期刊
RARE METALS
卷 30, 期 2, 页码 189-194出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-011-0222-8
关键词
metallic matrix composites; aluminum nitride; spark plasma sintering; density; thermal conductivity
资金
- National Natural Science Foundation of China [50971020]
- National High-Tech Research and Development Program of China [2008AA03Z505]
AlN/Al composites are a potentially new kind of thermal management material for electronic packaging and heat sink applications. The spark plasma sintering (SPS) technique was used for the first time to prepare the AlN/Al composites, and attention was focused on the effects of sintering parameters on the relative density, microstructure and, in particular, thermal conductivity behavior of the composites. The results showed that the relative density and thermal conductivity of the composites increased with increasing sintering temperature and pressure. The composites sintered at 1550 degrees C for 5 min under 70 MPa showed the maximum relative density and thermal conductivity, corresponding to 99% and 97.5 W.m(-1).K-1 respectively. However, the thermal conductivity of present AlN/Al composites is still far below the theoretical value. Possible reasons for this deviation were discussed.
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