Rare earth activated sintering of MoSi₂ and its electric conductivity

来源期刊：中国有色金属学报(英文版)2001年第1期

论文作者：张厚安 刘心宇 宁爱林 龙春光

文章页码：141 - 144

Key words：activated sintering； rare earth； MoSi₂； electric conductivity

Abstract: The effects of rare earth on activation sintering of MoSi₂ and electric conductivity of the matrix were analyzed on the basis of a method proposed by German and Munir. The results show that the addition of rare earth could refine the powder size and obviously reduce sintering activation energy of MoSi₂ which, for rare earth/MoSi₂ system, is 83.1kJ/mol at 1 200 ～ 14 00 ℃, about half of that of pure MoSi₂. This decreases the sintering temperature of MoSi₂ by about 200℃at least, and decreases the resistivity of the matrix as well. The mechanism of rare earth activated sintering of MoSi₂ is an integrated process mostly ruled by grain boundary diffusion. When the density of materials is identical, the rare earth addition is found to have no noticeable effect on the electric conductivity of MoSi₂.