Journal
CORROSION SCIENCE
Volume 94, Issue -, Pages 1-5Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.02.033
Keywords
Ceramic matrix composite; Cobalt; Selective oxidation; EPMA; AFM
Funding
- National Natural Science Foundation of China [51474244]
- Hunan Non-ferrous Metals Holding Group Co., Ltd. [YSZN2013CL01]
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The oxidation experimental of WC-Co cemented carbides was carried out at 500 degrees C in air. Selective oxidation phenomenon of Co phase in WC-Co cemented carbides was observed and proved by EPMA and AFM. At first, the O content in Co phase increases quicldy, and then tends to be stable after oxidation of 20 min. In sharp contrast, no change of O content in WC phase Was observed. Moreover, it was found that the oxide scales thickness of Co phase increased parabolically with oxidation time. And thermodynamic and kinetic analysis of oxidation was done. (C) 2015 Elsevier Ltd. All rights reserved.
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