期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.11.040
关键词
Aluminium (Al); Aluminium nitride (AlN); Equal channel angular pressing (ECAP); Metal matrix composite (MMC); Powder metallurgy (PM)
类别
资金
- Go8 European Fellowship
- VEGA [2/0116/11, 1/1041/11]
- SAS-NSC JRP [2011/06]
- ITMS [26240220073]
- SRDA [APVV-0647-10, APVV-0492-11]
- Australian Research Council (ARC) through a Discovery Project grant [DP0986042]
- Centre of Excellence for Design in Light Metals
- Australian Research Council [DP0986042] Funding Source: Australian Research Council
Nanoscaled aluminium nitride (AlN) reinforced aluminium matrix composites were fabricated using a novel approach where powder mixtures of Al+Mg+Sn were partially in situ nitrided in flowing nitrogen followed by consolidation through equal channel angular pressing (ECAP). The resulting composites contain up to 23.8 vol% of AlN with relative density > 98%. The microstructure shows two distinctively different alternate lamellar regions. One is the Al matrix free of AlN and the other is composed of nanoscaled AlN embedded in the Al matrix. The Al-AlN composites fabricated this way exhibited attractive properties, including thermal stability up to 450 degrees C, high compressive strength, high Young's modulus and low coefficient of thermal expansion. The presence of nanoscaled AlN reduced the thermal conductivity of the composites compared to the high thermal conductivity of Al-AlN composites prepared by metal infiltration techniques. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据