Activity Measurement for Surface Segregated Type 316 Stainless Steel by Mass Spectrometry and Auger Electron Spectroscopy

抄録

Vaporization of Type 316 stainless steel was studied by means of the mass spectrometer-Knudsen cell combination method together with the surface analysis by Auger electron spectroscopy. Anomalously large apparent activity coefficient was observed for chromium component, which was attributed to its surface segregation as determined by surface analysis. Surface analysis is concluded to be an important tool in the activity measurement of solid solution systems to be performed with the Knudsen effusion method.