Preparation of MoSi2/Al2O3 type composites by SHS

被引：7

作者：

Dumont, AL ^{[1
]}

Smith, DS ^{[1
]}

Gault, C ^{[1
]}

Bonnet, JP ^{[1
]}

机构：

[1] ENSCI, LMCTS, F-87065 Limoges, France

来源：

ANNALES DE CHIMIE-SCIENCE DES MATERIAUX | 1998年 / 23卷 / 1-2期

关键词：

D O I：

10.1016/S0151-9107(98)80002-0

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

MoSi2/Al2O3 based composites have been obtained from S.H.S. reactions between aluminum, molybdenum trioxide, and silicon or silica. The very fast reaction begins just after the melting of aluminum. The heat released raises the reaction products to a maximum temperature, T(ad), high enough to allow their partial or total melting. The control of T(ad) is achieved by the addition of some MoSi2 or Al2O3 to the starting powders. The microstructure of the final product corresponds to many silicide domains dispersed in an alumina based matrix. The silicide domains are made of MoSi2 or Mo(Si,Al)(2) grains surrounded by a Mo5Si3 phase. The matrix is made of alumina grains with amorphous and/or mullite intergranular phases. T(ad) value influences the nature and the distribution of phases inside the final product.

引用

页码：11 / 18

页数：8

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