Enhanced hardness and age-hardening of TiAlN coatings through Ru-addition

Published on Mar 15, 2019in Scripta Materialia5.079
· DOI :10.1016/J.SCRIPTAMAT.2018.11.051
Hou K. Zou1
Estimated H-index: 1
(CAS: Chinese Academy of Sciences),
Li Chen27
Estimated H-index: 27
(CSU: Central South University)
+ 2 AuthorsYong Du56
Estimated H-index: 56
(CSU: Central South University)
Source
Abstract
Abstract Optimization of the properties of TiAlN coatings can be obtained by incorporation of the fourth elements. Here, the effect of noble metal Ru-addition on the structure and mechanical properties of TiAlN were studied by correlative experimental and theoretical means. Ab initio calculations indicate that Ru-addition decreases the solubility limit of AlN in TiAlN, which is verified by the experimental results. Additionally, the alloying with Ru into TiAlN tailors the thermal decomposition path into TiRuN and AlN and leads to a stronger age-hardening ability due to the larger mismatch.
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