High-temperature sliding wear resistant Cr₁₃ Ni₅Si₂ /γ-Ni ternary metal sil icide composite

A wear resistant metal silicide composite consisting of Cr₁₃Ni₅Si₂ ternary metal silicide dendrites and thenickel-base solid solution (γ) mat rix (Cr₁₃Ni₅Si₂ /γ) was designed and fabricated by the laser melting/ continuousdeposition process. High - temperature sliding wear resistance as a function of wear test temperature and high -temperature sliding wear mechanisms of the Cr₁₃Ni₅Si₂ /γ composite were studied. The result s indicate that theCr₁₃Ni₅Si₂ /γ composite has excellent wear resistance , low temperature-sensitivity of wear and anomalous wear-temperature dependence under high-temperature sliding wear test conditions due to the st rong atomic binding forces andanomalous hardness - temperature dependence of Cr₁₃Ni₅Si₂ , good toughness and st rength of the Cr₁₃Ni₅Si₂ /γcomposite and the t ransferred cover-layer on the worn surface of the Cr₁₃Ni₅Si₂ /γ composite during the high-temperature sliding wear process. The wear resistance of the Cr₁₃Ni₅Si₂ ternary metal silicide at 600 ℃was improved tO₄ times by adding a ductileγ-Ni mat rix.