High porosity three-dimensional structures made fro chromium based refractory alloys

摘要

High porosity three-dimensional structures are made from chromium based alloys. The invention concerns some metallic products and a method for their production that allows them to be produced in refractory alloys with a chromium base despite the complexity of their structure. The composition of the refractory alloy used is 80 to 75 % nickel, 14 to 17 % chromium and 6 to 9 % aluminum. The chromium is deposited by electrolysis by means of a bath able to be highly penetrating. The formation of the alloy with the layers of the other metallic constituents is obtained by thermal diffusion. The aluminum coating is brought about in the form of particles, by dipping, spraying or painting.