自蔓延高温合成结合铸造技术制备复合材料的研究

将自蔓延高温合成(SHS)、粉末冶金与铸造工艺结合的复合材料制备方法,可以制备出表面层厚3～20 mm的材料.其过程是将选配好的反应物料压制成块并将其粘在型腔内或直接将混合均匀后反应物料粉体粘接在所需部位,用熔融金属液浇注并引发SHS反应,同时金属液浸透反应后的毛细孔隙,自然凝固并与母材金属结为一体,在所需表面原位合成金属-陶瓷复合层.

Application of self-Propagating High Temperature Synthesis Combined with Powder Metallurgy and Foundry in Preparation of Cermet Composite

The applicability of self-propagating high temperature synthesis(SHS)combined with powder metallurgy and foundry in the preparation of cermet composites was investigated.Thus the pre-selected and well mixed raw materials powders were pressed into blocks and adhered onto the mould or directly adhered onto the mould.The SHS reaction was initiated via casting of melted metallic fluid,during which the metallic fluid was permeated into the micropores and forged into a whole body with the metallic matrix.The resulting in-situ synthetic cermet composite had a surface layer to be as thick as 3-20 mm and would have promising application in engineering.