Preparation of copper-plated graphite powder, and the sintering behavior of its composite with copper
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To reduce the inhomogeneity from density difference in copper-graphite composite, which is a material system for DC-motorbrushes, copper is deposited on graphite surface via electroless plating, and then the copper-plated graphite mixed with purecopper powders is pressed and sintered to produce a final compact. Here, we identified the optimum electroless platingcondition for a large amount of copper deposition, and used it to prepare composite powders with pure copper. We comparedthe sintering behavior of the copper-plated graphite/copper composite powder with that of pure graphite/copper compositepowder. The results show that the copper-plated graphite/copper composite significantly enhanced the sinterability of thecomposite powder, along with the homogeneity of the sintered compact.
Abstract
To reduce the inhomogeneity from density difference in copper-graphite composite, which is a material system for DC-motorbrushes, copper is deposited on graphite surface via electroless plating, and then the copper-plated graphite mixed with purecopper powders is pressed and sintered to produce a final compact. Here, we identified the optimum electroless platingcondition for a large amount of copper deposition, and used it to prepare composite powders with pure copper. We comparedthe sintering behavior of the copper-plated graphite/copper composite powder with that of pure graphite/copper compositepowder. The results show that the copper-plated graphite/copper composite significantly enhanced the sinterability of thecomposite powder, along with the homogeneity of the sintered compact.
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