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High temperature refractory joining paste

  • US 6,199,747 B1
  • Filed: 08/30/1999
  • Issued: 03/13/2001
  • Est. Priority Date: 08/30/1999
  • Status: Expired due to Fees
First Claim
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1. A method of joining refractory metal components comprising the steps of:

  • (a) providing a first refractory metal component and a second refractory metal component, said first and second refractory metal components having corresponding surfaces in need of joining;

    (b) providing a joining paste mixture comprising a refractory material present in an amount between 95.0 wt. % and 99.8 wt. % and a material having a lower melting point than the refractory material present in an amount between 0.2 wt. % and 5.0 wt. % based on a total weight of said refractory material and the material having a lower melting point than the refractory material, and a binder mixture;

    (c) applying said paste mixture to the surface in need of joining on said first refractory metal component and to the surface in need of joining on said second refractory metal component;

    (d) contacting said first refractory metal component to said second refractory metal component at the surfaces in need of joining to form a joined structure;

    (e) heating the joined structure to a eutectic point of said paste mixture; and

    (f) forming a substantially refractory joint between said first and second refractory metal components.

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