|
|||||
|
|
Investigation of microstructure and mechanical properties of multi-layer Cr/Cr2O3 coatings |
|
| Authors: | Xiaolu Pang Fei Luo Alexandr A. Levin |
| Affiliation: | a Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China b Nanotechnology and Nanomanufacturing Research Center, University of South Florida, Tampa FL 33620, USA c Institut für Strukturphysik, Technische Universität Dresden, 01062 Dresden, Germany d Department of Mechanical Engineering, University of South Florida, Tampa FL 33620, USA |
| Abstract: | Single and multi-layer Cr/Cr2O3 coatings were deposited by reactive magnetron sputtering with the total thickness of 7 μm on steel substrates. X-ray diffraction analysis showed that single and multi-layer Cr/Cr2O3 coatings have different preferred crystal orientations. Columnar microstructure was detected by transmission electron microscopy both in metal chromium and ceramic chromium oxide layers. Grain size increased with the coating thickness. The value of single and multi-layer coating's fracture toughness is between 4 and 6 MPa·m1/2 measured with the Berkovich tip indentation, and it is between 2.8 and 3.9 MPa·m1/2 when measured with the Vickers indenter. The adhesion is about 192.1 and 246.7 J/m2 for single and multi-layer coatings, respectively. |
| Keywords: | Chromium oxide Multi-layer Microstructure Fracture toughness Adhesion |
| 本文献已被 ScienceDirect 等数据库收录！ | |