Journal
INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING (20TH CONGRESS)
Volume 50, Issue -, Pages 293-296Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.phpro.2013.11.047
Keywords
Plasma spraying; Chromium carbide; Sparking plasma sintering; Microstructure; Metallurgical bond
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Plasma sprayed chromium carbide coating has poor adhesion strength and wear-resistance, sparking plasma sintering(SPS) process can change the coating microstructure and improve its performance. The microstructure and phase of plasma sprayed Cr3C2-NiCr coating before and after the sparking plasma sintering were studied in this paper. The results show that the microstructure of plasma sprayed Cr3C2-NiCr coating after SPS become more compact and most of the pores and micro-cracks disappear. Some new oxides appear after SPS process. Hard Chromium carbides and oxides phase distribute in the NiCr-based solid solution to improve the wear resistance of the coating. Obvious crack at the interface has disappeared. The coating and the substrate form a good metallurgical bond. (C) 2013 The Authors. Published by Elsevier B.V.
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