초록 ▼

A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strengt

A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or cermaic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials. The bond joint produced is characterized by a composite joint microstructure having relatively soft, compliant aluminum bearing particulate regions dispersed in a ceramic matrix.

대표청구항 ▼

[ We claim:] [1.] A method of joining ceramic or ceramic composite materials, comprising disposing a bonding agent at an interface between said materials wherein the bonding agent comprises a preceramic polymer, aluminum bearing particulates, and boron particulates in proportions effective to form u

[ We claim:] [1.] A method of joining ceramic or ceramic composite materials, comprising disposing a bonding agent at an interface between said materials wherein the bonding agent comprises a preceramic polymer, aluminum bearing particulates, and boron particulates in proportions effective to form upon heating a joint comprising metallic phase regions comprising aluminum disposed in a ceramic joint material and heating the interface to a temperature not exceeding about 1200 degrees C. to form said joint between the materials.