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等离子是一种具有超高温、高流速的热源。于1958年开始引入喷镀领域。最近从一般机械设备到航空发动机各种部件都推广应用了等离子喷镀技术。等离子喷镀设备由喷枪、粉末输送装置、电源(直流)及控制系统构成。一般电气容量为40瓩。最近,为提高涂层的致密性、均匀性和结合强度而发展了80瓩的等离子喷枪。它的等离子射流温度可达7000～10000°K,速度可达1800—2900米/秒。同时,采用325目以下的细粉末为喷镀材料,对于形成致密、均匀的镀层是有利的。现在市销的喷镀材料有纯金属、合金、陶瓷材料、超硬质合金和复合材料等几类,达80多种。
Plasma is a heat source with ultra-high temperature and high velocity. In 1958 began the introduction of spraying. Recently from the general machinery and equipment to aero-engine components have all promoted the use of plasma spraying technology. Plasma spraying equipment from the gun, powder delivery device, power (DC) and control system. The general electrical capacity is 40 瓩. Recently, a plasma torch of 80 发 was developed to increase the density, uniformity and bonding strength of the coating. Its plasma jet temperature of 7000 ~ 10000 ° K, the speed of up to 1800-2900 m / s. At the same time, the use of fine powder below 325 mesh as a spray material, for the formation of dense, uniform coating is advantageous. Spray material is now available in the market of pure metals, alloys, ceramic materials, super-hard alloys and composite materials, and several categories, up to 80 kinds.