Influence of Spraying Distance on Phase Composition and Electronic Property of Plasma Boron Carbide Coating

Abstract

Abstract: Boron carbide coatings were deposited under atmospheric pressure by plasma spray at different spraying distance. Their microstructure
and phase composition were studied through EPMA, EDS and XPS. Their dc conductivity was measured by standard four-probe. The results show that
the suitable spraying distance causes dense B₄C coating; the longer the spraying distance, the serious oxidation of B₄C powder is,
the spraying distance may severely affect the phase composition. The plasma spray boron carbide coatings possess semiconductor properies. The
conductivity increases with temperature. The phase composition and B/C ratio determined by the spraying distance, can affect the conductivity of boron carbide coating.

Key words: boron carbide coatings, microstructure, phase composition, conductivity

CLC Number:

TN304

ZENG Yi,ZHANG Ye-Fang,HUANG Jing-Qi,DING Chuan-Xian. Influence of Spraying Distance on Phase Composition and Electronic Property of Plasma Boron Carbide Coating[J]. Journal of Inorganic Materials.

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Influence of Spraying Distance on Phase Composition and Electronic Property of Plasma Boron Carbide Coating

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