Journal of Inorganic Materials

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Tribological Properties of Plasma-Sprayed Cr3C2-NiCr Coating without or with Electroless Plated Ni

LI Jian-Feng; HUANG Jing-Qi; DING Chuan-Xian   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2000-01-28 Revised:2000-02-28 Published:2001-01-20 Online:2001-01-20

Abstract: Tribological properties of plasma-sprayed Cr3C2-NiCr coatings without or with electroless plated
Ni were investigated, and the worn surfaces were analyzed by employing SEM, XRD and XPS. It was found that both the self-mated rubbing pairs consisting
of the Cr3C2-NiCr coating and the Cr3C2-NiCr coating electroless plated with Ni displayed higher friction coefficient and wear coefficient.
However, The rubbing pair of the Cr3C2-NiCr coating electroless plated with Ni against the Cr3C2-NiCr coating had a friction
coefficient of 0.12 and a wear coefficient close to 10-6mm3(Nm)-1 even if under dry sliding. The improvement in tribological properties
could be attributed to that the wear mechanism of Cr3C2-NiCr coating transformed to particle fracturing along pores and microcracks from the
intensive spalling along splat interfaces.

Key words: plasma spraying, Cr3C2-NiCr coating, electroless Ni plating, tribological property

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