Journal ArticleDOI
Characteristics of (TiAlCrNbY)C films deposited by reactive magnetron sputtering
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In this paper, a multi-component carbide coatings were prepared by reactive co-sputtering of Ti, Al, Cr, Nb and Y targets in an Ar + CH 4 atmosphere, and the films were investigated for elemental and phase composition, chemical binding state, texture, morphology, residual stress, roughness, hardness, friction and wear using X-ray photoelectron spectroscopy (XPS), XRD, atomic force microscopy (AFM), surface profilometry, hardness measurements and tribological tests.Abstract:
(TiAlCrNbY)C multi-component carbide coatings were prepared by reactive co-sputtering of Ti, Al, Cr, Nb and Y targets in an Ar + CH 4 atmosphere. The films were investigated for elemental and phase composition, chemical binding state, texture, morphology, residual stress, roughness, hardness, friction and wear using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), atomic force microscopy (AFM), surface profilometry, hardness measurements, and tribological tests. The metals in the carbide films were found in an almost equiatomic ratio, whereas the carbon content varied from about 46 to 82 at.%. For film composition close to stoichiometry, a single fcc solid solution phase with an (111) preferred orientation was detected. The coatings with higher carbon concentrations (69–82 at.%) exhibited an amorphous structure. Fine grained and smooth surface morphologies were observed by AFM. While the metallic film exhibited a low tensile stress (∼ 0.240 GPa), the carbides coatings were subjected to compressive stress, with values (from 0.200 to 1.950 GPa) strongly depending on CH 4 flow rate. The hardness values (13–23 GPa) were found to be lower than those usually reported for binary carbides (30–35 GPa), while the dry friction coefficients were in the range 0.05–0.25.read more
Citations
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A critical review of high entropy alloys and related concepts
Daniel B. Miracle,Oleg N. Senkov +1 more
TL;DR: High entropy alloys (HEAs) are barely 12 years old as discussed by the authors, and the field has stimulated new ideas and inspired the exploration of the vast composition space offered by multi-principal element alloys.
Journal ArticleDOI
Microstructures and properties of high-entropy alloy films and coatings: a review
Wei Li,Ping Liu,Peter K. Liaw +2 more
TL;DR: In the past 14 years, as a branch of high-entropy alloy (HEA) materials, HEA films and coatings have exhibited the attractive and unique properties, relative to the conventional film and coating ma...
Journal ArticleDOI
Nanostructured multi-element (TiZrNbHfTa)N and (TiZrNbHfTa)C hard coatings
TL;DR: Multi-element (TiZrNbHfTa)N and multi-element C coatings were deposited on C45 and M2 steel substrates by co-sputtering of pure metallic Ti, Zr, Nb, Hf and Ta targets in Ar+N2 and Ar+CH4 reactive atmospheres.
Journal ArticleDOI
High-entropy ceramics: Review of principles, production and applications
TL;DR: High-entropy ceramics with five or more cations have recently attracted significant attention due to their superior properties for various structural and functional applications as mentioned in this paper, and significant efforts were started to increase the entropy, minimize the Gibbs free energy, and achieve stable single-phase high-entropically stable ceramic films.
Journal ArticleDOI
Characterization of multi-principal-element (TiZrNbHfTa)N and (TiZrNbHfTa)C coatings for biomedical applications.
TL;DR: Cell viability tests proved that the osteoblast cells were adherent to the coated substrates, and a very high percentage of live cells were observed on sample surfaces, after 72 h incubation time.
References
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Journal ArticleDOI
Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
Jien-Wei Yeh,Swe-Kai Chen,Su-Jien Lin,Jon-Yiew Gan,Tsung-Shune Chin,Tsung-Shune Chin,Tao-Tsung Shun,Chun-Huei Tsau,Shou-Yi Chang +8 more
TL;DR: A new approach for the design of alloys is presented in this paper, where high-entropy alloys with multi-principal elements were synthesized using well-developed processing technologies.
Journal ArticleDOI
Single layer and multilayer wear resistant coatings of (Ti,Al)N: a review
S PalDey,Seetharama C. Deevi +1 more
TL;DR: In this paper, the status of (Ti,Al)N based coatings obtained by various physical vapor deposition (PVD) techniques and compare their properties is discussed and compared with coatings such as TiN, Ti(C,N) and (TiZr)N.
Journal ArticleDOI
Multi-Principal-Element Alloys with Improved Oxidation and Wear Resistance for Thermal Spray Coating
TL;DR: In this paper, multi-principal element alloy coatings of Al-Si alloys were prepared by a plasma spray method and they not only exhibited a good oxidation resistance up to 1000 °C, but also possessed an excellent abrasive wear resistance approximately two times higher than those of SUJ2 and SKD61.
Journal ArticleDOI
Wear resistance and high-temperature compression strength of Fcc CuCoNiCrAl0.5Fe alloy with boron addition
TL;DR: In this paper, the wear resistance and high-temperature compression strength of CuCoNiCrAl0.5Fe alloy with various amounts of boron addition were discussed.
Journal ArticleDOI
Nanostructured nitride films of multi-element high-entropy alloys by reactive DC sputtering
TL;DR: In this paper, the hysteresis curves of the two high-entropy alloys in reactive sputtering are quite different in comparison to those of elements or simple alloys.