Modeling of oxidation of molybdenum particles during plasma spray deposition

Citation
Yp. Wan et al., Modeling of oxidation of molybdenum particles during plasma spray deposition, MET MAT T B, 32(3), 2001, pp. 475-481
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN journal
1073-5615 → ACNP
Volume
32
Issue
3
Year of publication
2001
Pages
475 - 481
Database
ISI
SICI code
1073-5615(200106)32:3<475:MOOOMP>2.0.ZU;2-Z
Abstract
An oxidation model for molybdenum particles during the plasma spray deposit ion process is presented. Based on a well-verified model for plasma chemist ry and the heating and phase change of particles in a plasma plume, this mo del accounts for the oxidant diffusion around the surface of particles or s plats, oxidation on the surface, as well as oxygen diffusion in molten moly bdenum. Calculations are performed for a single molybdenum particle sprayed under Metco-9MB spraying conditions. The oxidation features of particles d uring the flight are compared with those during the deposition. The result shows the dominance of oxidation of a molybdenum particle during the flight , as well as during deposition when the substrate temperature is high (abov e 400 degreesC).