Method for the producing of ceramic-metal composite materials by plasma spraying several layers of ceramic particles onto a base body and infiltrating molten metal into the pores of the ceramic material

摘要

A method for the production of ceramic-metal composite materials, in which ceramic materials are infiltrated with molten metal, includes building up a porous ceramic material of several layers by spraying on a base body, the thickness of the layers being between 10 and 150 microns with an average pore radius of between 100 and 1,000 nm, an open porosity of 5-14% and an overall porosity of 5-30%; and filling molten metal into the pore volume up to a residual pore volume of 0.1 to 10%, based on the initial porosity. In an alternate embodiment, a gradient structure of the ceramic is created by increasing or decreasing the particle size of the ceramic material while spraying layers. In the gradient structure, infiltration of molten metal is greatest in the layers sprayed with particles having the largest diameter.