In this study, Cu-Mn-P alloys with Mn/P atomic ratios ranging from 1 to 3 were designed based on computational phase diagrams. The microstructures of these alloys were systematically investigated using a combination of TEM, EPMA, EBSD, and XRD. The results indicate that the alloy with a Mn/P atomic ratio of 2 exhibits optimal comprehensive properties. A simple thermomechanical treatment involving solution treatment followed by 70% cold rolling and aging at 400°C for 6 hours resulted in a hardness of 186.8 HV, a tensile strength of 577 MPa, a yield strength of 548 MPa, and an electrical conductivity of 63.5% IACS. Alloys with Mn/P ratios below 2 showed a reduced density of precipitates, leading to diminished precipitation hardening, while higher ratios resulted in increased manganese content in the solid solution, causing lattice distortions and reduced conductivity. TEM analysis confirmed that the precipitated phase was rod-shaped hexagonal Mn2P, which grew along the (100) plane of the matrix and maintained a coherent interface with the matrix. This research provides insights for the future development of high-performance quaternary Cu-Mn-X-P alloys.
{"title":"Effect of Mn/P Atomic Ratio on the Microstructure and Properties of Cu-Mn-P Alloy","authors":"Chengzhi Zhang, Xue Xiao, Rui Zhou, Weilin Gao, Qingkui Li, Jilin He","doi":"10.1016/j.jallcom.2024.177705","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177705","url":null,"abstract":"In this study, Cu-Mn-P alloys with Mn/P atomic ratios ranging from 1 to 3 were designed based on computational phase diagrams. The microstructures of these alloys were systematically investigated using a combination of TEM, EPMA, EBSD, and XRD. The results indicate that the alloy with a Mn/P atomic ratio of 2 exhibits optimal comprehensive properties. A simple thermomechanical treatment involving solution treatment followed by 70% cold rolling and aging at 400°C for 6<!-- --> <!-- -->hours resulted in a hardness of 186.8 HV, a tensile strength of 577<!-- --> <!-- -->MPa, a yield strength of 548<!-- --> <!-- -->MPa, and an electrical conductivity of 63.5% IACS. Alloys with Mn/P ratios below 2 showed a reduced density of precipitates, leading to diminished precipitation hardening, while higher ratios resulted in increased manganese content in the solid solution, causing lattice distortions and reduced conductivity. TEM analysis confirmed that the precipitated phase was rod-shaped hexagonal Mn<sub>2</sub>P, which grew along the (100) plane of the matrix and maintained a coherent interface with the matrix. This research provides insights for the future development of high-performance quaternary Cu-Mn-X-P alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"81 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684688","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177721
Yunfei Ma, Pan Gong, Xuxiao Yang, Huie Hu, Junhan Chi, Xiao Xu, Xin Wang, Mao Zhang, Xinyun Wang
This study examines tungsten-particle (Wp) reinforced Zr-based bulk metallic glass composites (Wp/BMGCs) with 30% and 50% volume fractions, fabricated via Two-Step Spark Plasma Sintering (TSS) and Normal Spark Plasma Sintering (NS). The influence of the reinforcing phase particle size on the microstructure and mechanical properties of the material was systematically analyzed. The results reveal that reducing the Wp particle size from 200 μm to 30 μm profoundly influences the composite's interfacial and distribution effects, consequently altering its microstructure and mechanical properties. At higher Wp volume fractions, smaller particles tend to agglomerate, but increasing Wp particle size improves the reinforcement phase distribution. The densification of Wp/BMGCs is mainly influenced by interfacial effects, with smaller Wp particle sizes enhancing densification. TSS enhances interfacial bonding, further improving densification. Mechanical properties are primarily governed by interfacial effects in 30% Wp/BMGCs and 50% Wp/BMGCs prepared by NS, with smaller Wp particle sizes leading to enhanced properties. However, for 50% Wp/BMGCs prepared by TSS, distribution effects dominate at smaller sizes, with TSS process exacerbates agglomeration, deteriorating mechanical performance. Micromechanical simulations show that Wp restricts shear band expansion and promotes cross proliferation, enhancing the material's overall mechanical performance.
