymer/alloy lattice shows excellent mechanical properties and an exceptional energy absorption capacity. Furthermore, coating the hybrid lattice with a NiMoPB glassy film results in a 3D nano-micro electrode for glucose detection, achieving a sensitivity of 13 times higher than that of the cast-counterpart. Our strategy opens a new path to fabricating hybrid polymer/MGs micro-nano lattice structures with excellent mechanical and electrochemical performance, broadening the potential applications of metamaterials.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1327-1332"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143360291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New strategy for enhancing the strength and toughness of Ti-Al metallic-intermetallic laminated composites: Constructing multiple heterostructures using Ni foil

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.08.007

Pengfei Zhou , Meini Yuan , Mengye Jia , Xin Pei , Yang Wang , Wei Yang , Honglin Wang , Yuhong Zhao

In order to simultaneously improve the strength and ductility of Ti-Al metallic-intermetallic laminated (TA-MIL) composites, novel Ti-Al-Ni ternary MIL (TAN-TMIL) composites with multiple heterostructures (HS) were fabricated by adding a 0.02 mm Ni foil behind the Ti and Al foils. The results showed that TAN-600 consisted of the same phases (Ti, Al₃Ti, and Al) as TA-600 and additionally produced new NiAl₃ and Ni₂Al₃ phases due to the Ni-Al reactions. Furthermore, when the hot-pressing temperature was increased to 650 °C, Kirkendall voids appeared in the Al₃Ti layer (TA-650) and at the Al₃Ti/NiAl₃ interface (TAN-650). Compared to TA-MIL composites, the thickness of the Al₃Ti layer in the TAN-TMIL composites increased by four times when prepared at 600 °C, but decreased by four times when prepared at 650 °C. Electron backscatter diffraction (EBSD) and nano-indentation tests revealed that TAN-600 had multiple HS and more high-angle grain boundaries (HAGB), optimizing the structure of TA-600. Importantly, this structural arrangement enhanced the interface effects and compressive properties of TAN-600. Tensile testing indicated that the crack-free NiAl₃/Ni₂Al₃ layer contributed to the strength of TAN-600, ensuring multi-directional fracture in the Al₃Ti layer. This research provides insights for improving the strength and toughness of TA-MIL composites.

{"title":"New strategy for enhancing the strength and toughness of Ti-Al metallic-intermetallic laminated composites: Constructing multiple heterostructures using Ni foil","authors":"Pengfei Zhou , Meini Yuan , Mengye Jia , Xin Pei , Yang Wang , Wei Yang , Honglin Wang , Yuhong Zhao","doi":"10.1016/j.pnsc.2024.08.007","DOIUrl":"10.1016/j.pnsc.2024.08.007","url":null,"abstract":"<div><div>In order to simultaneously improve the strength and ductility of Ti-Al metallic-intermetallic laminated (TA-MIL) composites, novel Ti-Al-Ni ternary MIL (TAN-TMIL) composites with multiple heterostructures (HS) were fabricated by adding a 0.02 mm Ni foil behind the Ti and Al foils. The results showed that TAN-600 consisted of the same phases (Ti, Al<sub>3</sub>Ti, and Al) as TA-600 and additionally produced new NiAl<sub>3</sub> and Ni<sub>2</sub>Al<sub>3</sub> phases due to the Ni-Al reactions. Furthermore, when the hot-pressing temperature was increased to 650 °C, Kirkendall voids appeared in the Al<sub>3</sub>Ti layer (TA-650) and at the Al<sub>3</sub>Ti/NiAl<sub>3</sub> interface (TAN-650). Compared to TA-MIL composites, the thickness of the Al<sub>3</sub>Ti layer in the TAN-TMIL composites increased by four times when prepared at 600 °C, but decreased by four times when prepared at 650 °C. Electron backscatter diffraction (EBSD) and nano-indentation tests revealed that TAN-600 had multiple HS and more high-angle grain boundaries (HAGB), optimizing the structure of TA-600. Importantly, this structural arrangement enhanced the interface effects and compressive properties of TAN-600. Tensile testing indicated that the crack-free NiAl<sub>3</sub>/Ni<sub>2</sub>Al<sub>3</sub> layer contributed to the strength of TAN-600, ensuring multi-directional fracture in the Al<sub>3</sub>Ti layer. This research provides insights for improving the strength and toughness of TA-MIL composites.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 6","pages":"Pages 1173-1183"},"PeriodicalIF":4.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143360244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strategies for molecular construction and performance regulation of heat-resistant energetic materials: An overview

