期刊
SCRIPTA MATERIALIA
卷 127, 期 -, 页码 122-126出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.09.021
关键词
Titanium diboride; Thin films; Mechanical properties; Hardness
类别
资金
- European Research Council under the European Community Seventh Framework Program (FP7)/ERC [258509]
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [200900971]
- Swedish Research Council (VR) [621-2012-4425, 642-2013-8020, 621-2011-4417, 330-2014-6336, 622-2008-405, 621-2012-4359]
- SSF synergy grant FUNCASE
- Knut and Mice Wallenberg (KAW) Foundation [2015.0043]
Thin films of (Ti0.71Al0.29)B2+1.08 have been deposited by magnetron sputtering. Post-deposition annealing at 1000 degrees C for 1 h results in increased hardness and elastic modulus, from 32 to 37 GPa and from 436 to 461 GPa, respectively. In both as-deposited and annealed states the films adhere well to the substrate, indicating no considerable internal stress. The initial high hardness is attributed to a columnar microstructure consisting of crystalline (Ti,Al)B-2 columns separated by an amorphous B matrix. The observed age hardening corresponds to phase separation within the (Ti,Al)B-2 columns including the formation of Ti-deficient crystallites within the grain interior upon annealing. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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