非混相双金属力学性能和导电性的协同增强:以钨铜为例

IF 10.1 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
Qixiang Duan, Chao Hou, Tielong Han, Yurong Li, Haibin Wang, Xiaoyan Song, Zuoren Nie
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引用次数: 0

摘要

以钨铜(W-Cu)为代表的非混相双金属体系在对力学和物理性能都有要求的领域有着重要的应用。然而,如何充分发挥双金属两相的优势,获得优异的综合性能是一个重大的挑战。在本研究中,通过设计的粉末混合工艺和随后的快速低温烧结,制备了具有空间连接Cu和特定W岛的超细晶W - Cu双金属。所制备的双金属同时具有高屈服强度、大塑性应变和高导电性。采用数值模拟的方法,量化了不同类型钨铜双金属在载荷作用下各相的应力分布和应变响应。所报道的双金属的高屈服强度源于W岛组织的细化和晶粒的高邻接性,这增强了W对双金属总塑性变形的贡献。高导电性是由于Cu的平均自由程增加和W岛与Cu的特定相结合减少了相界的比例。这项工作为非混相金属复合材料的相位配置调制提供了新的见解,以实现高水平的多目标性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergistic Enhancement of Mechanical Properties and Electrical Conductivity of Immiscible Bimetal: A Case Study on W–Cu
Immiscible bimetal systems, of which tungsten–copper (W–Cu) is a typical representative, have crucial applications in fields requiring both mechanical and physical properties. Nevertheless, it is a major challenge to determine how to give full play to the advantages of the two phases of the bimetal and achieve outstanding comprehensive properties. In this study, an ultrafine-grained W–Cu bimetal with spatially connected Cu and specific W islands was fabricated through a designed powder-mixing process and subsequent rapid low-temperature sintering. The prepared bimetal concurrently has a high yield strength, large plastic strain, and high electrical conductivity. The stress distribution and strain response of individual phases in different types of W–Cu bimetals under loading were quantified by means of a simulation. The high yield strength of the reported bimetal results from the microstructure refinement and high contiguity of the grains in the W islands, which enhance the contribution of W to the total plastic deformation of the bimetal. The high electrical conductivity is attributed to the increased mean free path of the Cu and the reduced proportion of phase boundaries due to the specific phase combination of W islands and Cu. This work provides new insight into modulating phase configuration in immiscible metallic composites to achieve high-level multi-objective properties.
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来源期刊
Engineering
Engineering Environmental Science-Environmental Engineering
自引率
1.60%
发文量
335
审稿时长
35 days
期刊介绍: Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.
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