Abstract

Mechanical alloying (MA) of Ni and P powders containing 20 and 12 wt% P was investigated. The structural changes of alloys during mechanical alloying were studied by X-ray diffractometry and transmission electron microscopy. The results showed that the interdiffusion of Ni and P elements during MA of Ni₈₀P₂₀ alloy leads to the development of Ni₁₂P₅ and Ni₂P intermetallic compounds. However MA of the Ni₈₈P₁₂ alloy leads to the formation of an intermetallic compound (Ni₃P) and a solid solution (α-Ni) as well as partially amorphous structure. Intermediate annealing of MAed Ni₈₈P₁₂ alloy does not promote the formation of fully amorphous structure. Furthermore, thermodynamic analysis using the Miedema’s semi-empirical model showed that the intermetallic phases are the most stable phases in Ni₈₈P₁₂ and Ni₈₀P₂₀ alloys during MA.

Graphic abstract

摘要

研究了含20和12 wt％P的Ni和P粉末的机械合金化（MA）。通过X射线衍射和透射电子显微镜研究了合金在机械合金化过程中的结构变化。结果表明，Ni ₈₀ P ₂₀合金在MA时Ni和P元素的相互扩散导致Ni ₁₂ P ₅和Ni ₂ P金属间化合物的形成。但是，Ni ₈₈ P ₁₂合金的MA导致形成金属间化合物（Ni ₃ P）和固溶体（α-Ni）以及部分非晶结构。MAed Ni ₈₈ P _12的中间退火合金不会促进完全非晶结构的形成。此外，使用Miedema的半经验模型进行的热力学分析表明，在MA期间，金属间相是Ni ₈₈ P ₁₂和Ni ₈₀ P ₂₀合金中最稳定的相。

图形摘要