Abstract
Wear resistant tungsten reinforced W 5Si 3/W 2Ni 3Si intermetallic composite coatings consisting of small amount of well-developed tungsten primary dendrite and the metal silicides W 5Si 3/W 2Ni 3Si dual-phase structure were fabricated on a substrate of pure nickel plate by laser cladding process. Wear resistance of the coatings was evaluated under block-on-wheel dry-sliding wear test conditions at room temperature. Because of the strong covalent-dominant atomic bonds and the high hardness inherent to the tungsten silicides W 5Si 3 and W 2Ni 3Si, the intermetallic coatings have outstanding abrasive and adhesive wear resistance.
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