Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo₅SiB₂ phase

Authors

Nobuaki Sekido
Ridwan SakidjaFollow
John H. Perepezko

Abstract

Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo5SiB 2 phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo5SiB2 phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.

Document Type

Conference Proceeding

Publication Date

8-25-2005

Recommended Citation

Sekido, Nobuaki, Ridwan Sakidja, and John H. Perepezko. "Nucleation of (Mo) Precipitates on Dislocations During Annealing of a Mo-rich Mo 5 SiB 2 Phase." MRS Online Proceedings Library Archive 842 (2004).

Journal Title

Materials Research Society Symposium Proceedings