Microstructure and properties of Cu-2.8Ni-0.6Si alloy

• Published in: Rare metals Vol. 32; no. 3; pp. 228 - 233
• Main Authors: Xiao, Xiang-Peng, Xiong, Bai-Qing, Huang, Guo-Jie, Cheng, Lei, Peng, Li-Jun, Liang, Qi-Ming
• Format: Journal Article
• Language: English
• Published: Springer Berlin Heidelberg Nonferrous Metals Society of China 01.06.2013; Springer Nature B.V; State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China%China Nonferrous Metals Processing Technology,Albetter Albronze Co., Ltd., Linqing 252600, China
• Subjects: Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Physical Chemistry; X-射线衍射; 合金; 微观结构; 性能; 电子显微镜观察; 相变行为; 老化时间; 调幅分解; Electrical conductivity; DO; Microstructure; Hardness; ordering; Spinodal decomposition; DO22 ordering
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-013-0056-7

The phase transformation behavior and heat treatment response of Cu-2.8Ni-0.6Si （wt%） alloy sub- jected to different heat treatments were studied by X-ray diffraction, transmission electron microscopy observation, and measurement of hardness and electrical conductivity. The variation of hardness and electrical conductivity of the alloy was measured as a function of aging time. On aging at the temperature below TR （500-550 ℃） in Cu-2.8Ni-0.6Si alloy, the transformation undergoes spinodal decomposi- tion, DO22 ordering, and δ-NiaSi phase. On aging at the temperature above TR （500-550 ℃）, the transformation products were precipitations of 8-Ni2Si. The free energy versus composition curves were employed to explain the microstructure observations.