title: Quantitative APT analysis of Ti(C,N).
abstract: 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 (13)C 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.
authors.affiliation: R&D Sandvik Tooling, SE-126 80 Stockholm, Sweden. jenny.angseryd@sandvik.com
authors.forename: J
authors.initials: J
authors.lastname: Angseryd
authors.forename: F
authors.initials: F
authors.lastname: Liu
authors.forename: H-O
authors.initials: HO
authors.lastname: Andrén
authors.forename: S S A
authors.initials: SS
authors.lastname: Gerstl
authors.forename: M
authors.initials: M
authors.lastname: Thuvander