Coherent interface driven super-plastic elongation of brittle intermetallic nano-fibers at room temperature

作     者：Eun-Ae Choi Seung Zeon Han Hyung Giun Kim Jee Hyuk Ahn Sung Hwan Lim Sangshik Kim Nong-Moon Hwang Kwangho Kim Jehyun Lee Eun-Ae Choi;Seung Zeon Han;Hyung Giun Kim;Jee Hyuk Ahn;Sung Hwan Lim;Sangshik Kim;Nong-Moon Hwang;Kwangho Kim;Jehyun Lee

作者机构：Department of Special AlloyKorea Institute of Materials ScienceChangwon 642-831Korea Gangwon Regional DivisionKorea Institute of Industrial TechnologyGangneung 210-340Korea Department of Advanced Materials Science&EngineeringKangwon National UniversityChuncheon 200-701Korea Department of Materials Science and EngineeringReCAPTGyeongsang National UniversityChinju 660-701Korea Department of Materials Science and EngineeringSeoul National UniversitySeoul 151-744Korea Department of Materials Science and EngineeringPusan National UniversityBusan 46241Korea Department of Materials Science and EngineeringChangwon National UniversityChangwon 641-773Korea 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第115卷第20期

页      面：97-102页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the financial support from the National Research Foundation of Korea(Nos.2020M3D1A2098962,2018R1A5A6075959,2014M3A6B1060886) Technology Innovation Program funded By the Ministry of Trade,Industry&Energy,Korea(No.20010384) Fundamental Research Program of the Korean Institute of Materials Science(No.PNK7730) Cooperative program of Professional Development Consortium for Computational Materials Scientists in IMR,Tohoku University(No.20S0513) 

主　　题：Ni_(2)Si Intermetallic compound Plastic deformation Precipitation Brittle fiber Interface Density functional theory 

摘      要：The intermetallic compound such as Ni_(2)Si has a brittle ***,monolithic intermetallic compounds have not yet been prepared by mechanical *** mechanical drawing of bulk CuNi_(2)Si alloy at room temperature,we observed more than 400%plastic elongation of hard and brittle Ni_(2)Si intermetallic *** calculation based on the density functional theory reveals that the fully coherent interface induces strain on the intermetallic compound surrounded by the matrix,and lowers the intrinsic stacking fault energy below the level required to break an interatomic *** new interface between the Ni_(2)Si intermetallic and Cu matrix formed by the plastic deformation is as stable as the original coherent interface formed by precipitation,and the activation energy of the newly formed interface to slip is similar to that of the Cu *** of these make plastic deformation of brittle Ni_(2)Si intermetallic possible by slip without failure.