TY  - JOUR
PY  - 2002//
TI  - Stability and heat resistance of silicide coatings on refractory metals. I. Effect of subsurface layer on process of phase redistribution in system WSi2-W
JO  - Powder Metallurgy and Metal Ceramics
A1  - Zmii, V.I.
A1  - Kovtun, N.V.
SP  - 395
EP  - 399
VL  - 41
IS  - 7-8
N2  - The effect of a subsurface layer of metal suicide on the phase composition stability of high-temperature MeSi2-type coatings on refractory metals was investigated. Using the system WSi2-W as a prototype it was experimentally determined that a subsurface layer of the tungsten disilicide, and the distribution profile of silicon in the diffusion zone upon high-temperature heating have a substantial effect on the formation of a barrier layer of lower suicide which determines the stability of the system as a whole. It is proposed that the search for more stable suicide coatings on refractory metals should be directed toward the creation of diffusion barriers on not only the inner interface MeSi2-Me, but also the external surface of the coating. The process of coating formation must be accompanied by the formation of a metal suicide on the external surface with the highest possible concentration of silicon.<p /> <p>Language: en</p>
LA  - en
SN  - 1068-1302
UR  - http://dx.doi.org/10.1023/A:1021121227445
ID  - ref1
ER  -