由于空泡溃灭时产生的高温高压气泡对材料损伤影响的复杂性,目前对空泡腐蚀的机理尚无统一认识.以Ni包覆Ti粉末,采用低温超音速火焰喷涂和热处理相结合的方法在316L不锈钢上制备了Ti-Ni涂层.采用SEM、XRD等对涂层的显微结构和相组成进行了表征,并与超音速火焰喷涂WC层对比,利用超声波处理仪评价了Ti-Ni涂层的空泡腐蚀性能,并分析了涂层的失效机理.结果表明,热处理态Ti-Ni涂层以Ni-Ti合金为主晶相,并含有少量的Ni3Ti和Ti2Ni,涂层的抗空泡腐蚀性能较好,优于喷涂态和WC涂层；Ti-Ni涂层的空泡腐蚀先在涂层孔隙缺陷处萌生,形成裂纹并逐渐扩展,最终导致涂层剥落.
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