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Cu 含量对Zn-1.2Mg合金组织与力学性能的影响
Effects of Cu Content on the Microstructure and Mechanical Properties of Zn-1.2Mg Alloy
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- DOI:
- 作者:
- 韩程澄 1,2，王红星 1,2，白允强 1,2，张宇轩 1,2，程军权 1,2，鲁千怡 1,2，吴灿
HAN Chengcheng1,2, WANG Hongxing1,2, BAI Yunqiang1,2, ZHANG Yuxuan1,2, CHENG Junquan1,2, LU Qianyi1,
- 作者单位:
- 1. 南京工程学院 材料科学与工程学院，江苏 南京 211167；2. 江苏省先进结构材料与应用技术重点实验室，江苏 南京 211167
1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; 2. Key Laboratory of Advanced Structural Materials and Application Technology of Jiangsu Province, Nanjing 211167, China
- 关键词:
- Zn-1.2Mg 合金；Cu 含量；抗拉强度；CuZn5
Zn-1.2Mg alloy; Cu content; tensile strength; CuZn5
- 摘要:
- 为改善 Zn-Mg 可降解生物合金的力学性能，本文采用金属型铸造的方法，制备了 Zn-1.2Mg-xCu(x=0, 1.2,
2.2)锌合金，研究了 Cu 含量对锌合金的微观组织和力学性能的影响。 结果表明，锌合金的微观组织主要由 η-Zn (Zn 固
溶体)和 Mg2Zn11 金属间化合物组成；当 Cu 浓度为 2.2%时，合金中出现 ε-CuZn5 金属间化合物。 锌合金的显微硬度、抗
拉强度随 Cu 含量的增加而增加，在 2.2%Cu 时达到最大值，分别为 227 MPa 和 148 HV。 断口分析表明，锌合金的断裂
方式主要为解理断裂。
In order to improve the mechanical properties of Zn-Mg biodegradable alloys, Zn-1.2Mg-xCu (x=0, 1.2, 2.2) zinc alloys were prepared by metal mold casting. The effects of Cu content on the microstructure and mechanical properties of zinc alloy were studied. The results show that the microstructure of the zinc alloy is mainly composed of η-Zn (Zn solid solution) and Mg2Zn11 intermetallic compound. When the content of Cu is 2.2% , the intermetallic compound ε-CuZn5 appears. The microhardness and tensile strength of the zinc alloy increase with increasing Cu content and reach the maximum value at 2.2%Cu, which are 227 MPa and 148 HV, respectively. Fracture analysis shows that the fracture mode of Zn alloy is mainly cleavage fracture.