Method of producing a high temperature, high strength bond between a ceramic shape and metal shape
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United States of America Patent
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Oct 24, 1989
Grant Date -
N/A
app pub date -
Aug 10, 1988
filing date -
Aug 10, 1988
priority date (Note) -
Expired
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Abstract
A method for producing a high temperature, high strength bond between a ceramic shape and a metal substrate, such as joining a ceramic cap to a piston for an internal combustion engine. The composite joint is effected through the use of a ceramic preform fabricated using fibers, whiskers, platelets or sponge-like particles having the same composition as the ceramic body. The preform is joined to the ceramic shape by using a ceramic slip having a ceramic corresponding in composition with the ceramic body, with this juncture being heated to achieve a secure bond. The preform is joined to the metal substrate by first infiltrating the preform with molten material corresponding to the substrate, and then pressure bonding the infiltrated preform to the substrate after the molten material has solidified. The substrate can be metal or metal alloys. An example is given for the bonding of silicon carbide to a 300 series aluminum.
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