通过介导相分离制备的纳米结构W-Cu基复合材料的性能

作     者：侯超 吕皓 赵治 Xintao Huang 韩铁龙 Junhua Luan Zengbao Jiao 宋晓艳 Zuoren Nie Chao Hou;Hao Lu;Zhi Zhao;Xintao Huang;Tielong Han;Junhua Luan;Zengbao Jiao;Xiaoyan Song;Zuoren Nie

作者机构：Key Laboratory of Advanced Functional MaterialsMinistry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Department of Materials Science and EngineeringCity University of Hong KongHong Kong 999077China Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China 

出 版 物：《Engineering》 (工程（英文）)

年 卷 期：2023年第26卷第7期

页      面：173-184,I0007页

核心收录：

学科分类：0810[工学-信息与通信工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(51621003,52101003,92163107,and 52101032) the National Key Research and Development Program of China(2021YFB3501502) the International Cooperation Seed Fund of Beijing University of Technology(2021B26) 

主　　题：Immiscible-component composite Phase separation Nanostructure Mechanical properties Interface modulation 

摘      要：The challenge of fabricating nanostructured W–Cu composites by powder metallurgy has been solved by means of modulated phase separation.A hierarchically nanostructured(HN)W–Cu composite was prepared using intermediary Al through sluggish asynchronous phase *** addition to a dual network composed of a Cu phase and the W–Cu nanostructure,dense Al-containing nanoprecipitates with a body-centered cubic(bcc)structure are distributed in the W *** with a pristine W/Cu interface,the newly formed W/Cu interfaces modulated by Al and the coherent W/Al-containing particle interfaces possess lower energy and enhanced bonding strength due to efficient electron transfer and strong coupling *** a large number of stable heterogeneous interfaces and a“selflockinggeometry,the HN W–Cu composite exhibits excellent resistance against plastic *** combination of the presented composite’s hardness and compressive strength outperforms all other sintered W–Cu composites with the same Cu *** a reciprocating sliding load,the reactive Al prevents excessive *** excellent synergy of the hardness and toughness of the friction-induced surface endows the HN composite with high abrasion *** study provides a new strategy to modulate the structure and energy state of interfaces in metallic composites containing immiscible components in order to achieve high mechanical performance.