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Methods for coating adherent diamond films on cemented tungsten carbide substrates

  • US 5,236,740 A
  • Filed: 04/26/1991
  • Issued: 08/17/1993
  • Est. Priority Date: 04/26/1991
  • Status: Expired due to Fees
First Claim
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1. A process for coating an unpolished cemented tungsten carbide substrate with a diamond film, comprising the steps of:

  • performing a first etching step comprising etching an unpolished cemented tungsten carbide substrate in Murakami'"'"'s reagent;

    performing a second etching step comprising etching said unpolished substrate in a solution of sulfuric acid and hydrogen peroxide;

    depositing a substantially continuous diamond film on a selected portion of said surface of said unpolished substrate.

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