Quantitative Analyse von Bruchfl?chen mit AES bei der Untersuchung der Korngrenzensegregation von Schwefel in Nickel

Summary In a study of the grain boundary segregation of sulphur in nickel, the variation of sulphur enrichment on single boundary planes and on several boundaries as well as the distribution of sulphur on the two fracture surfaces of one specimen was determined. Two quantification procedures were applied, one using the APPH-ratio in the derivative spectrum and the other using the peak-to-background (P/B)-ratio in the E*[N(E)]-spectrum. Angle dependent measurements at grain boundary planes and at polished nickel surfaces show a lower sensitivity of the P/B-ratio to geometric and crystallographic effects, and the restricted region of applicability of the P/B ratio. The parallel use of both procedures for an optimum quantification, especially in studies on the structural dependence of grain boundary segregation, is proposed.