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.
