Abstract
Metal-graphite materials must contain more than 30 vol.% C if they are to exhibit self-lubricating qualities. At graphite contents above 5–7 wt.% the metal particles become covered with graphite, and sintering then fails to impart high strength to the material. The existing methods of manufacture of materials of high graphite content introduce operations designed to suppress the spreading of the graphite during pressing. The most effective is the method of metal plating of graphite particles. Ideally, the graphite particle shape should approach spherical. Electrochemical deposition is the most promising of the the known methods of metal plating of powders. A study of the manufacture of copper-base metal-graphite materials has demonstrated the advantages of the use of electrochemically copper-plated graphite granules: the new 30 wt.% C material developed, GM-30, was found to have physicomechanical characteristics markedly superior to those of GO-30 material, also of 30 wt. %C content, produced bythe conventional technique.
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