SNMS studies on the role of nitrogen in the oxidation behaviour of a TiAl-based intermetallic
Secondary neutral mass spectrometry (SNMS) was applied to analyse the scales formed on Ti-48Al-2Cr during isothermal oxidation at 800 C. SNMS allows the determination of the in-depth scale composition and an easy quantification of measured depth profiles for all elements. The samples were exposed to synthetic air as well as to a nitrogen free argon/oxygen mixture. The exposure time reached from a few minutes up to several hours. An approach is proposed for describing the oxidation mechanism with emphasis on the influence of nitrogen on the scale microstructure and the oxidation kinetics. The discussion of the results is backed up by thermogravimetric studies and transmission electron microscopy (TEM) investigations of the corrosion scales.
Bibliographic Reference: Paper presented: 6th Conference on Applications of Surface and Interface Analysis, Montreux (CH), October 9-13, 1995
Availability: Available from (1) as Paper EN 39398 ORA
Record Number: 199512063 / Last updated on: 1996-01-15
Original language: en
Available languages: en