Process and composition for formation of hybrid aluminum composite coating
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of Natural Resources
InventorZheng James Chen
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Abstract
Process for formation of composite coatings and composite coatings formed thereby. A process for formation of a metal-matrix composite coating on a surface of a substrate is provided. The substrate is an aluminum alloy. The metal-matrix composite coating is formed on the substrate through laser deposition using filler materials comprising aluminum, silicon and graphite. The particles forming the metal-matrix composite coating are formed in-situ from the filler materials. A metal-matrix composite coating obtained by the laser deposition process with in-situ formation of particles is also provided.
Claims10
A process for formation of a metal-matrix composite coating on a surface of a substrate, the method comprising:
- a) melting a first portion of said surface of said substrate with a high-energy power source to form a melt pool in a melt zone;
- b) feeding filler materials into the melt zone, wherein said filler materials comprises aluminum powder, silicon powder and graphite powder;
- c) subjecting the melt zone and filler materials to the high-energy power source to allow for an in-situ reaction and formation of a solid deposit on said first portion of said surface of said substrate;
- and
- d) repeating steps a) to c) on multiple adjacent portions of said surface of said substrate to provide a continuous layer of the solid deposit thereby forming the metal-matrix composite coating,
- wherein the filler materials have a following composition ratio by mole fraction:
- aluminum from about 30% to about 65%;
- silicon from about 20% to about 50%;
- and
- graphite from about 10% to about 30%.
Dependencies are inferred from the claim text.