HIGH POROSITY CELLULAR THREE-DIMENSIONAL METALLIC STRUCTURE MADE OF REFRACTORY ALLOY AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain a high porosity cellular metallic structure by incorporating chromium into a refractory alloy, feeding the chromium by electrodeposition and specifying the three-dimensional structure as nonfired sponge state, nonwoven fabric or fabric.;SOLUTION: A chromium bath capable of obtaining a thick and uniform chromium-coated layer on the whole of the complicated surface of three- dimensional sponge, felt or fabric without closing pores desirably contains 250 /l chromic acid, 0.6 g/l sulfuric acid and 1% fluorosilicate, and, more desirably, the weight ratio of dichromate/chromic acid is 0.80 to 1.20. Aluminum being another essential component of the refractory alloy can be introduced by the dipping into slip suspensively contg. aluminum particles, spraying of the suspension of aluminum particles thereon or the applying of lacquer or paint contg. aluminum particles. By using the extremely fine particles of aluminum, the aluminum can easily be diffused into a metallic layer.;COPYRIGHT: (C)2000,JPO