Studies on Copper-Glass Compacts

概要

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This investigation has been carried out in order to examine physical properties, mechanical properties, frictional properties and machinability of sintered copper-glass compacts. And it has been also examined if glass added in copper based compacts is useful as a lubricant to prevent a seizure. Specimens are made by being compacted at 4 ton/cm^2 for 2 min and being sintered at 850℃ for 60 min in a vacuum of about 10^<-2>mmHg. The results are as follows: The bending strength and the tensile strength of the copper-glass compact decrease with the increase of the glass content. The hardness increases up to 20% glass contents, but it becomes small again at 30%. and the amount of wear slightly increases and the seizure load decreases. Smaller amount of wear and larger seizure load are obtained by adding 10% glass contents to a copper-2 graphite compact. Furthermore glass in the compact melts, flows and covers all the surface of the compact. 1% glass in the copper compact makes the turned surface smoother as well, and the chips receive severe deformation.
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