초록 ▼

The invention concerns a composite body consisting of a hard metal, cermet or ceramic substrate body and at least one layer of a mechanically resistant material, a ceramic substance, a diamond-like layer, amorphous carbon and/or hexagonal boron nitride. The invention also concerns a method of produc

The invention concerns a composite body consisting of a hard metal, cermet or ceramic substrate body and at least one layer of a mechanically resistant material, a ceramic substance, a diamond-like layer, amorphous carbon and/or hexagonal boron nitride. The invention also concerns a method of producing this composite body, wherein, when the green compact has been dewaxed, with its pores still open and whilst it continues to be heated as from a temperature of between 600.degree. C. and 1100.degree. C., it is acted upon by sublimable solids and/or reaction gases which are necessary for coating purposes. The temperature of the green compact is then further increased and the latter is fully compressed by sintering, before one or more layers of the above-mentioned type is/are applied.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of producing coated cermet, hard-metal or ceramic substrate bodies comprising the steps of:(a) precompressing a green compact from an initial powder mixture continuing a wax and powders sinterable to form a cermet, hard-metal or ceramic body;(b) dewaxing the gr

[ What is claimed is:] [1.]1. A method of producing coated cermet, hard-metal or ceramic substrate bodies comprising the steps of:(a) precompressing a green compact from an initial powder mixture continuing a wax and powders sinterable to form a cermet, hard-metal or ceramic body;(b) dewaxing the green compact;(c) after dewaxing and with the green compact still having open porosity, treating the green compact with reaction gases or sublimable solid materials capable of forming a coating on the body at a temperature between 600.degree. C. and 100.degree. C., then increasing the temperature of the green compact and completely densifying the green compact by sintering in a microwave field; and(d) thereafter applying at least one layer of hard material, ceramic, diamond-like layers, hexagonal boron nitride and/or amorphous carbon to the sintered body.