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

作　　者：Xiang-Peng Xiao Bai-Qing Xiong Guo-Jie Huang Lei Cheng Li-Jun Peng Qi-Ming Liang 

机构地区：[1]State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Institute for Nonferrous Metals [2]China Nonferrous Metals Processing Technology, Albetter Albronze Co., Ltd.

出　　处：《Rare Metals》2013年第3期228-233,共6页稀有金属（英文版）

基　　金：financially supported by National"863"Foundation of China (No. 2006AA03Z522);Science and Technology of Beijing (No. 10231103)

摘　　要：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.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.

关 键 词：Microstructure HARDNESS ELECTRICALCONDUCTIVITY Spinodal decomposition DO22 ordering 

分 类 号：TG146.11[一般工业技术—材料科学与工程]