Ceramic-metal joining

Details Ceramic-metal joining Ceramic-metal joining

1988-11-29

1990-01-02

Seidel, Richard K.

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

228124, 22826312, 228226, 148127, B23K 3100, B23K 3522

Patent

active

048907839

ABSTRACT:
A method for improving the reliability of a ceramic-metal joint by reducing the dynamic mismatch stresses and strains on the ceramic due to the mismatch in thermal expansions of the two materials. This is done by bonding with a metal layer the ceramic to metal to form a bonding interfacial region between the ceramic and metal; and radially grading the interface region the thermal conductivity, thermal expansion coefficient, or tensile strength of the metal layer. An article in the form of a laterally graded, metallic bonding disc for overcoming problems of dynamic mismatch stresses and strains is also disclosed and claimed.

REFERENCES:
patent: 3132044 (1964-05-01), Pearsall
patent: 3805372 (1974-04-01), Wagenknecht
patent: 4348131 (1982-09-01), Shimanuki et al.
patent: 4710235 (1987-12-01), Scruggs
patent: 4757934 (1988-07-01), Greenstein

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