Wear-resistant coatings produced by shock-wave compaction of powders

Arto Kiiski, Pekka Ruuskanen, James Rubin

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Abstract

Wear-resistant metal-matrix composite coatings with a thickness of 1.5 mm were fabricated on low-alloy steel substrates by explosively generated shock waves. Starting materials were equivolume mixtures of WC or Cr3C2 powder mixed with either titanium or cobalt powder as a binder phase. Three different planar geometries were used, with powder layer thicknesses varying from 1 to 3 mm. Microstructural examination showed that fully dense, crack-free coatings could be produced with a uniform distribution of the carbides within the metallic binder phase. Shear strengths in excess of 40 MPa were measured for coatings composed of equivolume powder mixtures of (Cr3C2 + Ti) and (WC + Ti). The weight loss of a coating produced from an equivolume (WC + Co) powder mixture measured from a two-body abrasive wear test was significantly lower than that measured for a wear-resistant tool steel used as a reference material.
Original languageEnglish
Pages (from-to)2297-2304
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume27
Issue number8
DOIs
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed

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Keywords

  • material transaction
  • powder mixture
  • cover plate
  • impact pressure
  • generate shock wave

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