Abstract
The cause of inverse segregation in the Cu-Sn alloys is a problem still awaiting solution, although there have been a number of brief information on it. In this work, the dependence of absorbed gases in the Cu-Sn alloys on the inverse segregation was systematically investigated on the bases of morphologies of solidified structure and gas analysis. The alloys were molten under a controlled atmosphere and were solidified unidirectionally or bidirectionally. Melting in the reducing atmosphere caused stronger inverse segregation. Hydrogen gas had a strong effect on the inverse segregation. No relation was found between macroporosities and inverse segregation.
