Ti-Cr-Mn三元系的相关系实验研究

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Abstract Through electron probe (EPMA) and X-ray diffraction (XRD) analysis of the Ti-Cr-Mn equilibrium alloy, the isothermal cross-sections of the Ti-Cr-Mn ternary system at 1 373, 1 173 and 973 K were constructed. According to present results, TiMn₂ (Laves C14) has a large solid solubility for Cr, mole fraction about 58% at 973 K, even reaching 60.5% at 1 373 K. In addition, TiMn₂ and TiCr₂can not form a continuous solid solution due to their difference in crystal structure. The TiMn_1-_x phase exists stably at 1 373 K. The solid solubility of Ti in the high temperature σ-H phase is 6.7% (mole fraction), which is higher than its solubility in the low temperature σ-L phase. In the temperature range of 973- 1 373 K, there is no ternary compound found in this ternary system. The phase relationship of Ti-Cr-Mn ternary system in the range of 973-1 373 K determined in this study can provide certain theoretical guidance for the preparation of Ti-Mn-based hydrogen storage alloys in this temperature range.

Key words： Ti-Cr-Mn ternary system equilibrated alloys phase equilibria TiMn₂alloys

Received: 17 May 2021 Published: 10 November 2021

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	LI Jiahui
	HU Ting
	CAI Gemei

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LI Jiahui,HU Ting,CAI Gemei. Experimental investigation of phase relations in the Cu-Cr-Ti system[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(5): 419-427.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I5/419

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