Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo5SiB2 phase
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.
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).
Materials Research Society Symposium Proceedings