冷喷涂是基于空气动力学原理的一种新型喷涂技术.它是利用低温(一般低于600℃)超音速气体射流加速喷涂粒子,使粒子不熔化,以固态形式与基体发生塑性碰撞而实现涂层沉积.相比于热喷涂技术,冷喷涂可以避免材料在喷涂过程中发生过热、氧化、晶粒长大等现象,适用于非晶、纳米晶涂层的制备.介绍了冷喷涂技术的原理、特点、沉积机制和工艺参数,总结了冷喷涂纳米涂层的研究进展.
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