Control of thermal conductivity of Ni-Diamond/Al composite by doping Fe-based amorphous alloy

被引：0
|
作者：
Fang J.-X. [1 ]
Chen Q.-J. [1 ]
Gao J.-W. [2 ]
Cui X. [1 ]
Peng X.-Y. [1 ]
机构：
[1] School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang
[2] School of Civil Architecture, Nanchang Hangkong University, Nanchang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Fe based amorphous alloy; Metallic matrix composite; Microstructure; Thermal conductivity;
D O I：
10.11817/j.ysxb.1004.0609.2020-39647
中图分类号：
学科分类号：
摘要：
The surface of diamond was modified by electroless plating Ni on the surface of diamond particles. X-ray diffraction (XRD) was used to analyze the phase of Fe-based amorphous alloy. The characteristic temperature point of Fe-based amorphous powder was measured by DSC. Scanning electron microscoper (SEM) was used to observe the interface bonding and the micro morphology of the interface products. The material elements were analyzed by EDS. The thermal diffusivity of the composite was measured by laser thermal conductivity analyzer (LFA 447). The results show that, the in-situ self-exothermic heat during the crystal transformation of Fe based amorphous alloy is fully utilized to improve the fluidity of Al liquid and enhance the interface bonding of diamond/Al composite. After crystallization, the nucleation and growth of multi-component crystals of Fe based amorphous alloy increase the interfacial thermal resistance of the composite and reduce the thermal conductivity of diamond/Al composite. The introduction of Fe-based amorphous alloy improves the thermal stability of diamond/Al composite, which increases by 10.3% in the test temperature range. Too much Fe-based amorphous alloy or too long preparation time will lead to carbonization of diamond particles. © 2021, Science Press. All right reserved.
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页码：566 / 577
页数：11
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