新型材料改性方法——常温超音速冷喷涂制备功能涂层

介绍一种新型材料表面改性技术－冷喷涂技术，即气体在常温下或在有限加热温度下，利用超音速气流将涂层粉末喷射到基板形成保护涂层。相对热喷涂技术而言，其不存在高温氧化、气化、晶化等影响涂层性能的效应出现，具有独到之处。结合工程实际简化建模，并完成气、固两相射流的流场计算结果。定量研究了冷喷涂试验中两相射流流对涂层效果的影响程度。还对该试验装置进行了锌粉、陶瓷粉的膜制备试验，取得了预期效果。

A New Modification Method of Materials --- Experimental Investigation of Function Coat Deposited by Supersonic Cold Spraying at Normal Temperature

A new material surface modification method,or cold spraying technology, is introduced .In this way, the coat is deposited on the target by supersonic two phase flow at normal temperature or in a little bit heated gas . Compared with thermal spraying, the main advantage of this method is that the absence of high temperature oxidizing, gasifying and melting when the particles are accelerated. The Zn and Al 2O 3 films on the part are coated respectively by cold spraying method in the present experiment.