Cyclic oxidation behaviour of plasma sprayed metallic coatings

Autor: Abdul Quddus, Anwar Ul-Hamid, H. Saricimen
Rok vydání: 2015
Předmět:
Zdroj: Materials at High Temperatures. 32:575-582
ISSN: 1878-6413
0960-3409
DOI: 10.1179/1878641314y.0000000042
Popis: High temperature Co- and Ni-based metallic coatings of various compositions were applied on SS-310 samples using plasma spray technique. The coated samples were exposed to air under cyclic conditions at 900°C for upto 100 h. Adhesion of coatings was measured using standard ASTM C 633-79 method. Scanning electron microscopy coupled with energy dispersive X-ray spectroscopy was used to determine the surface morphology and microchemical constitution of coatings. X-ray diffraction was used to identify different phases formed during oxidation. Experimental results indicated that high temperature oxidation of SS-310 alloy was greatly reduced by all coatings. The plasma sprayed metallic coatings on SS-310 alloy performed better than that of bare SS-310 under the selected test conditions. Moreover, when compared among the selected metallic coatings used in the study, the Co-based coatings with higher Cr concentration exhibited superior performance compared to Ni-based coating with lower Cr concentration during th...
Databáze: OpenAIRE
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