Microstructure performance enhancement of Si3N4 reinforced laser clad KF110 base composite coatings

The KF110–Si3N4–La2O3–Cu composite coatings were fabricated on TA2 by a laser cladding (LC). Microstructure, elemental distribution, high temperature oxidation, and wear resistance were investigated. Research results showed that the nanocrystalline phases (NPs) and the amorphous phases (APs) were fo...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2022-01, Vol.19 (1), p.409-414
Main Authors: Zhang, Zhao, Li, Jianing, Sun, Xigui, Ma, Fukun, Zhang, Zhuanzhuan, Shi, Chuanwei, Li, Yajiang, Li, Chuanjie, Zhao, Bo, Liu, Zhangyan, Jiang, Xinyi, Liu, Qingwei, Han, Shunxi, Jing, Cainian
Format: Article
Language:English
Subjects:
Alloying elements
Atomic radius
ceramics
Cooling rate
Heat resistant alloys
High temperature
Lanthanum oxides
Laser beam cladding
Lasers
Microstructure
microstructures
Oxidation
Oxidation resistance
Protective coatings
Silicon nitride
surface modification
titanium alloy
Wear resistance
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Summary:The KF110–Si3N4–La2O3–Cu composite coatings were fabricated on TA2 by a laser cladding (LC). Microstructure, elemental distribution, high temperature oxidation, and wear resistance were investigated. Research results showed that the nanocrystalline phases (NPs) and the amorphous phases (APs) were formed due to the existence of the short atomic radius elements/fast cooling rate during an LC process; the uniform distributed NPs with the high interface energy were produced due to an addition of Cu, enhancing wear resistance of an LC coating. Lattice distortions were produced due to high temperature of a laser‐induced pool (LIP). Addition of the alloy elements enhanced high temperature oxidation resistance of this coating. Excessive addition of Si3N4 caused defects to be produced, enhancing the brittleness of this coating.
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.13904