(东北大学 材料与冶金学院， 沈阳 110006)
摘 要: 通过水化实验，对稀土硅化物合金中逸出的PH3气体进行了定性与定量分析。采用S300型扫描电子显微镜，分析了含P稀土硅化物合金的微观结构及P元素的分布特点，研究了稀土硅化物合金中PH3气体的逸出现象与P元素存在形态的关系。结果表明：合金中只有少量的P以气体形式放出，大部分的P仍稳定地存在于水化后的合金中；合金中PH3气体的放出与合金中的RESi2相关系密切。
关键字: 稀土硅化物合金； PH3气体； 逸出
（School of Material and Metallurgy, Northeastern University,
Shenyang 110006, P.R.China）
Abstract:To determine the evolution of PH3 gas from the rare earth(RE) silicide alloy, the qualitative and quantitative analyses of PH3 were done by water-reaction experiment. With S300 SEM, the microstructure of P contented in RE silicide alloy and the distribution character of P element in alloy were studied, and the relationship between PH3 gas evolution phenomenon and the existential state of P element in the alloy were discussed further. The results demonstrate that only a little P is released as gas, most of P exists steadily in the alloy after immersed in water, and the evolution of PH3 gas is closely related with the RESi2 phases in the alloy.
Key words: rare earth silicide alloy; PH3 gas; evolution
