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Method of producing brazing metals

  • US 4,901,904 A
  • Filed: 04/12/1988
  • Issued: 02/20/1990
  • Est. Priority Date: 07/22/1985
  • Status: Expired due to Term
First Claim
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1. A method of producing brazing metals having a layered structure for joining ceramic members mutually or a ceramic member and a metallic member to each other comprising:

  • adjusting at least one surface of a metal substrate to a surface roughness of center line average height of Ra of 0.5-2.0 microns; and

    applying at least one active metal layer, which has a melting point higher than that of the metal substrate, on said at least one surface of said metal substrate by a process selected from the group consisting of physical vapor deposition, chemical vapor deposition, and metal plating, to a thickness of 5×

    10-4 -0.1 mm, such that a thickness ratio or a thickness to diameter ratio of the active metal layer to the metal substrate is in a range of 1×

    10-2 -1×

    10-1 and a weight ratio of the active layer to the metal substrate is in a range of 0.7-4.4%.

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