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Type Angseryd, J.; Liu, F.; Andrén, H.-O.; Gerstl, S.S.A.; Thuvander, M.
  Publication Quantitative APT analysis of Ti(C,N) Volume Journal Article
Pages 2011
  Abstract Ultramicroscopy  
  Corporate Author Special Issue: 52nd International Field Emission Symposium  
Publisher 111  
Editor 6
  Summary Language 609-614 Series Editor Atom probe tomography; Apt; Ti(C,N); Quantification; Pcbn  
Abbreviated Series Title A specially produced Ti(C,N) standard material, with a known nominal composition, was investigated with laser assisted atom probe tomography. The occurrence of molecular ions and single/multiple events was found to be influenced by the laser pulse energy, and especially C related events were affected. Primarily two issues were considered when the composition of Ti(C,N) was determined. The first one is connected to detector efficiency, due to the detector dead-time. The second one is connected to peak overlap in the mass spectrum. A method is proposed for quantification of the C content in order to establish the C/N ratio. A correction was made to the major C peaks, C at 6 and 12 Da, with the 13C isotopes, at 6.5 and 13 Da, according to the known natural abundance. In addition, a correction of the peak at 24 Da, where C and Ti overlap, is proposed based on the occurrence of single/multiple events for respective element. The results were compared to the results from other techniques such as electron energy loss spectroscopy, chemical analysis and X-ray diffraction. After applying the corrections, atom probe tomography results were satisfactory. Furthermore, the content of dissolved O in Ti(C,N) was successfully quantified.
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0304-3991 no NU @ karnesky @ 11233
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