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Investigation on the Microstructures and Thermophysical Properties of Cu-Fe64Ni32Co4 Alloys
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1.College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University,Xiamen;2.Department of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen,Guangdong

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    Based on the CALPHAD approach and vacuum arc melting technology, the Cux(Fe0.64Ni0.32Co0.04)100-x(x=30, 45, 60, wt. %) series alloys were designed and prepared. The effects of annealing process on microstructures, thermal conductivity (TC) and thermal expansion coefficients (CTE) were investigated in these prepared alloys. The result shows that the Cu-Fe64Ni32Co4 isotropic polycrystalline alloys present two separate fcc phases (fcc Cu-rich phase and fcc (Fe, Ni, Co)-rich phase) microstructures after annealing at 600 °C and 800 °C. After annealing at 600 °C for 50 h, the CTE of the alloys ranged from 6.88 to 12.36×10-6 K-1. And TC varied from 22.91 to 56.13 W.m-1.K-1. Particularly, the TC are significantly higher than that of Invar alloy, and the CTE of Cu30(Fe0.64Ni0.32Co0.04)70 and Cu45(Fe0.64Ni0.32Co0.04)55 alloys can well match with that of semiconductor in electronic packaging.

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[Wang Cuiping, Le Fancheng, Zhu Jiahua, Yang Mujin, Yang Shuiyuan, Zhang Jinbin, K. Ishida, Liu Xingjun. Investigation on the Microstructures and Thermophysical Properties of Cu-Fe64Ni32Co4 Alloys[J]. Rare Metal Materials and Engineering,2019,48(7):2122~2129.]
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History
  • Received:February 02,2018
  • Revised:May 04,2018
  • Adopted:May 18,2018
  • Online: August 01,2019
  • Published: