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。
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.
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