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Morphology of graphite solidified in Ni3Al/C intermetallic

Fraś E., Janas A., Olejnik E., Kawalec M., Kolbus A.

Archives of Foundry Engineering

2010

Vol. 10, iss. 1 spec.

169--174

The study presents the results of microstructural examinations of the Ni-Al-C alloy forming a natural Ni3Al/C composite, in which the precipitates of graphite are acting as a lubricating, slip phase. Different forms of graphite were described, starting with the fibrous shapes and ending in spheroidal forms, identical with the spheroidal graphite present in cast iron. The morphologies of graphite precipitates in the Ni3Al phase were compared to similar precipitates observed in ferrous alloys with high carbon content.