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Open AccessArticle

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

by Xing He 1,2,3, Dejun Kong 2,4 and Renguo Song 1,2,3,*
1
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
2
Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, Jiangsu, China
3
Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
4
School of Mechanical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(2), 198; https://doi.org/10.3390/ma11020198
Received: 31 December 2017 / Revised: 19 January 2018 / Accepted: 22 January 2018 / Published: 26 January 2018
(This article belongs to the Special Issue Laser Materials Processing)
Al-TiC-CeO2 composite coatings have been prepared by using a laser cladding technique, and the microstructure and properties of the resulting composite coatings have been investigated using scanning electron microscopy (SEM), a 3D microscope system, X-ray diffraction (XRD), micro-hardness testing, X-ray stress measurements, friction and wear testing, and an electrochemical workstation. The results showed that an Al-Fe phase appears in the coatings under different applied laser powers and shows good metallurgical bonding with the matrix. The dilution rate of the coating first decreases and then increases with increasing laser power. The coating was transformed from massive and short rod-like structures into a fine granular structure, and the effect of fine grain strengthening is significant. The microhardness of the coatings first decreases and then increases with increasing laser power, and the maximum microhardness can reach 964.3 HV0.2. In addition, the residual stress of the coating surface was tensile stress, and crack size increases with increasing stress. When the laser power was 1.6 kW, the coating showed high corrosion resistance. View Full-Text
Keywords: laser cladding; Al-TiC-CeO2 composite coating; microstructure; property laser cladding; Al-TiC-CeO2 composite coating; microstructure; property
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He, X.; Kong, D.; Song, R. Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings. Materials 2018, 11, 198.

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