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本文将正电子湮没技术用于等离子体喷涂的研究，测量了等离子体喷涂合金的缺陷以及缺陷的退火效应，观察到了正电子寿命的一些异常现象。
In this paper, positron annihilation technique was applied to the plasma spraying. The defects of the plasma sprayed alloy and the annealing effect of the defects were measured. Some anomalous phenomena of the positron lifetime were observed.