Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10672461 | Ultramicroscopy | 2015 | 6 Pages |
Abstract
The elemental distribution within a Ti-Si-Al-C-N coating grown by physical vapour deposition on a Cr-doped WC-Co cemented carbide substrate has been investigated by atom probe tomography. Special attention was paid to the coating/substrate interface region. The results indicated a diffusion of substrate binder phase elements into the Ti-N adhesion layer. The composition of this layer, and the Ti-Al-N interlayer present between the adhesion layer and the main Ti-Si-Al-C-N layer, appeared to be sub-stoichiometric. The analysis of the interlayer showed the presence of internal surfaces, possibly grain boundaries, depleted in Al. The composition of the main Ti-Al-Si-C-N layer varied periodically in the growth direction; layers enriched in Ti appeared with a periodicity of around 30Â nm. Laser pulsing resulted in a good mass resolution that made it possible to distinguish between N+ and Si2+ at 14Â Da.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
M. Thuvander, G. Ãstberg, M. Ahlgren, L.K.L. Falk,