Bonding diverse thermal expansion materials

Details Bonding diverse thermal expansion materials Bonding diverse thermal expansion materials

1994-09-06

1996-03-05

Heinrich, Samuel M.

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

2281246, 2282481, 419 9, 419 47, B23K 119, B23K10316

Patent

active

054959780

ABSTRACT:
The disclosure is for a method of bonding materials with severely mismatched coefficients of thermal expansion, such as carbon/carbon and a composite of aluminum oxide and niobium and for the structure of the bonded joint. The key to a good bond between such materials is the use of a thin layer of porous sintered metal as an intermediate material which is bonded to the two diverse thermal expansion materials. The sintered material has a porosity of 20 to 80 percent, and stays bonded to both of the different material surfaces while the sintered material itself is also not destroyed by the thermal stress.

REFERENCES:
patent: 2057661 (1936-10-01), LeVan
patent: 3055465 (1962-09-01), Pulfrich
patent: 3711361 (1973-01-01), Casadevall
patent: 3823772 (1974-07-01), Lavering et al.
patent: 4352951 (1982-10-01), Kyle
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patent: 5013615 (1991-05-01), Sisolak
patent: 5070591 (1991-12-01), Quick et al.
patent: 5463293 (1995-09-01), Beane et al.
Lindquist, Lloyd O, and Mah, Richard, "Graphite to Metal Bonding Techniques", Therm. Conduct., pub. 1978, pp. 125-132.

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