期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 33, 期 10, 页码 1421-1423出版社
ELSEVIER SCI LTD
DOI: 10.1016/S1359-835X(02)00159-8
关键词
metal-matrix composites (MMCs); interface; AlN
Three Al-AlN composites (2024, 6060, 5754 with similar to45 vol% AlN) fabricated by squeeze casting were studied by TEM. Chemical reactions occurring at the matrix-AlN interfaces have been investigated. MgAl2O4 spinel crystals were found in 6060 and 5754 composites. The magnesium element of the matrix reacts with a very thin alumina layer which is deposited on the AlN surfaces during the liquid infiltration step. The 5754 composites exhibited a stronger reaction leading to the formation of MgO phases with the spinel. Degradation of the mechanical properties was clearly shown in that case. A faceting of the AlN surfaces was observed in all composites. (C) 2002 Elsevier Science Ltd. All rights reserved.
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