Nano-mechanical properties of Cr-Zr-Nb-N medium entropy alloy films produced by reactive sputtering

Ataie, S.A.; Keshtmand, Razieh; Zamani-Meymian, Mohammad Reza

doi:10.1016/j.ijrmhm.2022.106006

Cited by 10 publications

(7 citation statements)

References 40 publications

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“…Moreover, there is a small peak at 1100 cm −1 indicating the Cr-N bonds for all samples. These peak locations are in good agreement with the related studies [24,45]. By enhancing the substrate bias voltage, it is evident that the intensities of Cr-N and Cr-O peaks increase to a slight extent, but the intensity of Nb-N bonds increases notably.…”

Section: Chemical Analysissupporting

confidence: 91%

“…The substrate temperature was fixed at 380 • C, and the working pressure was 3 × 10 −2 Torr. In addition, the other sputtering parameters are fixed and are similar to the previous work of the authors [24].…”

Section: Coatings Preparationmentioning

confidence: 99%

“…Hence, the average calculated area of macro-particles for 5 µm scale S50 images (such as the 2D AFM image) is 14%, and its total defect density is 31% (17% from Figure 5a and 14% from Figure 4a). In addition, from AFM results, one can extract surface fractal parameters by graphical software [24,33]. Table 2 summarizes the data of average roughness (Ra), root mean square roughness (Rq), skewness (Sk), kurtosis (Ku) and fractal parameter (D).…”

Section: Morphological Analysismentioning

confidence: 99%

“…Therefore, adding elements (such as Nb, Zr and Ti) is a better offer to enhance the hardness [20][21][22][23]. Although the authors studied Cr-Zr-Nb-N systems previously [24], the role of adding more elements (such as Ti) at the same time or oxygen percentage in Cr-N thin films has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Substrate Bias Voltage on Microstructure and Mechanical Properties of Cr-Nb-Ti-Zr-N-O Ceramic Thin Films Produced by Reactive Sputtering

et al. 2023

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Hard coatings are applied in various applications to protect substrates from wear and corrosion. In the present study, multi-element ceramic films are deposited by reactive sputtering. The level of substrate bias voltage (−50, −125 and −200 V) is changed to investigate the structural and mechanical properties of Cr-Nb-Ti-Zr-N thin films. Chemical analysis (using EDS, XRD and Raman spectroscopy) reveals that these thin films (with a high amount of oxygen) are composed of a nanocomposite phase structure (amorphous and nano-crystalline phases). CrO2 and NbxN crystalline phases exist in an amorphous matrix in the coatings. By increasing the substrate voltage (from −50 to −200 V), the nitrogen content (from 30 to 40 at. %) increases, and CrxN crystalline phases are generated in S125 and S200. Morphological, topological and image analysis (employing FESEM and AFM) data show that the intermediate level of substrate bias voltage (sample S125) can produce a uniform surface with minimum defect density (15%). In addition, S125 has the minimum level of roughness (16.6 nm), skewness (0.2) and kurtosis (2.8). Therefore, the hardness, toughness and wear resistance (extracted from indentation and scratch tests) of this sample is maximum (H is 24.5 GPa and H/E is 0.107), while sample S50 shows complete fracture and delamination.

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Section: Chemical Analysissupporting

confidence: 91%

Section: Coatings Preparationmentioning

confidence: 99%

Section: Morphological Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Substrate Bias Voltage on Microstructure and Mechanical Properties of Cr-Nb-Ti-Zr-N-O Ceramic Thin Films Produced by Reactive Sputtering

et al. 2023

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“…These HEA have been investigated for, e.g., their mechanical (see Refs. [21][22][23][24]), catalytic [25][26][27][28], photocatalytic [29][30][31][32], and refractory [33][34][35][36] properties. To date, over 350 reviews have been published on HEAs various properties [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

2022

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Thermoelectric materials have attracted extensive attention because they can directly convert waste heat into electric energy. As a brand-new method of alloying, high-entropy alloys (HEAs) have attracted much attention in the fields of materials science and engineering. Recent researches have found that HEAs could be potentially good thermoelectric (TE) materials. In this study, special quasi-random structures (SQS) of PbSnTeSe high-entropy alloys consisting of 64 atoms have been generated. The thermoelectric transport properties of the highest-entropy PbSnTeSe-optimized structure were investigated by combining calculations from first-principles density-functional theory and on-the-fly machine learning with the semiclassical Boltzmann transport theory and Green–Kubo theory. The results demonstrate that PbSnTeSe HEA has a very low lattice thermal conductivity. The electrical conductivity, thermal electronic conductivity and Seebeck coefficient have been evaluated for both n-type and p-type doping. N-type PbSnTeSe exhibits better power factor (PF = S2σ) than p-type PbSnTeSe because of larger electrical conductivity for n-type doping. Despite high electrical thermal conductivities, the calculated ZT are satisfactory. The maximum ZT (about 1.1) is found at 500 K for n-type doping. These results confirm that PbSnTeSe HEA is a promising thermoelectric material.

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Effect of YSZ Particle Size and Content on Microstructure, Mechanical and Tribological Properties of (CoCrFeNiAl)1−x(YSZ)x High Entropy Alloy Composites

Ghanbariha,

Farvizi,

Ataie

et al. 2024

Met. Mater. Int.

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Nano-mechanical properties of Cr-Zr-Nb-N medium entropy alloy films produced by reactive sputtering

Cited by 10 publications

References 40 publications

Effect of Substrate Bias Voltage on Microstructure and Mechanical Properties of Cr-Nb-Ti-Zr-N-O Ceramic Thin Films Produced by Reactive Sputtering

Effect of Substrate Bias Voltage on Microstructure and Mechanical Properties of Cr-Nb-Ti-Zr-N-O Ceramic Thin Films Produced by Reactive Sputtering

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

Effect of YSZ Particle Size and Content on Microstructure, Mechanical and Tribological Properties of (CoCrFeNiAl)1−x(YSZ)x High Entropy Alloy Composites

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