초록 ▼

Ceramic honeycomb (32) is made by applying adhesive (10) to parts of node regions (6) of a stack (12) of ceramic fabrics (2) to bond adjacent fabrics to one another at nodes (20) defined by the adhesive. The ceramic fabric stack is expanded and then impregnated in a ceramic matrix. The impregnated s

Ceramic honeycomb (32) is made by applying adhesive (10) to parts of node regions (6) of a stack (12) of ceramic fabrics (2) to bond adjacent fabrics to one another at nodes (20) defined by the adhesive. The ceramic fabric stack is expanded and then impregnated in a ceramic matrix. The impregnated stack (18), dried to be self-supporting but still flexible, can be kiln-fired at this point or it can be encapsulated in an encapsulant (26) such as polyvinyl alcohol. The encapsulated stack (24) is then autoclaved at 100 psi and 185.degree. F. causing the matrix binder to set, thus rigidifying the encapsulated fabric stack. Autoclaving also causes the fabric at the nodes to squeeze together to create intimate contact, and thus high strength bonds during subsequent firing, between the fabrics at the nodes. The encapsulated stack is fired to drive off non-ceramic material to create the ceramic honeycomb. The minimum bending radius of the ceramic fibers at the nodes can be increased using one or more methods.

대표청구항 ▼

[ What is claimed is:] [1.] A method for making ceramic honeycomb comprising:selecting a wave shaped adhesive pattern;applying an adhesive in the selected wave shaped adhesive pattern to minor portions of node regions of a plurality of ceramic fabrics so that major portions of the node regions are f

[ What is claimed is:] [1.] A method for making ceramic honeycomb comprising:selecting a wave shaped adhesive pattern;applying an adhesive in the selected wave shaped adhesive pattern to minor portions of node regions of a plurality of ceramic fabrics so that major portions of the node regions are free of said adhesive;stacking the ceramic fabrics so the adhesive bonds adjacent fabrics to one another at nodes defined by said adhesive to create a fabric stack;expanding the fabric stack;impregnating the expanded fabric stack with a ceramic matrix; andheating the impregnated fabric stack to a temperature sufficiently high to create a ceramic honeycomb.