{"title":"Microstructure and Mechanical Properties of Zr-Based Metallic Glass Composites with Size-Variable Tungsten Reinforcements","authors":"Yunfei Ma, Pan Gong, Xuxiao Yang, Huie Hu, Junhan Chi, Xiao Xu, Xin Wang, Mao Zhang, Xinyun Wang","doi":"10.1016/j.jallcom.2024.177721","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177721","url":null,"abstract":"This study examines tungsten-particle (Wp) reinforced Zr-based bulk metallic glass composites (Wp/BMGCs) with 30% and 50% volume fractions, fabricated via Two-Step Spark Plasma Sintering (TSS) and Normal Spark Plasma Sintering (NS). The influence of the reinforcing phase particle size on the microstructure and mechanical properties of the material was systematically analyzed. The results reveal that reducing the Wp particle size from 200 μm to 30 μm profoundly influences the composite's interfacial and distribution effects, consequently altering its microstructure and mechanical properties. At higher Wp volume fractions, smaller particles tend to agglomerate, but increasing Wp particle size improves the reinforcement phase distribution. The densification of Wp/BMGCs is mainly influenced by interfacial effects, with smaller Wp particle sizes enhancing densification. TSS enhances interfacial bonding, further improving densification. Mechanical properties are primarily governed by interfacial effects in 30% Wp/BMGCs and 50% Wp/BMGCs prepared by NS, with smaller Wp particle sizes leading to enhanced properties. However, for 50% Wp/BMGCs prepared by TSS, distribution effects dominate at smaller sizes, with TSS process exacerbates agglomeration, deteriorating mechanical performance. Micromechanical simulations show that Wp restricts shear band expansion and promotes cross proliferation, enhancing the material's overall mechanical performance.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"78 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691042","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}
This study presents a flexible hybrid nanogenerator that utilizes lead-free KNNS-BF-xBNZ materials integrated with polydimethylsiloxane (PDMS) to enhance energy harvesting performance. The findings demonstrate that by combining piezoelectric and triboelectric effects, the energy conversion efficiency of the nanogenerator is significantly improved, resulting in high output voltage and current, suitable for real-world applications. Specifically, the optimal composition of KNNS-BF-xBNZ ceramics, with x = 0.03 mol.%, yields superior piezoelectric, ferroelectric, and dielectric properties, with remnant polarization (Pr), spontaneous polarization (Ps), and piezoelectric coefficient (d33) values reaching 18.8 μmC/cm², 30.3 μmC/cm², and 358 pC/N, respectively. In the hybrid device, incorporating 15 wt.% of KNNS-BF-3BNZ into PDMS resulted in the highest open-circuit voltage (VOC) of 107 V and short-circuit current (ISC) of 4.68 μA. The developed hybrid nanogenerator effectively charges capacitors for energy storage, powers LEDs, and drives small electronic devices, such as watches, showcasing its potential for practical energy harvesting applications. The findings suggest that the integration of KNNS-BF-3BNZ with PDMS provides an efficient and scalable pathway for fabricating high-performance nanogenerators, paving the way for advancements in self-powered devices and sustainable energy solutions.
