NIMTE OpenIR  > 2018专题
Thermal stability and oxidation resistance of V-alloyed TiAlN coatings
Xu, Yu X.; Chen, Li; Pei, Fei; Yue, Jian L.; Du, Yong
AbstractV-containing nitride coatings recently attract a wide range of research interests owing to their excellent tribo-logical properties. To evaluate their comprehensive properties, a comparative study on the intrinsic thermal stability and oxidation resistance of TiAIN and TiA1VN coatings are conducted here. Ti0.56Al0.44N, Ti0.50Al0.44V0.06N, and Ti0.40Al0.50V0.10N coatings, deposited by cathodic arc evaporation, exhibit a single-phase face-centered cubic structure with a hardness of 28.9-29.8 GPa. The V-containing coatings show a pronounced age-hardening upon annealing, which contributes to a hardness increase of 3.7 and 4.8 GPa at 800 degrees C for Ti0..50Al0.44V0.06N and Ti0.40Al0.50V0.10N, respectively, corresponding to 2.9 GPa for Ti0.56Al0.44N. Also, alloying with V retards the formation of wurtzite AIN upon annealing, especially in Ti0.50Al0.44V0.06N, and thus contributes to a higher hardness above 30 GPa even annealing at 1100 degrees C, while the hardness of Ti0.56Al0.44N significantly reduces to 27.8 +/- 0.6 GPa. However, alloying with V into TiAlN leads to an earlier formation of rutile TiO2 and also Ti-rich oxide top-layer on the outside surface instead of dense A1203, and thus degrades the oxidation resistance. When exposed to air at 700 degrees C for 10 h, the Ti0.50Al0.44V0.06N and Ti0.40Al0.50V0.10N coatings suffer from a severe oxidation, whereas only a compact oxide scale with a thickness of similar to 80 nm for Ti0.56Al0.44N is formed.
KeywordTi-al-n Self-organized Nanostructures Tribological Properties Elevated-temperatures Cutting Tools Performance Friction Behavior Vanadium System
Subject AreaMaterials Science
Document Type期刊论文
Recommended Citation
GB/T 7714
Xu, Yu X.,Chen, Li,Pei, Fei,et al. Thermal stability and oxidation resistance of V-alloyed TiAlN coatings[J]. CERAMICS INTERNATIONAL,2018,44(2):1705-1710.
APA Xu, Yu X.,Chen, Li,Pei, Fei,Yue, Jian L.,&Du, Yong.(2018).Thermal stability and oxidation resistance of V-alloyed TiAlN coatings.CERAMICS INTERNATIONAL,44(2),1705-1710.
MLA Xu, Yu X.,et al."Thermal stability and oxidation resistance of V-alloyed TiAlN coatings".CERAMICS INTERNATIONAL 44.2(2018):1705-1710.
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