초록 ▼

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

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.

대표청구항 ▼

A method for producing a high temperature, high strength bond between a ceramic body and a metal substrate, which comprises the steps of: producing a volume of consolidated particulate single crystals of a selected shape of a composition matching said ceramic body, said particulate shape selected fr

A method for producing a high temperature, high strength bond between a ceramic body and a metal substrate, which comprises the steps of: producing a volume of consolidated particulate single crystals of a selected shape of a composition matching said ceramic body, said particulate shape selected from whiskers, fibers, platelets and sponges; sintering said volume of consolidated single crystal particulate shapes to form a high strength preform; grinding a first surface of said preform to a contour to substantially conform to a selected surface of said ceramic body; grinding an opposite face of said preform to substantially conform to a selected surface of said metal substrate; coating said selected surface of said ceramic body with a ceramic slip formed from fine ceramic particles, of a composition matching said ceramic body, in an organic liquid phase; pressing said first face of said preform into said slip coating; heating said ceramic body, said slip coating and said preform under time/temperature conditions to sinter said preform to said ceramic body; covering said opposite face of said preform with molten material of a composition corresponding to that of said metal substrate; pressing said molten metal material into said preform and allowing said molten material to solidify; and pressure bonding said metal substrate to said solidified material to thereby achieve said joining of said ceramic body to said metal substrate.