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Coatings 2017, 7(4), 46; doi:10.3390/coatings7040046

Internally Oxidized Ru–Zr Multilayer Coatings

Institute of Materials Engineering, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan
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Author to whom correspondence should be addressed.
Academic Editors: Tony Hughes and Russel Varley
Received: 20 February 2017 / Revised: 17 March 2017 / Accepted: 21 March 2017 / Published: 23 March 2017
(This article belongs to the Special Issue New Generation Coatings for Metals)
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Abstract

In this study, equiatomic Ru–Zr coatings were deposited on Si wafers at 400 °C by using direct current magnetron cosputtering. The plasma focused on the circular track of the substrate holder and the substrate holder rotated at speeds within 1–30 rpm, resulting in cyclical gradient concentration in the growth direction. The nanoindentation hardness levels of the as-deposited Ru–Zr coatings increased as the stacking periods of the cyclical gradient concentration decreased. After the coatings were annealed in a 1% O2–99% Ar atmosphere at 600 °C for 30 min, the internally oxidized coatings shifted their respective structures to a laminated structure, misaligned laminated structure, and nanocomposite, depending on their stacking periods. The effects of the stacking period of the cyclical gradient concentration on the mechanical properties and structural evolution of the annealed Ru–Zr coatings were investigated in this study. View Full-Text
Keywords: cyclical gradient concentration; internal oxidation; multilayer coating; nanocomposite coating cyclical gradient concentration; internal oxidation; multilayer coating; nanocomposite coating
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, Y.-I.; Lu, T.-S.; Zheng, Z.-T. Internally Oxidized Ru–Zr Multilayer Coatings. Coatings 2017, 7, 46.

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