Preparation and Laser Ablation Test of Vacuum Plasma Sprayed Boron Carbide Coatings

Abstract

Abstract: Boron carbide coatings were deposited onto stainless steel via vacuum plasma spraying (VPS), and then their phase composition, microstructure, deposition efficiency, bonding strength and laser
irradiation resistance were examined. Results obtained show that there is no distinct B₂O₃ in the VPS B₄C coating, indicating that the oxidation of B₄C can be avoided during VPS process.
The denser B₄C coating can be obtained by using the finer original powder. Deposition efficiencies and bonding strengths of coatings are higher in the cases of higher spray power and higher H₂
flow due to the better melting condition of powders during spray process. Under appropriate spray parameters, the deposition efficiency and bonding strength of VPS B₄C coating can be high to
72% and 49MPa respectively. Laser ablation test shows that the laser irradiation resistance is improved significantly for stainless steel after being deposited by B₄C coating.

Key words: Boron carbide coating, vacuum plasma spray, laser ablation

CLC Number:

TG174

ZHENG Xue-Bin,JI Heng,HUANG Jing-Qi,ZENG Yi,DING Chuan-Xian. Preparation and Laser Ablation Test of Vacuum Plasma Sprayed Boron Carbide Coatings[J]. Journal of Inorganic Materials.

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Preparation and Laser Ablation Test of Vacuum Plasma Sprayed Boron Carbide Coatings

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