等离子喷涂等离子喷涂是一种材料表面强化和表面改性的技术，可以使基体表面具有耐磨、耐蚀、耐高温氧化、电绝缘、隔热、防辐射、减磨和密封等性能。

等离子涂技术是采用由直流电驱动的等离子电弧作为热源，将陶瓷、合金、金属等材料加热到熔融或半熔融状态，并以高速喷向经过预处理的工件表面而形成附着牢固的表面层的方法。

等离子喷涂亦有用于医疗用途，在人造骨骼表面喷涂一层数十微米的涂层，作为强化人造骨骼及加强其亲和力的方法。

Thermal spraying techniques are coating processes in which melted (or heated) materials are sprayed onto a surface. The "feedstock" (coating precursor) is heated by electrical (plasma or arc) or chemical means (combustion flame).

Thermal spraying can provide thick coatings (approx. thickness range is 20 micrometers to several mm, depending on the process and feedstock), over a large area at high deposition rate as compared to other coating processes such as electroplating, physical and chemical vapor deposition. Coating materials available for thermal spraying include metals, alloys, ceramics, plastics and composites. They are fed in powder or wire form, heated to a molten or semimolten state and accelerated towards substrates in the form of micrometer-size particles. Combustion or electrical arc discharge is usually used as the source of energy for thermal spraying. Resulting coatings are made by the accumulation of numerous sprayed particles. The surface may not heat up significantly, allowing the coating of flammable substances.