Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8024166 | Surface and Coatings Technology | 2018 | 7 Pages |
Abstract
A multilayered Cr2O3/α-Al2O3 tritium permeation barrier coating containing a total of 10 nanoscale layers was prepared by radiofrequency magnetron sputtering without intentional heating. X-ray diffraction, Auger electron spectroscopy, and spherical aberration corrected transmission electron microscopy studies showed a multilayer structure and a Cr2O3 (104)/α-Al2O3 (104) coherent epitaxial growth. The effect of the Ar/O2 gas flow ratio (Î) on the structure and properties of the Cr2O3/Al2O3 multilayer coating were investigated. The results show that the crystallinity of the α-Al2O3 phase increased with decreasing Î. The mechanical properties, He+ ion irradiation tolerance, and corrosion resistance of the coating began to improve greatly when Î was decreased to 1:1. The coating with Îâ¯=â¯1:2 gave α-Al2O3 with the best properties, i.e., high nano-hardness (19.6â¯GPa), good corrosion resistance (icorrâ¯=â¯10â¯nA/cm2), and excellent irradiation resistance. The deuterium permeability of the Cr2O3/α-Al2O3 multilayer coating was also investigated.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
L. Wang, Y.Y. Wu, X.F. Luo, Z.E. Ning, J.H. Wang, J.J. Yang, Y.J. Feng, J.L. Liao, Y.Y. Yang, K.M. Feng, N. Liu, M. Gong,