Thermal Stability of Superhard Nitride Coatings from High-Entropy Multicomponent Ti-V-Zr-Nb-Hf Alloy

被引：53
作者：
Firstov, S. A. [1 ]
Gorban', V. F. [1 ]
Danilenko, N. I. [1 ]
Karpets, M. V. [1 ]
Andreev, A. A. [1 ]
Makarenko, E. S. [1 ]
机构：
[1] Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, Kiev, Ukraine
来源：
POWDER METALLURGY AND METAL CERAMICS | 2014年 / 52卷 / 9-10期
关键词：
high-entropy alloy; multicomponent; vacuum arc deposition; nitride coatings; X-ray diffraction;
D O I：
10.1007/s11106-014-9560-z
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nitride coatings with high hardness (60.0-65.0 GPa) are produced from a high-entropy multicomponent single-phase alloy containing five nitride-forming elements by vacuum arc deposition with application of pulsed implantation. These high values of hardness are characteristic of metals in the equiatomic alloy only in nanostructured state. The mechanical properties of the coatings annealed in the temperature range up to 1200 A degrees C are studied. It is established that the coatings are solid solutions of high-entropy nitride with fcc lattice. The vacuum coatings inherit the same type of crystal lattice as that of the target (bcc). The crystal lattice of high-entropy vacuum coatings is formed through the mechanism revealed in the cast alloys. The parameter of this lattice is close to that calculated by Vegard's rule.
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页码：560 / 566
页数：7
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