Preparation of High Thermal-Conductivity Flake Graphite/Al by Spark Plasma Sintering

被引：0
|
作者：
Liu Y. [1 ]
Guo H. [1 ]
Han Y. [1 ]
Zhang X. [1 ]
Fan Y. [1 ]
机构：
[1] National Engineering Research Center for Nonferrous Metals Composites, Beijing General Research Institute of Nonferrous Metals, Beijing
来源：
Guo, Hong (guohong@grinm.com) | 2018年 / Editorial Office of Chinese Journal of Rare Metals卷 / 42期
关键词：
Flake graphite; Relative density; SPS; Thermal conductivity;
D O I：
10.13373/j.cnki.cjrm.XY16021801
中图分类号：
学科分类号：
摘要：
High thermal conductivity graphite flakes was combined with aluminum to form graphite flakes/Al composites by spark plasma sintering (SPS) process. The microstructure and composition study of the composites was carried out by using optical microscope (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The interfacial bonding of composites was observed.The effects of the sintering temperature and pressure on the densification of the composites were analyzed. The influence of the content of graphite in composites on thermal conductivity of high thermal conductivity graphite flake/aluminum composites were studied. The results showed a fine interface between flake graphite and aluminum matrix without Al4C3 reaction product. Appropriate increaseof the sintering temperature and pressure promoted the densification of composites, while too high sintering temperature was likely to cause an overflow of molten aluminum. When the sintering pressure was 40 MPa and the sintering temperature was 580 ℃, the relative density of high thermal conductivity flake graphite/aluminum composites could reach 99.7%. When the content of graphite was 60%, the in-plane thermal conductivity of composites could reach 440 W•m-1•K-1 and it should meet the thermal requirements of electronic packaging materials in society nowadays very well. ©2018, Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：259 / 264
页数：5
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