MICROSTRUCTURAL AND ANALYTICAL CHARACTERIZATION OF AL2O3-(AL-MG) COMPOSITE INTERFACES

[摘要] Mechanical properties of composite materials depend on the reactions taking place at the ceramic-matrix interface. This study was devoted to the identification of the mechanisms of interaction for a Saffil-(Al-Mg) composite during squeeze casting and heat treatment. Transmission electron microscopy characterization and microanalysis clearly show migration of magnesium to the interface and reactions during processing of the composite and appropriate heat treatments allowed MgO and MgAl2O4 clusters to be identified along the interface. Additionally, structural hardening of matrix through Mg2Si precipitation was made clear. Some evidence of macroheterogeneity in composition is also given.

[发布日期] 1991-03-30

[效力级别]  Proceedings Paper