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Anal Bioanal Chem. 2011 May;400(3):659-63. doi: 10.1007/s00216-011-4769-x. Epub 2011 Mar 2.

Oxygen diffusion in grain boundaries: a ToF-SIMS investigation on hot-rolled steel sheets.

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  • 1Institute of Chemical Technologies and Analytics, Vienna University of Technology, Austria.

Abstract

A study of grain boundary diffusion of oxygen in hot-rolled steel sheets is carried out by means of time-of-flight secondary-ion-mass-spectrometry (ToF-SIMS). This involves polishing of the sample surface prior to the oxygen exposure. A nickel layer deposited after exposure ensures a homogeneous extraction field for ToF-SIMS measurements at the Ni-steel interface. The sample is bevelled at an angle of 11.5° to spread up the diffusion pathway by a factor of 5. The oxygen distribution is then acquired via ToF-SIMS in imaging mode from which diffusion parameters are calculated according to the Whipple-Le Claire's approach.

PMID:
21360033
[PubMed]
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