Phase equilibria of the Ni-Si-P system at 800 ¡ãC

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• 作者：Ya Liu ; Dachun Cao ; Hao Tu ; Xuping Su ; Jianhua Wang ; Changjun Wu ; Haoping Peng
• 关键词：Transition metal alloys and compounds ; Phase diagrams ; Microstructure ; Scanning electron microscopy (SEM) ; X-ray diffraction
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：15 November, 2013
• 年：2013
• 卷：577
• 期：Complete
• 页码：643-649
• 全文大小：2492 K

文摘

The phase equilibria in the Ni-Si-P ternary system at 800 ¡ãC were experimentally investigated using optical microscopy, scanning electron microscopy coupled with energy dispersive spectroscopy and X-ray diffraction on 34 equilibrated alloys. Twenty-three-phase equilibria were well determined at 800 ¡ãC for the phosphorous content range of up to 75 at. % . The solubilities of P in Ni₃Si, Ni₅Si₂, LT-Ni₂Si, Ni₃Si₂, NiSi₂and Ni₃Si₂, and those of Si in Ni₃P, Ni₂P or NiP₂ does not exceed 5 at. % . The solid solubility of Ni in SiP is too small to observe. The maximum solid solubility of P in NiSi is 17.5 at. % . On the other side of the system the solubility of Si in LT-Ni₅P₂, LT-Ni₁₂P₅, Ni₅P₄ and NiP₃ were measured to be 15.1 at. % , 9.4 at. % , 8.7 at. % and 5.9 at. % , respectively. The obtained phase diagrams presents nine ternary intermetallic compounds (IMCs), including three new ternary phases ¦Ó₁, ¦Ó₂ and ¦Ó₃.