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.09.008

Jing Zhang , Bojun Tan , Qian Zhang , Shaoli Chen , Yongxing Tang , Ning Liu

With the rapid development of deep-well blasting, aerospace and other fields, heat-resistant energetic materials have attracted wide attention of scientists all over the world. In this paper, the latest research progress of heat-resistant energetic materials based on benzene ring, bridged nitrogen heterocyclic ring, coupled nitrogen heterocyclic ring, fused nitrogen heterocyclic ring, molecular perovskite and energetic metal-organic framework is reviewed. The review delves into the synthetic routes, physical and chemical properties of these diverse materials, facilitating a comparative analysis to deepen understanding of the correlation between molecular structure, detonation performance, and thermal stability. Such insights provide a framework for addressing the inherent trade-offs between these properties. Additionally, the paper highlights the pivotal research direction in heat-resistant energetic materials, emphasizing the significance of designing and synthesizing new bridged and nitrogen-fused ring heat-resistant compounds, as well as advancing molecular perovskite-based materials. These endeavors not only offer novel insight for future research but also serve as a guide for the design and synthesis of next-generation heat-resistant energetic materials.

随着深井爆破、航空航天等领域的快速发展，耐热高能材料引起了世界各国科学家的广泛关注。本文综述了基于苯环、桥接氮杂环、耦合氮杂环、融合氮杂环、分子包晶和高能金属有机框架的耐热高能材料的最新研究进展。综述深入探讨了这些不同材料的合成路线、物理和化学特性，有助于进行比较分析，加深对分子结构、引爆性能和热稳定性之间相关性的理解。这些见解为解决这些特性之间的内在权衡问题提供了一个框架。此外，论文还强调了耐热高能材料的关键研究方向，强调了设计和合成新的桥接和氮熔环耐热化合物以及推进基于分子过氧化物的材料的重要性。这些努力不仅为今后的研究提供了新的见解，也为设计和合成下一代耐热高能材料提供了指导。

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引用次数: 0

Advancing sustainable ammonia synthesis with the magnetic La-doped Ti3C2O2 MXenes

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.09.005

Koua Alain Jesus Koua , Jiahe Peng , Neng Li

Developing an easy ammonia (NH₃) production method to circumvent the demanding conditions of the Haber-Bosch process is a significant stride towards self-sufficiency in NH₃ production and environment preservation. In pursuit of this goal, we carried out a theoretical approach to investigate the electrocatalytic N₂ reduction reaction (eN₂RR) using the magnetic La-doped Ti₃C₂O₂ (La-Ti₃C₂O₂) MXene electrocatalyst. The first principle calculations of the DFT, conducted using the Vienna Ab-Initio Storage Package (VASP) were instrumental in assessing the performance of ferromagnetic (FM) and antiferromagnetic (AFM) configurations of La-Ti₃C₂O₂. While Ti₃C₂O₂ reveals limitations in eN₂RR efficiency attributed to its suboptimal surface reactivity, both FM and AFM structures of La-Ti₃C₂O₂ exhibit enhanced electronic properties, enabling improved electron transfer features. La-Ti₃C₂O₂ demonstrates heightened N₂ adsorption capabilities and reduced energy barriers for transitional species towards NH₃ production, presenting superior performance to Ti₃C₂O₂. The density of states (DOS) analysis of La-Ti₃C₂O₂ provided outcomes supporting the AFM as the credible magnetic configuration, a statement reinforced by the superior N₂ conversion performance in the AFM structure compared to FM. During this process of eN₂RR, a study focused on the favorable pathway with less energy consumption is directed.

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引用次数: 0

Manufacturing of high strength bimetallic section steel with hot-rolling process

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2024-12-01 DOI: 10.1016/j.pnsc.2024.10.003

Zecheng Zhuang , Lei Zeng , Weiping Lu , Xuehai Qian , Zhen Li , Jianping Tan , Yong Xiang

This study aimed to develop a 316L/35# stainless steel–bimetallic section steel to satisfy plasticity and strength standards. The stainless steel bimetallic section was made of 316L stainless steel, whereas the base metal was made of 35# carbon steel, rolled using 13 rolling mills at 1150 °C by applying interface vacuum technology. Moreover, the mechanical properties and microstructure of the composite interface of hot-rolled stainless steel–bimetallic section steel were analyzed at multiple scales. The finished, rolled-section steel was selected as the research object. Various experiments were conducted from multiple scales: transmission electron microscopy (TEM), electron probe micro-analyses (EPMA), and scanning electron microscopy (SEM) were utilized, among other techniques for testing the mechanical properties. The results revealed that distinct carburized and decarburized zones were formed on both sides of the composite interface due to the diffusion of elements. The width of the carburized zone was 30–50 μm, and the hardness was 184.3HV, whereas the width of the decarburized zone was 80–100 μm, and the hardness was 146.4HV. In the carburized zone, short, rod-like martensite, second-phase precipitates, and chromium carbide and oxides were observed. The shear strength of the stainless clad section steel was 384.62 MPa and the ultimate strength was 599.76 MPa, far exceeding the 210 MPa required in the standard, which revealed that the bimetal achieved good metallurgical bonding. This study serves as an important theoretical basis for conducting structural integrity evaluations of bimetallic materials.

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