{"title":"Next-Generation Hybrid Nanogenerators Using Giant Piezoelectric Lead-Free KNNS Composites for Sustainable Self-Powered Electronics","authors":"Rattiphorn Sumang, Thitirat Charoonsuk, Theerachai Bongkarn, Te-Wei Chiu, Naratip Vittayakorn, Phakakorn Panpho","doi":"10.1016/j.jallcom.2024.177681","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177681","url":null,"abstract":"This study presents a flexible hybrid nanogenerator that utilizes lead-free KNNS-BF-<em>x</em>BNZ materials integrated with polydimethylsiloxane (PDMS) to enhance energy harvesting performance. The findings demonstrate that by combining piezoelectric and triboelectric effects, the energy conversion efficiency of the nanogenerator is significantly improved, resulting in high output voltage and current, suitable for real-world applications. Specifically, the optimal composition of KNNS-BF-xBNZ ceramics, with <em>x</em> = 0.03<!-- --> <!-- -->mol.%, yields superior piezoelectric, ferroelectric, and dielectric properties, with remnant polarization (<em>P</em><sub>r</sub>), spontaneous polarization (<em>P</em><sub>s</sub>), and piezoelectric coefficient (<em>d</em><sub>33</sub>) values reaching 18.8 μmC/cm², 30.3 μmC/cm², and 358 pC/N, respectively. In the hybrid device, incorporating 15<!-- --> <!-- -->wt.% of KNNS-BF-3BNZ into PDMS resulted in the highest open-circuit voltage (<em>V</em><sub>OC</sub>) of 107<!-- --> <!-- -->V and short-circuit current (<em>I</em><sub>SC</sub>) of 4.68 μA. The developed hybrid nanogenerator effectively charges capacitors for energy storage, powers LEDs, and drives small electronic devices, such as watches, showcasing its potential for practical energy harvesting applications. The findings suggest that the integration of KNNS-BF-3BNZ with PDMS provides an efficient and scalable pathway for fabricating high-performance nanogenerators, paving the way for advancements in self-powered devices and sustainable energy solutions.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"19 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684732","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177724
Ho-Jun Son, B.S. Reddy, Ho-Jun Na, Joo-Hyun Kim, Hyo-Jun Ahn, Jou-Hyeon Ahn, Gyu-Bong Cho, Kwon-Koo Cho
Si and graphite composite (Si/G) anodes are considered promising alternatives to traditional graphite anodes, providing a higher specific capacity and improved cycle performance for high-energy Li-ion battery applications. However, the practical application of composite electrodes has been hindered by the large volume expansion of the inner Si-based particles, which leads to interfacial instability and electrode structure disintegration. This paper presents a novel solution: a cross-linked polyvinyl alcohol (PVA)/malonic acid (MA) binder for Si/G composite electrodes, synthesized through a straightforward cross-linking process. This water-soluble crosslinked polymer binder, which incorporated a carboxylic acid crosslinker (1 wt.% MA and PVA (PM11)), demonstrated excellent adhesive and good elongation properties are significantly reduced the Si/G composite anode volume expansion compared with that of a commercial binder. The developed crosslinked polymer binder PM11 facilitated an 81.5% capacity retention after 200 cycles at 0.5 C-rate. These findings highlight the pivotal role of these novel carboxylic acid cross-linker binders (crosslinked polymer binders (PM11)) in the development of next-generation Li-storage devices, emphasizing the significant impact of this study on energy storage.
硅和石墨复合（Si/G）阳极被认为是传统石墨阳极的理想替代品，可为高能锂离子电池应用提供更高的比容量和更好的循环性能。然而，复合电极的实际应用一直受到内部硅基颗粒体积膨胀过大的阻碍，导致界面不稳定和电极结构解体。本文提出了一种新颖的解决方案：一种用于 Si/G 复合电极的交联聚乙烯醇（PVA）/丙二酸（MA）粘合剂，该粘合剂是通过直接交联工艺合成的。这种水溶性交联聚合物粘合剂含有一种羧酸交联剂（1 wt.% MA 和 PVA (PM11)），具有出色的粘合性和良好的延伸性，与商用粘合剂相比，可显著减少 Si/G 复合阳极的体积膨胀。所开发的交联聚合物粘结剂 PM11 在 0.5 C 速率下循环 200 次后，容量保持率达到 81.5%。这些发现凸显了这些新型羧酸交联剂粘结剂（交联聚合物粘结剂（PM11））在开发下一代锂存储设备中的关键作用，强调了这项研究对能源存储的重大影响。
