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
黄润华 1张震 1郭威 2吕书林 1王锦程 3吴树森1
作者信息
- 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;西北工业大学凝固技术国家重点实验室,西安 710072;深圳华中科技大学研究院,深圳 518057
- 3. 西北工业大学凝固技术国家重点实验室,西安 710072
- 折叠
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[(Cu0.5Zr0.5)0.925Al0.07Sn0.005]97Ta5非晶复合材料的抗压强度达到2 214 MPa,塑性应变达到4.3%.
Abstract
In view of the uneven precipitation and large size of B2-CuZr phase in Cu-Zr-Al-Sn amorphous compos-ites,Ta was added to the system,and heterogeneous nucleation and uniform dispersion of B2-CuZr phase was pro-moted through precipitation of Ta phase with high melting point,to obtain multi-phase reinforced CuZr-based amor-phous 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[(Cu0.5Zr0.5)0.925Al0.07Sn0.005]97Ta5 amorphous composite with opti-mal performance reach 2 214 MPa and 4.3%,respectively.
关键词
非晶复合材料/多相增强结构/室温塑性Key words
Amorphous Composites/Multi-phase Reinforced Structure/Ambient Plasticity引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据