Effect of refractory metal substitution on the stability of Mo(ss)+T2 two-phase field in the Mo-Si-B system
Abstract
The influence of refractory metal substitution such as Nb and Cr for Mo in Mo-B-Si alloys on the phase stability has been examined for compositions in the Mo(ss)+T2 two-phase field. The solidification pathways as well as the width of the two-phase field at high temperature are modified by refractory metal substitutions. The characteristically severe solidification segregation found in Mo-B-Si alloys may be significantly reduced if the substitution such as Nb for Mo change the T2-phase lattice constants to facilitate a larger composition exchange between B and Si in the T2 phase. The enhanced B and Si exchange also yield as significant increase in the width of Mo(ss)+T2 two-phase field. This behavior highlights the role of atomic factor in influencing the relative stability of the T2 (D8l) phase.
Document Type
Article
DOI
https://doi.org/10.1016/S0263-4368(00)00030-5
Publication Date
1-1-2000
Recommended Citation
Sakidja, R., J. Myers, S. Kim, and J. H. Perepezko. "The effect of refractory metal substitution on the stability of Mo (ss)+ T2 two-phase field in the Mo–Si–B system." International Journal of Refractory Metals and Hard Materials 18, no. 4-5 (2000): 193-204.
Journal Title
International Journal of Refractory Metals and Hard Materials