{"title":"An elastic cross-linked polymeric binder for high-performance Silicon/Graphite composite anodes in lithium-ion batteries","authors":"Ho-Jun Son, B.S. Reddy, Ho-Jun Na, Joo-Hyun Kim, Hyo-Jun Ahn, Jou-Hyeon Ahn, Gyu-Bong Cho, Kwon-Koo Cho","doi":"10.1016/j.jallcom.2024.177724","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177724","url":null,"abstract":"Si and graphite composite (Si/G) anodes are considered promising alternatives to traditional graphite anodes, providing a higher specific capacity and improved cycle performance for high-energy Li-ion battery applications. However, the practical application of composite electrodes has been hindered by the large volume expansion of the inner Si-based particles, which leads to interfacial instability and electrode structure disintegration. This paper presents a novel solution: a cross-linked polyvinyl alcohol (PVA)/malonic acid (MA) binder for Si/G composite electrodes, synthesized through a straightforward cross-linking process. This water-soluble crosslinked polymer binder, which incorporated a carboxylic acid crosslinker (1<!-- --> <!-- -->wt.% MA and PVA (PM11)), demonstrated excellent adhesive and good elongation properties are significantly reduced the Si/G composite anode volume expansion compared with that of a commercial binder. The developed crosslinked polymer binder PM11 facilitated an 81.5% capacity retention after 200 cycles at 0.5 C-rate. These findings highlight the pivotal role of these novel carboxylic acid cross-linker binders (crosslinked polymer binders (PM11)) in the development of next-generation Li-storage devices, emphasizing the significant impact of this study on energy storage.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"67 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691038","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177436
Lakshmi Shiva Shankar, Samantha K. Samaniego Andrade, Krisztina László, Zoltán Pászti, Katalin Balázsi, Zsolt Czigány, Levente Illés, Robert Kun
The authors regret that the institutional affiliation of two research fellows appearing in the acknowledgements is incorrectly listed in the first paragraph of this section. In reference to the following publication, as the corresponding author on behalf of all co-authors I would like to kindly request a corrigendum to the acknowledgements section. We kindly ask that the following correction be made to the acknowledgements paragraph of the aforementioned article.
{"title":"Corrigendum to “A fresh perspective to synthesizing and designing carbon/sulfur composite cathodes using supercritical CO2 technology for advanced Li-S battery cathodes” [J. Alloy. Compd. 1008 (2024) 176691]","authors":"Lakshmi Shiva Shankar, Samantha K. Samaniego Andrade, Krisztina László, Zoltán Pászti, Katalin Balázsi, Zsolt Czigány, Levente Illés, Robert Kun","doi":"10.1016/j.jallcom.2024.177436","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177436","url":null,"abstract":"The authors regret that the institutional affiliation of two research fellows appearing in the acknowledgements is incorrectly listed in the first paragraph of this section. In reference to the following publication, as the corresponding author on behalf of all co-authors I would like to kindly request a corrigendum to the acknowledgements section. We kindly ask that the following correction be made to the acknowledgements paragraph of the aforementioned article.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684626","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177718
Sen Ji, Lei Kang, Qingwen Ma, Yanyang Han, Shanshan Liu, Ye Liu, Xin Yang, Kai Feng
Single crystals of barium oxalatohydrophosphate Ba2(C2O4)(HPO4) were successfully synthesized by a simple solvothermal method for the first time. The crystal structure was determined from single-crystal X-ray diffraction (XRD). Ba2(C2O4)(HPO4) crystallizes in the monoclinic space group with unit cell parameters of a = 15.360(5) Å, b = 5.4418(18) Å, c = 8.969(4) Å, β = 100.48(3)o, and Z = 4. In the crystal structure of Ba2(C2O4)(HPO4), C2O4 groups are arranged in a completely consistent orientation. Therefore, Ba2(C2O4)(HPO4) shows a large birefringence of 0.097 at 550 nm. UV-Vis-NIR diffuse reflectance and theory calculation show that Ba2(C2O4)(HPO4) is a direct bandgap semiconductor with a bandgap of 4.33 eV. Fourier transform infra-red (FTIR) and Raman spectra confirm the crystal structure of Ba2(C2O4)(HPO4).
