中文摘要：

用喷雾造粒工艺制备了Fe2O3–Al复合粉体,通过等离子喷涂工艺制备出FeAl2O4基复合材料。对Fe2O3–Al复合粉颗粒在等离子体焰流内的状态变化、反应动力学、反应产物和急冷后材料的组织结构进行研究。结果表明：Fe2O3–Al复合粉颗粒在沉积前的温度为3 274.5℃,速率为179 m/s,主要反应产物为Fe–Al–O陶瓷溶液。复合粉颗粒成分的均匀性和致密度不同,最终的反应产物也不同：含Al高的颗粒,反应产物中含有较高的Al;而含Al低的颗粒,反应产物中含有较高的Fe;并非每一个颗粒的反应产物中都有Fe形成,复合颗粒在反应极不充分时没有Fe形成。反应产物急冷凝固后形成以FeAl2O4固溶体为基的复合材料。

英文摘要：

Fe2O3–Al composite powders were prepared by spray granulation.The FeAl2O4 matrix composites were prepared by plasma spraying.The state changes,reaction kinetics and reaction products of the Fe2O3–Al composite powders in plasma flame were investigated.Results show that temperature and velocity of the composite particles before deposition on the substrate is 3 274.5 ℃ and 179 m/s,respectively.Main reaction products of the Fe2O3–Al composite powder in plasma flame were Fe–Al–O ceramic melt.Component of the composite particles with different homogeneity and relative density results in a difference of reaction product.Re-action product of the composite particles with more Al were rich in Al.Reaction products from the composite particles with less Al were rich in Fe.The Fe phase did not always exist in the reaction products.The FeAl2O4 solid solution matrix composites were formed after the deposition of reaction products on the substrate.