EVOLUTION OF MICROSTRUCTURE IN OXIDATIVE GROWTH OF Al2O3/Al ALLOY COMPOSITES
来源期刊：中国有色金属学报(英文版)1996年第3期
论文作者：Xia Changqing Jin Zhanpeng
文章页码：122 - 126
Key words：oxide layer; Al2O3/Al alloy composites; oxygen activity
Abstract: The evolution of microstructure in the oxidative growth of Al2O3/Al alloy composites was examined metallographically and analyzed by electron microprobe technique. The development of a nonprotective surface layer of MgO/MgAl2O4 allowed the continuous formation of an Al2O3-matrix composite containing an interpenetrating network of metal microchannels at 1 373 K. The role of Mg in the composite growth process was discussed by means of the lgaO2-YMgphase diagram assuming that local equilibrium was established at the phase boundaries.
