Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1989-11-13
1991-05-07
Dean, R.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428568, 428569, 428622, 428632, 428680, 428469, 429193, B22F 704
Patent
active
050136127
ABSTRACT:
An improved active metal braze filler material is provided in which the coefficient of thermal expansion of the braze filler is more closely matched with that of the ceramic and metal, or two ceramics, to provide ceramic to metal, or ceramic to ceramic, sealed joints and articles which can withstand both high temperatures and repeated thermal cycling without failing. The braze filler material comprises a mixture of a material, preferably in the form of a powder, selected from the group consisting of molybdenum, tungsten, silicon carbide and mixtures thereof, and an active metal filler material selected from the group consisting of alloys or mixtures of nickel and titanium, alloys or mixtures of nickel and zirconium, alloys or mixtures of nickel, titanium, and copper, alloys or mixtures of nickel, titanium, and zirconium, alloys or mixtures of niobium and nickel, alloys or mixtures of niobium and zirconium, alloys or mixtures of niobium and titanium, alloys or mixtures of niobium, titanium, and nickel, alloys or mixtures of niobium, zirconium, and nickel, and alloys or mixtures of niobium, titanium, zirconium, and nickel. The powder component is selected such that its coefficient of thermal expansion will effect the overall coefficient of thermal expansion of the braze material so that it more closely matches the coefficients of thermal expansion of the ceramic and metal parts to be joined.
REFERENCES:
patent: 4175164 (1979-11-01), Cole
patent: 4289833 (1981-09-01), Hachisuka
patent: 4505991 (1985-03-01), Weber
patent: 4604325 (1986-08-01), Mizuhara
patent: 4606978 (1986-08-01), Mizuhara
Hunt Thomas K.
Novak Robert F.
Dean R.
Ford Motor Company
May Roger L.
Smith Randolph A.
Wyszomierski George
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