铝/铝涂层复合材料液固复合法制备及其界面结合机理

摘要

A new bimetal compound technology was studied,a layer of pure aluminum coatings was coated on the core by electric arc spraying,the liquid pure aluminum was poured into the mold to achieve the combination between substrate and coatings after the layer was sandblasted,which was used to enhance the combining ca-pacity of coatings.The results show that the metallurgical bonding interface was obtained between substrate and coatings,and there was the phenomenon that liquid aluminum infiltrated into the coatings.From further study,the technology makes the liquid metal wet,infiltrate,melt and diffuse on the surface of coatings,which realizes the metallurgical bonding between substrate and coatings.%研究了一种新的双金属复合工艺，采用电弧喷涂技术对型芯预喷涂一层纯铝涂层，对涂层进行喷砂处理后，将纯铝液浇注到铸型中实现基体与涂层的结合，以此来提高涂层的结合能力。实验结果表明，基体和涂层之间实现冶金结合，并在涂层中发现有铝液渗入的现象。研究表明，在液固复合铸造过程中，铝液在涂层表面发生润湿、渗透、熔合和扩散的作用，实现了基体和涂层之间的冶金结合。