{"title":"A New Alkali-Earth Metal Oxalatohydrophosphate Crystal Ba2(C2O4)(HPO4): Synthesis, Structure, Optical and Thermal Properties","authors":"Sen Ji, Lei Kang, Qingwen Ma, Yanyang Han, Shanshan Liu, Ye Liu, Xin Yang, Kai Feng","doi":"10.1016/j.jallcom.2024.177718","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177718","url":null,"abstract":"Single crystals of barium oxalatohydrophosphate Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>) were successfully synthesized by a simple solvothermal method for the first time. The crystal structure was determined from single-crystal X-ray diffraction (XRD). Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>) crystallizes in the monoclinic <span><math><mi is=\"true\">C</mi><mn is=\"true\">2</mn><mo is=\"true\">/</mo><mi is=\"true\">m</mi></math></span> space group with unit cell parameters of <em>a</em> = 15.360(5) Å, <em>b</em> = 5.4418(18) Å, <em>c</em> = 8.969(4) Å, <em>β</em> = 100.48(3)<sup>o</sup>, and Z = 4. In the crystal structure of Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>), C<sub>2</sub>O<sub>4</sub> groups are arranged in a completely consistent orientation. Therefore, Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>) shows a large birefringence of 0.097 at 550<!-- --> <!-- -->nm. UV-Vis-NIR diffuse reflectance and theory calculation show that Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>) is a direct bandgap semiconductor with a bandgap of 4.33<!-- --> <!-- -->eV. Fourier transform infra-red (FTIR) and Raman spectra confirm the crystal structure of Ba<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(HPO<sub>4</sub>).","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"60 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684623","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}
High entropy alloys (HEAs) represent a novel class of multi-component materials characterized by a paradigm-shifting design that incorporates five or more principal elements in nearly equal proportions. This configuration results in high configurational entropy and the formation of solid solutions. This review succinctly outlines the theoretical foundations of HEAs, including the entropy of the alloy and its thermodynamic stability, following a discussion of design principles and first-principles calculations that are crucial for alloy optimization, we provide a comprehensive review of various preparation techniques, such as mechanical alloying, magnetron sputtering, vacuum smelting, and additive manufacturing, emphasizing their influence on the properties of HEAs. The paper meticulously examines the core effects of these alloys—high entropy, lattice distortion, slow diffusion, and cocktail effects—which contribute to their unique attributes. Additionally, the review explores the promising applications of HEAs in sectors such as aerospace, energy, chemical industries, hydrogen storage, and ocean engineering, highlighting the increasing demand for advanced materials. Looking ahead, we propose future research directions that focus on the interplay between multi-scale structures and properties, interdisciplinary preparation technologies, and sustainable alloy recovery and reuse strategies. This review aims to provide both theoretical insights and practical guidelines for the rapidly evolving field of high entropy alloys.
高熵合金（HEAs）是一类新型的多组分材料，其特点是以几乎相等的比例整合了五个或更多的主要元素，从而改变了设计模式。这种结构导致了高构型熵和固溶体的形成。这篇综述简明扼要地概述了 HEA 的理论基础，包括合金的熵及其热力学稳定性。在讨论了对合金优化至关重要的设计原则和第一性原理计算之后，我们全面综述了各种制备技术，如机械合金化、磁控溅射、真空熔炼和快速成型制造，强调了它们对 HEA 性能的影响。论文仔细研究了这些合金的核心效应--高熵、晶格畸变、慢扩散和鸡尾酒效应--这些效应造就了它们的独特属性。此外，综述还探讨了 HEAs 在航空航天、能源、化学工业、储氢和海洋工程等领域的应用前景，强调了对先进材料日益增长的需求。展望未来，我们提出了未来的研究方向，重点关注多尺度结构和性能、跨学科制备技术以及可持续合金回收和再利用战略之间的相互作用。本综述旨在为快速发展的高熵合金领域提供理论见解和实践指南。
