中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 16 No. 5 October 2006 |
（1. School of Materials and Metallurgy, Northeastern University,
Shenyang 110004, China;
2. Fushun Aluminum Co Ltd, Fushun 113001, China）
Abstract: The Al-Si alloy matrix composite reinforced by γ-Al2O3 particles was produced by adding NH4AlO(OH)HCO3(AACH) into molten Al-Si alloy at 850 ℃. During stirring γ-Al2O3 particles are formed by the decomposing reaction of AACH. It is found that the γ-Al2O3 particles distribute more uniformly in the matrix by adding AACH than by adding γ-Al2O3 directly. The wear tests show that the volume loss of the unreinforced Al-Si alloy matrix is about 3 times larger than that of the γ-Al2O3 reinforced composites and that of the composites fabricated by adding γ-Al2O3 is larger than that by adding AACH.
Key words: Al-Si alloy matrix composite; Al2O3 particles; microstructure; wear
