|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Nitrogen Quantification in Steels by Atom Probe Tomography
||Raphaele Danoix, Mohamed Gouné, Andrius Martinavicius, Hugo Van Landeghem, Frederic Danoix
|On-Site Speaker (Planned)
Atom probe analysis is recognized as a key method for measuring compositon variations in materials down to the nanometer scale. Even if its mass resolution allows identification of of all chemical species, some uncertainties remain when two or more elements have common isobares or mass to charge ratio. In this situation, the mass resolution necessary for separating the contribution of each specy on mass spectum peaks is several thousands, significantly higher than that of the current instruments (about one thousand). One particularly important such case in physical metallurgy is nitrogen (14), silicon (28) and iron (56), making it particularly difficult to measure iron- or silicon-nitride compositions, or nitrogen content in the matrix of Si bearing steels. In this presentation, we propose several possible ways to, at least partly, overcome this problem, in particular by using 15N isotopicaly enriched nitrogen.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)