PHASE COMPOSITION, MICROSTRUCTURE, AND TRIBOLOGICAL PROPERTY OF PLASMA-SPRAYEDTiC-BASED COATING

Shibin Sun (), Zengda Zou, Xuemei Liu and Hanchao Shi
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Shibin Sun: School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Zengda Zou: School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Xuemei Liu: School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Hanchao Shi: School of Materials Science and Engineering, Shandong University, Jinan 250061, China

Surface Review and Letters (SRL), 2008, vol. 15, issue 06, 815-819

Abstract: TiC-based wear resistant coating was prepared by plasma spraying using reconstituted composite powders doped with ultra-fine carbide. Phase composition and microstructure of as-sprayed coating were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) utilizing backscattered imaging mode (BSE), and electron probe micro-analysis. Wear test was performed by using a ring-on-block tester under dry sliding condition. Results show that the coating adheres well to the substrate and no delamination appears.TiCcontent underwent pronounced reduction because of oxidation, reaction, and physical loss. Reactions betweenTiCandMoand probably between dissociatedCandMolead to the formation ofMo2C. Wear resistance ofNiCrMo–TiCcoating is about 4–8 times higher than that of substrate under different applied force. This work shed light on the reconstitution of spraying powder doped with ultra-fine reinforce phase particles, and the present results are important for the preparation of nano-dopedTiC-based coatings.

Keywords: Coating; microstructure; X-ray diffraction; wear (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0218625X08012049

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