Effect of reinforcement and heat treatment on elevated temperature sliding of electroless Ni-P/SiC composite coatings


Franco M., SHA W., ALDIC G., MALINOV S., Çimenoğlu H.

TRIBOLOGY INTERNATIONAL, vol.97, pp.265-271, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 97
  • Publication Date: 2016
  • Doi Number: 10.1016/j.triboint.2016.01.047
  • Journal Name: TRIBOLOGY INTERNATIONAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.265-271
  • Keywords: Electroless coating, Scanning electron microscopy, Metal matrix composite, High temperature, WEAR BEHAVIOR, ALUMINUM-ALLOY, SIC PARTICLES, P COATINGS, NICKEL, CYLINDER, DEPOSITS, FRICTION, HARDNESS, MATRIX
  • Istanbul Technical University Affiliated: Yes

Abstract

The investigation is focused on the wear behaviour at elevated test temperature of composite Ni-P/SiC deposit, with varying concentration of the reinforcing SiC particles. The phase evolution measured by X-ray diffraction suggests slight crystallisation during wear testing at 200 degrees C. In coating without reinforcing particles, adhesive wear is accompanied by microcracks. The thermal heat generated and the cyclic loading could have induced sub-surface microcracks. Owing to the effective matrix-ceramics system in composite coatings, fine grooves, abrasive polishing and uniform wearing are observed. Reinforcing particles in the matrix hinder microcrack formation and significantly reduce the wear rate. Triboxidation is confirmed from energy dispersive X-ray spectrometry. (C) 2016 Elsevier Ltd. All rights reserved.