根据非均相沉淀包裹原理 ,采用铝无机盐溶液制备氧化铝前躯体包覆技术 ,研究了Al2 O3 /TiH2 包覆粉体的制备方法 .通过扫描电镜 (SEM )对Al2 O3 /TiH2 包覆颗粒分析 ,及其释氢性能的测试 ,结果表明 :氧化铝前躯体煅烧后的包覆层均匀、致密的包覆在TiH2 颗粒的表面 ,该包覆层对TiH2 的释氢行为有明显的延迟作用 .应用这种Al2 O3 /TiH2 包覆粉体作制备泡沫金属的发泡剂可显著优化其工艺性能 ,实现可控多孔泡沫金属的生产 . According to the principle of heterogeneous precipitation packing, the aluminum oxide salt solution was used to prepare alumina precursor coating and the preparation method of Al2 O3 / TiH2 coated powder was studied. The microstructure of Al2 O3 / TiH2 coated particles The results show that the calcined coating of alumina precursor is uniformly and densely coated on the surface of TiH2 particles, and the coating has a significant retardation effect on the hydrogen release behavior of TiH2 The application of this Al2 O3 / TiH2 coated powder as foaming agent in the preparation of foamed metal can significantly optimize its process performance and achieve the production of controlled porous metal foam.