基于脱合金反应制备富Nb相增强非晶复合材料的微观组织与力学性能  

Microstructure and mechanical property of Nb-rich phase reinforced amorphous alloy matrix composites via dealloying reaction in metallic melt

作　　者：郭威 祝梦媛 赵觅 吕书林 吴树森[1] GUO Wei;ZHU Mengyuan;ZHAO Mi;LÜShulin;WU Shusen(School of Materials Science and Engineering,State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China;School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China)

机构地区：[1]华中科技大学材料科学与工程学院,材料成形与模具技术全国重点实验室,武汉430074 [2]华中科技大学航空航天学院,武汉430074 [3]深圳华中科技大学研究院,深圳518057

出　　处：《中国有色金属学报》2024年第11期3634-3642,共9页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52101138,52201075);湖北省自然科学基金资助项目(2023AFB798,2022CFB614);深圳市科技计划资助项目(JCYJ20220530160813032);广东省基础与应用基础研究基金资助项目(2022A1515011227)。

摘　　要：本文采用传统电弧熔炼与金属熔体脱合金法两种手段成功制备了富Nb相增强锆基非晶复合材料,并系统比较了上述两种方法制备获得的样品的微观组织和力学性能。结果表明:基于电弧熔炼与熔体脱合金工艺均可获得富Nb相增强非晶复合结构,无杂质析出相生成,样品热学特征值相近。但是,利用金属熔体脱合金反应制备获得的非晶复合组织中富Nb相尺寸更小,综合力学性能相比于传统电弧熔化法更加优异。因此,形变过程中富Nb相可有效阻碍基体中主剪切带的迅速扩展,促进剪切带增殖,形成多重剪切带。同时,富Nb相本身塑性变形也可进一步降低其界面应力水平,提高材料的强韧性。The Nb-rich phase reinforced Zr-based amorphous alloy matrix composites were successfully fabricated via both conventional arc-melting and dealloying in metallic melt approaches.The microstructure and mechanical property of these samples fabricated by different methods were symmetrically compared.The results show that Nb-rich phase reinforced amorphous alloy matrix composite structure without any unexpected precipitations can be obtained by both methods,and the thermal property of these samples are similar.However,the Nb-rich phase in the samples fabricated by dealloying reactions is much finer than those by arc-melting,and the subsequent mechanical property is improved for the former samples.The Nb-rich phase can effectively hinder the rapid propagation of shear bands during the deformation,causing the multiplication of it to generate multiple shear bands.Meanwhile,the plastic deformation of Nb-rich phase itself can further decrease the degree of stress concentration at the interface to improve the plasticity of the composites.

关 键 词：非晶复合材料 脱合金反应 微观组织 强韧性 

分 类 号：TG146[一般工业技术—材料科学与工程]