{"title":"High entropy alloys: a review of preparation techniques, properties and industry applications","authors":"Yi-Fei Yang, Feng Hu, Ting Xia, Rui-Han Li, Jun-Yu Bai, Jia-Qi Zhu, Jian-Yi Xu, Guo-Fang Zhang","doi":"10.1016/j.jallcom.2024.177691","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177691","url":null,"abstract":"High entropy alloys (HEAs) represent a novel class of multi-component materials characterized by a paradigm-shifting design that incorporates five or more principal elements in nearly equal proportions. This configuration results in high configurational entropy and the formation of solid solutions. This review succinctly outlines the theoretical foundations of HEAs, including the entropy of the alloy and its thermodynamic stability, following a discussion of design principles and first-principles calculations that are crucial for alloy optimization, we provide a comprehensive review of various preparation techniques, such as mechanical alloying, magnetron sputtering, vacuum smelting, and additive manufacturing, emphasizing their influence on the properties of HEAs. The paper meticulously examines the core effects of these alloys—high entropy, lattice distortion, slow diffusion, and cocktail effects—which contribute to their unique attributes. Additionally, the review explores the promising applications of HEAs in sectors such as aerospace, energy, chemical industries, hydrogen storage, and ocean engineering, highlighting the increasing demand for advanced materials. Looking ahead, we propose future research directions that focus on the interplay between multi-scale structures and properties, interdisciplinary preparation technologies, and sustainable alloy recovery and reuse strategies. This review aims to provide both theoretical insights and practical guidelines for the rapidly evolving field of high entropy alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684678","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177722
Dohyeon Yu, Dan Na, Hwan Kim, Dong Ick Son, David D. Lee, Inseok Seo
Li-CO2 batteries (LCBs) have attracted significant research interest owing to their potential as energy storage devices and their contribution to carbon neutrality. In this study, we synthesized a solid electrolyte using Si-doped Li1.4Al0.4Ti1.6(PO4)3 (LASTP), by incorporating Si into the NASICON-structured LATP. Through Si doping, P in the tetrahedral PO4 units within the NASICON framework is substituted with Si, and bridging oxygen bonds are formed after high-temperature heat treatment The LASTP powder synthesized via a solution-based method exhibited uniform particle size and composition, and the resulting pellet achieved high densification and the formation of interconnected structures. The pellet exhibited an ionic conductivity of approximately 8.8 × 10-4 S/cm at 25℃. The LCB utilizing LASTP demonstrated a maximum discharge capacity of 23,887 mAh/g and successfully operated for 200 cycles at a current density of 100 mA/g with a cut-off capacity of 500 mAh/g. The post-cycling analysis of the cathode confirmed the reversible reactions of the LCB. Additionally, comparative post-cycling XPS analysis of LATP and LASTP revealed that Si doping in LASTP mitigated the reduction of Ti4+ to Ti3+, thereby enhancing the chemical stability of the solid electrolyte. Also, the structural stability of the solid electrolyte was enhanced owing to the formation of new bonds, surpassing the cycle performance and full-depth capacity of LCBs using conventional solid electrolytes. The introduction of structurally and chemically stabilized LASTP enabled the realization of long-lasting, high-capacity LCBs.
{"title":"Si-doped NASICON-type Li1.4Al0.4Ti1.6(PO4)3 solid electrolytes for enhanced stability and performance of Li-CO2 batteries","authors":"Dohyeon Yu, Dan Na, Hwan Kim, Dong Ick Son, David D. Lee, Inseok Seo","doi":"10.1016/j.jallcom.2024.177722","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177722","url":null,"abstract":"Li-CO<sub>2</sub> batteries (LCBs) have attracted significant research interest owing to their potential as energy storage devices and their contribution to carbon neutrality. In this study, we synthesized a solid electrolyte using Si-doped Li<sub>1.4</sub>Al<sub>0.4</sub>Ti<sub>1.6</sub>(PO<sub>4</sub>)<sub>3</sub> (LASTP), by incorporating Si into the NASICON-structured LATP. Through Si doping, P in the tetrahedral PO<sub>4</sub> units within the NASICON framework is substituted with Si, and bridging oxygen bonds are formed after high-temperature heat treatment The LASTP powder synthesized via a solution-based method exhibited uniform particle size and composition, and the resulting pellet achieved high densification and the formation of interconnected structures. The pellet exhibited an ionic conductivity of approximately 8.8 × 10<sup>-4<!