GB1307254A - Methods of preparing fibrous metal materials and to materials prepared thereby - Google Patents

Abstract

1307254 Making fibrous metal materials OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES 9 Sept 1970 [23 Sept 1969] 43125/70 Headings C7D andC7X [Also in Division C1] A fibrous metal material is made by (a) heating a carbon skeleton at 700-1000‹C. in a neutral atmosphere (e.g. N 2 or A r ) containing a small amount (e. g. 1-5% by volume) of a normally liquid hydrocarbon (e.g. xylene) to join the C elements with conductive pyrolytic C bridges, (b) depositing a layer of metal or alloy with an electropositivity no more than 0À7, and (c) eliminating the skeleton by high temperature oxidation. In an alternative procedure the starting material is a C-containing body which is pyrolytically treated in a neutral atmosphere containing a small proportion of a hydrocarbon to leave a C residue the weight of which is at least 20% of the original body. The metal may be Ni, Co, Fe, Cu, Ag a alloys thereof, and may be applied by chemical plating or electrodeposition. The oxidation may be effected in an atmosphere of hydrogen containing water vapour for 5-20 hours at 800-1100‹C. or in air for 5-20 hours at 500-700‹C. The product may be sintered and deoxidized in hydrogen, or worked or treated with a metal vapour (e.g. Cu, Al, Ti, or alloy thereof) to increase the corrosion resistance thereof. The final product may be in the form of a film (which may be felted by paper-making techniques), felt, ribbon a fabric sheet.