High temperature refractory joining paste

A method of repairing molybdenum sintering furniture comprising the steps of:

• (a) providing a first piece of sintering furniture and a second piece of sintering furniture having corresponding surfaces in need of joining;
• (b) providing a metal paste mixture comprising an organic binder mixture, and between 80.0 wt. % and 85.0 wt. % molybdenum and between 0.5 wt. % and 5 wt. % iron based on a total weight of said paste mixture;
• (c) applying a layer of said paste mixture to the surfaces in need of joining on said first and second pieces of said sintering furniture;
• (d) contacting said pieces to be joined by its surfaces having said paste mixture to form a joined piece;
• (e) heating the joined piece;
• and
• (f) forming a substantially refractory joint between said first and second pieces of sintering furniture.

A method of repairing tungsten sintering furniture comprising the steps of:

• (a) providing a first piece of sintering furniture and a second piece of sintering furniture having corresponding surfaces in need of joining;
• (b) providing a metal paste mixture comprising an organic binder mixture, and between 95.0 wt. % and 99.8 wt. % tungsten and between 0.2 wt. % and 5.0 wt. % of a material selected from the group consisting of iron, nickel and cobalt based on a total weight of the tungsten and the material selected from the group consisting of iron, nickel and cobalt;
• (c) applying a layer of said paste mixture to the surfaces in need of joining on said first and second pieces of said sintering furniture;
• (d) contacting said pieces to be joined at its surfaces having said paste mixture to form a joined piece;
• (e) heating the joined piece;
• and
• (f) forming a substantially refractory joint between said first and second pieces of sintering furniture.

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, a material having a lower melting point than the refractory material selected from the group consisting of iron, nickel and cobalt 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.