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Evaporation of Silicon from Molybdenum Silicides at High Temperature and in Hard Vacuum
Author(s) -
BLAIR G. R.,
LEVIN HERMAN,
O'BRIEN R. E.
Publication year - 1965
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1965.tb14783.x
Subject(s) - molybdenum , silicon , materials science , torr , evaporation , degradation (telecommunications) , ultra high vacuum , metallurgy , coating , composite material , nanotechnology , physics , computer science , thermodynamics , telecommunications
The nature of the degradation of molybdenum disilicide coatings on molybdenum at 3110° to 4000°F in hard vacuum (10 −7 torr) was investigated. Degradation occurred as a selective silicon loss by the successive transformations: MoSi 2 →Mo 5 Sia →Mo 3 Si →Mo. Comparison of estimated emittance values with surface composition of the coating indicated an abrupt decrease in emittance from 0.5 to 0.3 corresponding to the transformation Mo 5 Si 3 →Mo 3 Si.