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Science  13 Jul 1984:
Vol. 225, Issue 4658, pp. 200-202
DOI: 10.1126/science.225.4658.200


The segregation of sulfur in liquid cast iron was studied under conditions of microgravity on Spacelab 1. A rod of cast iron containing carbon, silicon, sulfur, and phosphorus was unidirectionally solidified at four different rates. The influence of sulfur on the graphite structure and the stability of an aluminum oxide skin deposited on the surface of the specimen were investigated.