Laser damage resistance of plasma-sprayed alumina and honeycomb skeleton/alumina composite ceramic coatings

Liu, Shuang; Tian, Zongjun; Shen, Lida; Qiu, Mingbo; Xie, Dexin; Ma, Gui-dian; Xu, Yuanye; Guo, Huan

doi:10.1016/j.ceramint.2021.11.336

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…However, low hardness and poor wear resistance severely limit their applications as transmission components [ 10 , 11 ]. In order to improve the properties of titanium alloys, a range of surface modification methods have been employed, which mainly include chemical heat treatment [ 12 , 13 ], ion implantation [ 14 , 15 ], micro-arc oxidation [ 16 , 17 ], electroplating [ 18 ], vapor deposition [ 19 , 20 ] and thermal spraying [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Scanning Speed on the Microstructure and Wear Resistance of Laser Alloying Coatings on Ti-6Al-4V Substrate

Meng

Wang

et al. 2022

Materials

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Laser alloying has attracted significant attentions due to the advantages of high processing precision, good controllability and low heat effects on the substrate. However, the complexity of laser alloying requires further attentions on its processing parameters. This study aims at improving the wear resistance of the Ti-6Al-4V substrate by means of laser surface alloying with Ni-coated graphite (G@Ni). The effect of laser scanning speed is explored. The result suggests that the coating has a high surface quality and excellent metallurgical bonding with the substrate. NiTi and NiTi2 have a eutectic microstructure as well as in the TiC ceramic-reinforced phase as dendrites distribute in the γ-Ni matrix of the coatings. At higher scanning speeds, the lower energy density and shorter existence time of the molten pool refines the microstructure of the coating, improving its microhardness. At the scanning speed of 15 mm/s, the coating has the lowest wear weight loss due to its high microhardness and dense structure. This paper explores the influence of scanning speed on the microstructure and properties of the coatings, expanding the application of laser alloying on the surface modification of Ti-6Al-4V alloys.

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