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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 5    October 2001

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Ternary alloying of
Mo5Si3 with Zr, Ti, Co and V
CAO Yu(曹  昱), YI Dan-qing(易丹青), LU Bin(卢  斌),
DU Ruo-xin(杜若昕), SHU Jin-bo(舒金波)

Department of Materials Science and Engineering,
Central South University, Changsha 410083, P.R.China

Abstract: The Mo5Si3 base alloys with a series of transition metal elements were prepared by arc-melting, and were annealed at 1250℃ in vacuum for 24h. Ternary alloying effect was investigated by X-ray diffractometry (XRD), optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS). The EDS results show that Zr, Ti, Co and V have certain solubility in homogenized Mo5Si3, which are determined to be 2.20±1.42,15.94±0.18,3.33±0.76 and 7.43±0.22 (mole fraction, %), respectively. Microstructural characteristics indicate that all studied alloys have a two-phase microstructure, i.e., Mo5Si3 matrix and the second phase Mo37Zr20Si43,Mo66Si19Ti15 ,MoCoSi or (Mo, V)3Si.

 

Key words:  silicides; alloying effect; microstructure

ISSN 1672-7029
CN 43-1423/U

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