High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering

HOU Ling; SHEN Weixia; FANG Chao; ZHANG Zhuangfei; ZHANG Yuewen; WANG Qianqian; CHEN Liangchao; JIA Xiaopeng

doi:10.11858/gywlxb.20200514

Volume 34 Issue 5

Sep 2020

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Article Contents

Chinese Journal of High Pressure Physics > 2020 > 34(5): 053101.

HOU Ling, SHEN Weixia, FANG Chao, ZHANG Zhuangfei, ZHANG Yuewen, WANG Qianqian, CHEN Liangchao, JIA Xiaopeng. High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514

Citation:

HOU Ling, SHEN Weixia, FANG Chao, ZHANG Zhuangfei, ZHANG Yuewen, WANG Qianqian, CHEN Liangchao, JIA Xiaopeng. High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514

Citation:

HOU Ling, SHEN Weixia, FANG Chao, ZHANG Zhuangfei, ZHANG Yuewen, WANG Qianqian, CHEN Liangchao, JIA Xiaopeng. High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514

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High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering

doi: 10.11858/gywlxb.20200514

Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450051, Henan，China

Received Date: 24 Feb 2020
Rev Recd Date: 03 Mar 2020

Abstract

Abstract

Diamond/aluminum composites with a high thermal conductivity of 529 W/（m·K） were prepared using pure aluminum as the matrix and 50 vol.% Ti-coated 200 μm diamond as the filling material within10 min by high temperature (700 ℃) and high pressure (3 GPa) powder metallurgy method. The morphology and properties of Ti-coated diamond were characterized by optical microscope and X-ray diffraction. The properties of the prepared diamond/aluminum composite were tested by laser thermal diffusion instrument, scanning electron microscope and thermal expansion instrument. It is found that the Ti-coating diamond prepared by spark plasma sintering is mainly composed of titanium and a small amount of titanium carbide. Compared with raw diamond under the same preparation conditions, the Ti-coated diamond could effectively improve the thermal conductivity of diamond/aluminum composites. Meanwhile, the high temperature and high pressure method can be used to prepare the full density of diamond/aluminum composites, which can effectively improve the interface bonding between aluminum matrix and diamond particles, reduce the interface spaces and effectively improve the thermal conductivity of composites. Compared with the conventional methods such as vacuum hot pressing, spark plasma sintering and gas pressure infiltration, the sample preparation period of high temperature and high pressure powder metallurgy is short (several minutes). This research is helpful to expand the preparation method of high thermal conductivity composites, expand the product types of domestic six-sided top press, and provide technical support for the preparation of other metal matrix thermal conductive composites.
- high temperature and high pressure,
- powder metallurgy method,
- composites,
- diamond,
- Ti-coated

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References(33)

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