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Title: Microstructures and properties of nickel-titanium carbide composites fabricated by laser cladding
Authors: Yu, Xinlong
Ma, Chunyang
Yao, Liming
Xiao, Zhongmin
Ren, Yongliang
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Yu, X., Ma, C., Yao, L., Xiao, Z. & Ren, Y. (2022). Microstructures and properties of nickel-titanium carbide composites fabricated by laser cladding. Ceramics International, 48(15), 21814-21821.
Journal: Ceramics International
Abstract: In this work, Ni/TiC composites were synthesized by the laser cladding technique (LCT). A scanning electron microscope (SEM), X-ray diffractometer (XRD), microhardness meter, electrochemical workstation, and friction and wear tester examined the microstructure, surface morphology, phase structure, microhardness, wear, and corrosion resistances of the Ni/TiC composites. These results indicated the Ni/40TiC composite contained finer equiaxed crystals than the Ni and Ni/20TiC composites. In addition, numerous TiC particles in the Ni/40TiC composite impeded growth of the nickel crystals, which resulted in the fine microstructure of the Ni/40TiC composite. The Ni, Ni/20TiC, and Ni/40TiC composites exhibited face-centered cubic (f c c) lattices. The average microhardness values of the Ni/20TiC and Ni/40TiC composites were approximately 748 HV and 851 HV, respectively. The Ni/40TiC composite had the lowest friction coefficient (0.43) among all three coatings, and only some shallow scratches appeared on the surface of the Ni/40TiC composite. The corrosion potential (E) of Ni/40TiC exceeded the Ni/20TiC composite, and both were larger than the Ni composite, which indicated the Ni/40TiC composite had outstanding corrosion resistance and the Ni composite had poor corrosion resistance. The corrosion current densities (i) of Ni, Ni/20TiC, and Ni/40TiC composites were 5.912, 4.405, and 3.248 μA/cm2, respectively.
ISSN: 0272-8842
DOI: 10.1016/j.ceramint.2022.04.160
Rights: © 2022 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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