采用熔滴涂覆法,在AZ91表面制备了与基体冶金结合、且与涂覆原料性能相近的A1涂层.分析了涂覆界面附近区域的显微组织形貌、相结构及化学成分,并对显微硬度和耐蚀性进行了测试.结果表明,在熔滴涂覆过程中,Mg和A1元素发生了一定程度的扩散,但富Mg液相和富A1液相混溶的过程被限制在一个薄层区域内进行,所得A1涂层的化学成分、显微硬度及耐蚀性均与涂覆原料相近.这个结果说明,通过熔滴涂覆技术,可以制各成分可控的涂层,为利用现有耐蚀耐磨材料进行镁合金的表面防护提供了可能性.
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