-- --> </sup>S/cm at 25℃. The LCB utilizing LASTP demonstrated a maximum discharge capacity of 23,887<!-- --> <!-- -->mAh/g and successfully operated for 200 cycles at a current density of 100<!-- --> <!-- -->mA/g with a cut-off capacity of 500<!-- --> <!-- -->mAh/g. The post-cycling analysis of the cathode confirmed the reversible reactions of the LCB. Additionally, comparative post-cycling XPS analysis of LATP and LASTP revealed that Si doping in LASTP mitigated the reduction of Ti<sup>4+</sup> to Ti<sup>3+</sup>, thereby enhancing the chemical stability of the solid electrolyte. Also, the structural stability of the solid electrolyte was enhanced owing to the formation of new bonds, surpassing the cycle performance and full-depth capacity of LCBs using conventional solid electrolytes. The introduction of structurally and chemically stabilized LASTP enabled the realization of long-lasting, high-capacity LCBs.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"20 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691045","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177712
Saisai Zhang, Mingli Xing, Yi Zheng, Bowen Zhang, Na Luo, Yan Wang, Zhanying Zhang
Aimed at realizing the sensors capable of functioning effectively in high-humidity environments, the Pt/SnO2/NiO ternary composite materials featuring noble metal and p-n heterojunction structures was synthesized. The dispersion of SnO2 and Pt nanoparticles on NiO nanosheets was found to be excellent, resulting in a nearly twofold increase (99.45 m2g-1 of Pt/SnO2/NiO) in specific surface area compared to pure NiO materials (51.977 m2g-1). The CO sensitivity tests revealed that, in contrast to pure NiO sensors (with an optimal operating temperature of 290°C), Pt/SnO2/NiO ternary composites exhibited an optimal operating temperature (OOT) of 270℃, a decrease of 20℃ for CO detection at a relative humidity of 22%. At this OOT, Pt/SnO2/NiO sensors consistently displayed high responsiveness (2.5 times higher than that of the pure NiO sensor), good selectivity, and rapid response-recovery times (the recovery time is reduced by nearly half compared to that of the pure NiO sensor). Furthermore, the sensors' responses to CO under different humidity conditions (from 22% to 91%) at 270℃ were investigated. The results demonstrated that Pt/SnO2/NiO sensors exhibited minimal variation in their response to CO at a range of relative humidity levels (41.5% at 91%, 39.5% at 22%, respectively). These results highlight that the enhancement of CO gas sensitivity in the sensors primarily results from the high catalytic activity of noble metal Pt and the p-n heterojunction interaction.
{"title":"Humidity-independent gas sensor based on Pt/SnO2/NiO with advanced CO sensing capabilities","authors":"Saisai Zhang, Mingli Xing, Yi Zheng, Bowen Zhang, Na Luo, Yan Wang, Zhanying Zhang","doi":"10.1016/j.jallcom.2024.177712","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177712","url":null,"abstract":"Aimed at realizing the sensors capable of functioning effectively in high-humidity environments, the Pt/SnO<sub>2</sub>/NiO ternary composite materials featuring noble metal and p-n heterojunction structures was synthesized. The dispersion of SnO<sub>2</sub> and Pt nanoparticles on NiO nanosheets was found to be excellent, resulting in a nearly twofold increase (99.45 m<sup>2</sup>g<sup>-1</sup> of Pt/SnO<sub>2</sub>/NiO) in specific surface area compared to pure NiO materials (51.977 m<sup>2</sup>g<sup>-1</sup>). The CO sensitivity tests revealed that, in contrast to pure NiO sensors (with an optimal operating temperature of 290°C), Pt/SnO<sub>2</sub>/NiO ternary composites exhibited an optimal operating temperature (OOT) of 270℃, a decrease of 20℃ for CO detection at a relative humidity of 22%. At this OOT, Pt/SnO<sub>2</sub>/NiO sensors consistently displayed high responsiveness (2.5 times higher than that of the