Journal
MATERIALS LETTERS
Volume 294, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.129807
Keywords
Electron beam cladding; Composite coatings; Titanium carbide; Titanium diboride; Microhardness; Wear resistance
Funding
- [FWRW20210035]
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Chromium carbide-based coatings were fabricated with and without TiC and TiB2 modifiers using non vacuum electron-beam cladding. The addition of modifiers altered the phase composition, microstructure, and properties of the composite coatings, enhancing their performance.
Chromium carbide-based coatings with and without TiC and TiB2 modifiers were fabricated by non vacuum electron-beam cladding. Addition of the modifiers to the initial Cr3C2 powder mixture led to a change in the phase composition, microhardness and wear resistance of the composite coatings and the alpha -> gamma transformation of Fe. TiC and TiB2 particles formed the many crystallization centers in composite coatings, which led to a refinement of their microstructure. Larger TiC particles compared to the TiB2 particles were formed in the coatings as a result of melt crystallization. TiC modifier caused a decrease in the size of dendrites, while TiB2 led to a transition from a coarse dendritic structure to an equiaxed one. The coatings with TiC modifier demonstrated the maximum microhardness, and TiB2 coating had increased wear resistance. (C) 2021 Elsevier B.V. All rights reserved.
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