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Oriented graphite layer and formation

  • US 4,358,046 A
  • Filed: 03/17/1977
  • Issued: 11/09/1982
  • Est. Priority Date: 03/17/1977
  • Status: Expired due to Term
First Claim
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1. A method of forming an oriented graphite coating on a metallic substrate comprising the steps of:

  • (a) forming said metallic substrate by covering a copper or copper alloy base member with a continuous layer of nickel, nickel alloy, cobalt or cobalt alloy;

    (b) providing a substantially uniform coating of particulate carbon on the metallic substrate;

    (c) heating the coated metallic substrate in a nonreactive atmosphere to a temperature of between 800°

    C. and 1350°

    C. and below the melting point of said metallic substrate and maintaining said temperature for a period of time sufficient for saturational diffusion of said carbon into said substrate; and

    (d) thereafter cooling the metallic substrate to a temperature below about 200°

    C., thereby providing a precipitated oriented graphite film at a surface of said substrate.

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