pure NiO sensor), good selectivity, and rapid response-recovery times (the recovery time is reduced by nearly half compared to that of the pure NiO sensor). Furthermore, the sensors' responses to CO under different humidity conditions (from 22% to 91%) at 270℃ were investigated. The results demonstrated that Pt/SnO<sub>2</sub>/NiO sensors exhibited minimal variation in their response to CO at a range of relative humidity levels (41.5% at 91%, 39.5% at 22%, respectively). These results highlight that the enhancement of CO gas sensitivity in the sensors primarily results from the high catalytic activity of noble metal Pt and the p-n heterojunction interaction.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"60 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684685","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}
Pub Date : 2024-11-22DOI: 10.1016/j.jallcom.2024.177663
Mengjia Wei, Lei Wang, Sajjad Ur Rehman, Xianguo Luo, Yifeng Hu, Changcai Chen, Tongxiang Liang
Silicon carbide (SiC) is considered as a potential wave-absorbing material, but pure SiC has a low dielectric constant and no magnetic loss. In this paper, (cobalt loaded carbon nanotubes) Co-CNT is chosen as the composite material. The conductivity of CNT is utilized to improve the dielectric properties of SiC, while the magnetic permeability of Co can enrich the loss mechanism of SiC. SiC composite cobalt loaded carbon nanotubes (SiC@Co-CNT) composites were successfully prepared by using the carbothermal reduction method. The electromagnetic parameters of the composites are regulated by adjusting the Co content, which in turn optimises the microwave absorbing performance of the composites. The results show that the microwave absorbing performance of the SiC@Co-CNT composite is significantly improved. In particular, when the Co content is 20 wt%, the reflection loss (RL) value is -57.67 dB at 10.1 GHz and 2.63 mm, and the effective absorption bandwidth is 3.75 GHz (8.05-11.8 GHz). This work provides new research ideas for the application of SiC in the field of absorbing materials.
碳化硅（SiC）被认为是一种潜在的吸波材料，但纯碳化硅的介电常数低且无磁损耗。本文选择 Co-CNT 作为复合材料。利用 CNT 的导电性来改善 SiC 的介电性能，而 Co 的磁导率则可以丰富 SiC 的损耗机制。利用碳热还原法成功制备了 SiC 复合钴负载碳纳米管（SiC@Co-CNT）复合材料。通过调节钴含量来调节复合材料的电磁参数，进而优化复合材料的微波吸收性能。结果表明，SiC@Co-CNT 复合材料的微波吸收性能显著提高。其中，当 Co 的含量为 20 wt% 时，在 10.1 GHz 和 2.63 mm 时的反射损耗 (RL) 值为 -57.67 dB，有效吸收带宽为 3.75 GHz (8.05-11.8 GHz)。这项工作为碳化硅在吸波材料领域的应用提供了新的研究思路。
{"title":"SiC@Co-CNT composites with tunable electromagnetic parameters for microwave absorption","authors":"Mengjia Wei, Lei Wang, Sajjad Ur Rehman, Xianguo Luo, Yifeng Hu, Changcai Chen, Tongxiang Liang","doi":"10.1016/j.jallcom.2024.177663","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177663","url":null,"abstract":"Silicon carbide (SiC) is considered as a potential wave-absorbing material, but pure SiC has a low dielectric constant and no magnetic loss. In this paper, (cobalt loaded carbon nanotubes) Co-CNT is chosen as the composite material. The conductivity of CNT is utilized to improve the dielectric properties of SiC, while the magnetic permeability of Co can enrich the loss mechanism of SiC. SiC composite cobalt loaded carbon nanotubes (SiC@Co-CNT) composites were successfully prepared by using the carbothermal reduction method. The electromagnetic parameters of the composites are regulated by adjusting the Co content, which in turn optimises the microwave absorbing performance of the composites. The results show that the microwave absorbing performance of the SiC@Co-CNT composite is significantly improved. In particular, when the Co content is 20<!-- --> <!-- -->wt%, the reflection loss (RL) value is -57.67<!-- --> <!-- -->dB at 10.1<!-- --> <!-- -->GHz and 2.63<!-- --> <!-- -->mm, and the effective absorption bandwidth is 3.75<!-- --> <!-- -->GHz (8.05-11.8<!-- --> <!-- -->GHz). This work provides new research ideas for the application of SiC in the field of absorbing materials.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"63 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684734","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}
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