Ta含量对多相增强CuZr基非晶复合材料组织性能的影响  

Effects of Ta Content on Microstructure and Properties of Multi-phase Reinforced CuZr Based Amorphous Composites

作　　者：黄润华 张震 郭威 吕书林[1] 王锦程 吴树森[1] Huang Runhua;Zhang Zhen;Guo Wei;LüShulin;Wang Jincheng;Wu Shusen(State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074;State Key Laboratory of Solidifiction Processing,Northwestern Polytechnical University,Xi’an 710072;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057)

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]西北工业大学凝固技术国家重点实验室,西安710072 [3]深圳华中科技大学研究院,深圳518057

出　　处：《特种铸造及有色合金》2024年第2期267-271,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52101138);湖北省自然科学基金资助项目(2023AFB798);深圳市科技计划资助项目(JCYJ20220530160813032);西北工业大学凝固技术国家重点实验室开放课题资助项目(SKLS202309)。

摘　　要：针对Cu-Zr-Al-Sn非晶复合材料中B2-CuZr相析出不均匀,尺寸较大的问题,向体系中添加Ta元素,旨在通过高熔点富Ta相的析出,促进B2-CuZr相的异质形核与均匀分散,制备多相增强CuZr基非晶复合材料。研究了不同Ta添加量时复合材料的组织与性能的演化规律,发现引入的富Ta相可成为B2-CuZr相的有效异质形核基底,调控B2-CuZr相的析出量、尺寸和分布,形成的多相增强结构可有效改善合金的力学性能。随着Ta含量增加,试样的屈服强度逐渐降低,塑性变形能力先增加后减小,性能最优异的[(Cu_(0.5)Zr_(0.5))_(0.925)Al_(0.07)Sn_(0.005)]_(97)Ta_(5)非晶复合材料的抗压强度达到2214 MPa,塑性应变达到4.3%。In view of the uneven precipitation and large size of B2-CuZr phase in Cu-Zr-Al-Sn amorphous composites,Ta was added to the system,and heterogeneous nucleation and uniform dispersion of B2-CuZr phase was promoted through precipitation of Ta phase with high melting point,to obtain multi-phase reinforced CuZr-based amorphous composites.The evolution law of microstructure and properties of the composites with different Ta contents was systematically investigated.The results indicate that the introduced Ta-rich phase acts as an effective heterogeneous nucleation site for B2-CuZr phase,and regulate the precipitation amount,dimension and distribution of B2-CuZr phase,to generate multi-phase reinforcing structure to effectively enhance mechanical properties.With the increase of Ta content,the yield strength is decreased gradually,and plastic deformation ability is increased firstly and then decreased.The tensile strength and plastic strain of[(Cu_(0.5)Zr_(0.5))_(0.925)Al_(0.07)Sn_(0.005)]_(97)Ta_(5) amorphous composite with optimal performance reach 2214 MPa and 4.3%,respectively.

关 键 词：非晶复合材料 多相增强结构 室温塑性 

分 类 号：TB331[一般工业技术—材料科学与工程] TG1398[金属学及工艺—合金]