本文的中心在于提出一个方法,用以预测粉粒在等离子束中的运动和加热规律。我们在拟订Al_1O_3细粉的等离子(Ar)喷镀试验方案时,用此法作为选择工艺参数的一种理论依据。另外,这个预测还表明:等离子喷镀时弧束能量的利用效率甚低,一般不会超过10%。而提高这个效率的关键是要大大增加送粉率,因此必须重点研究改进粉料的送进技术。 The focus of this paper is to propose a method to predict the movement and heating of particles in a plasma beam. In the preparation of Al_1O_3 powder plasma (Ar) plating test program, this method is used as a theoretical basis for the selection of process parameters. In addition, this prediction also shows that: plasma spray arc beam energy utilization efficiency is very low, generally not more than 10%. The key to improve this efficiency is to greatly increase the powder feeding rate, it must focus on improving the feeding of powder technology.