Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1661671 | Surface and Coatings Technology | 2007 | 5 Pages |
Abstract
Multilayer coatings TiAlN/CrN were deposited by reactive magnetron sputtering. Thickness of the individual layers varied from 2 nm to 25 nm while the total thickness of the coating was â¼Â 5 μm. Coatings in cross-section were investigated using conventional, scanning and high-resolution transmission electron microscopy (TEM). Conventional TEM studies revealed a columnar microstructure. Chemical analysis of individual layers was preformed by high-angle annular dark-field scanning TEM (HAADF-STEM). The layers were well separated and no substantial intermixing was observed. High resolution TEM and electron diffraction studies showed that TiAlN and CrN layers are crystalline with B1 NaCl-type crystal structure. Coherent interfaces between TiAlN/CrN were observed, which can be attributed to a small mismatch between lattice parameters. In some areas between steel substrate (bcc-Fe) and the coating epitaxial relationship {001}Fe||{001}coating and <100>Fe||<110>coating was observed. In different areas of the coating TiAlN layers appeared to be less crystalline than CrN.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
M. Panjan, S. Å turm, P. Panjan, M. Äekada,