Microstructure, mechanical properties, electrical resistivity, and corrosion behavior of (AlCr)x(HfMoNbZr)1-x films

Kang, Jianxiong; Líu, Hao; Du, Hao; Shi, Jie; Wang, Linlin; Yang, Liuquan; Dai, Houfu

doi:10.1016/j.apsusc.2023.157368

Cited by 9 publications

(3 citation statements)

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“…From the above literature review, high-entropy alloy nitride coatings show promising potential as protective coatings for cutting tools, forming dies, and other high-temperature applications due to their extraordinarily high hardness, mechanical properties, and hightemperature tribological behaviors. Since the AlCrN coatings exhibit very high hardness and good wear resistance [27,28], adding AlCr alloying elements into coatings was explored [29][30][31]. Kang and coworkers [29] studied the influence of AlCr contents on the microstructure, mechanical properties, electrical resistivity, and corrosion behavior of (AlCr)x(HfMoNbZr)1-x thin films.…”

Section: Introductionmentioning

confidence: 99%

“…Since the AlCrN coatings exhibit very high hardness and good wear resistance [27,28], adding AlCr alloying elements into coatings was explored [29][30][31]. Kang and coworkers [29] studied the influence of AlCr contents on the microstructure, mechanical properties, electrical resistivity, and corrosion behavior of (AlCr)x(HfMoNbZr)1-x thin films. They found that the film hardness increased with increasing AlCr content [29].…”

Section: Introductionmentioning

confidence: 99%

“…Kang and coworkers [29] studied the influence of AlCr contents on the microstructure, mechanical properties, electrical resistivity, and corrosion behavior of (AlCr)x(HfMoNbZr)1-x thin films. They found that the film hardness increased with increasing AlCr content [29]. Meanwhile, Tang et al discussed the effect of AlCr content on the mechanical properties of AlTiCrN coatings grown with HiPIMS and noted that the hardness decreased with increasing AlCr content [30].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Corrosion Resistance of AlCrNbSiTiN High Entropy Alloy Nitride Coatings

Lou,

Lin,

Lee

2023

Coatings

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High-entropy alloy (HEA) nitride coatings have been extensively studied due to their desirable properties of high hardness, thermal stability, and corrosion resistance. Among HEA nitride thin films, the AlCrNbSiTiN coatings exhibit very good hardness, high temperature strength, and thermal stability. In this study, six AlCrNbSiTiN HEA coatings with different Al and Cr contents were synthesized using a co-sputtering system with a high-power impulse magnetron sputtering (HiPIMS) power connected to an Al70Cr30 target and a mid-frequency power connected with an Al4Cr2NbSiTi2 high-entropy alloy target. The input power of the Al70Cr30 target was adjusted to obtain AlCrNbSiTiN coatings with different Al and Cr contents. It is observed that the sum of the Al and Cr contents and the (Al + Cr)/(Al + Cr + Nb + Si + Ti) ratio of the AlCrNbSiTiN coatings increased from 59 to 91 at.% when the input power of the Al70Cr30 target increased from 700 W to 1100 W. The single NaCl-type (B1) face-centered cubic (FCC) phase was observed for each coating. The hardness of the coatings increased from 21.2 to 28.2 GPa with increasing Al and Cr contents due to the grain size refinement effect brought by the increasing HiPIMS power. The wear depth and wear rate of the coatings sequentially decreased from 544 to 24 nm and from 2.79 × 10−5 to 2.63 × 10−7 mm3N−1m−1, respectively. Although the adhesion slowly decreased with increasing Al and Cr contents and the hardness of the coating, there was adequate adhesion with a minimum LC3 critical load of 36.1 N. The corrosion resistance of 304 stainless steel in a 3.5 wt.% NaCl aqueous solution was improved by deposition of the AlCrNbSiTiN coating. In this work, the high-entropy AlCrNbSiTiN nitride coating with a (Al + Cr)/(Al + Cr + Nb + Si + Ti) ratio of 91% exhibited excellent surface roughness, the highest hardness of 28.2 GPa, adequate adhesion, and the lowest wear rate of 2.63 × 10−7 mm3N−1m−1 due to its grain refinement effect by the ion bombardment generated with HiPIMS.

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