AVS 59th Annual International Symposium and Exhibition
    Applied Surface Science Monday Sessions
       Session AS-MoA

Invited Paper AS-MoA6
Surface Diffusion of Carbon on Metals and Complications for Auger Spectroscopy of Carburized Steels

Monday, October 29, 2012, 3:40 pm, Room 20

Session: Quantitative Surface Chemical Analysis, Technique Development, and Data Interpretation - Part 2
Presenter: W.D. Jennings, Case Western Reserve University
Correspondent: Click to Email
The development of low temperature colossal super saturation of stainless steels produces carburized case hardened materials with superior corrosion resistance and mechanical properties. Auger characterization of these materials requires line scan analysis of steel cases that contain substantial carbon concentration. Long acquisition times and surface migration of contaminating carbon complicate the measurement process, and lead to the need for continuous ion sputtering during acquisition of Auger spectra. This process in turn leads to the further complication of differential sputtering effects which alter the apparent composition of the material. This study details the corrections to the Auger relative sensitivity factors needed to achieve accurate characterization of these materials. Fundamental measurements of carbon surface diffusion are also presented.