PHYSICAL AND MICROSTRUCTURE PROPERTIES OFMgAl2C2MATRIX COMPOSITE COATING ON TITANIUM

Peng Li ()
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Peng Li: Mechanical and Electronic Engineering Department, Shandong Agriculture and Engineering University, Shandong, 250100, P. R. China

Surface Review and Letters (SRL), 2014, vol. 21, issue 01, 1-7

Abstract: This work is based on the dry sliding wear of theMgAl2C2-TiB2-FeSicomposite coating deposited on a pureTiusing a laser cladding technique. Scanning electron microscope images indicate that the nanocrystals and amorphous phases are produced in such coating. X-ray diffraction result indicated that such coating mainly consists ofMgAl2C2,Ti-B,Ti-Si,Fe-Al,Ti3SiC2,TiCand amorphous phases. The high resolution transmission electron microscope image indicated that theTiBnanorods were produced in the coating, which were surrounded by other fine precipitates, favoring the formation of a fine microstructure. With increase of the laser power from 0.85 kW to 1.00 kW, the micro-hardness decreased from 1350 ~ 1450 HV0.2to 1200 ~ 1300 HV0.2. The wear volume loss of the laser clad coating was 1/7 of pureTi.

Keywords: Surface modifications; laser processing; composites; coatings (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0218625X14500085

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