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

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...

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Bibliographic Details
Published in:Rare metals 2013-06, Vol.32 (3), p.228-233
Main Authors: Xiao, Xiang-Peng, Xiong, Bai-Qing, Huang, Guo-Jie, Cheng, Lei, Peng, Li-Jun, Liang, Qi-Ming
Format: Article
Language:English
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
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Summary: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.
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-013-0056-7