Abstract
Molybdenum disilicide (MoSi{sub 2}) has many attractive properties, e.g., high melting point (2020{degrees}C), relatively low density (6.28 g/cm{sup 3}), good thermal stability and thermal shock resistance, and excellent oxidation resistance, for potential high temperature applications. Specifically, it is oxidation resistant at temperatures up to about 1900{degrees}C, resulting from the formation of a self-healing, glassy silica (SiO{sub 2}) surface layer. Because of its suitability for use as a high temperature coating and as heating elements, the oxidation properties of MoSi{sub 2} have been extensively studied in the past 30 years, but mainly in the high temperature regimes. In this paper, the authors investigate the evolution and morphological characteristics of the oxidation products of both MoSi{sub 2} single crystals and cast polycrystals. Special attention is given to addressing the nucleation of pest in single crystalline material. The results from both the single- and poly-crystalline samples are correlated with an effort to resolve the origin of MoSi{sub 2} pest. Their implications to the early-stage formation (nucleation) of pest are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
