Related references
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Article
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Dewen Niu et al.
Summary: High-entropy carbonitrides have excellent properties in friction and corrosion. The tribo-corrosion response of (CrNbTiAlV)CxNy coating was studied in 3.5 wt.% NaCl solution. The doping of carbon makes the coating structure dense. The coating with 40% carbon content has the best performance in terms of hardness, friction coefficient, and wear volume loss, effectively protecting the substrate in tribo-corrosion conditions.
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(2023)
Editorial Material
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Xiang Li et al.
Summary: The crystallization kinetics of Hf28Be18Ti17Zr17Cu7.5Ni12.5 high-entropy bulk metallic glass (HE-BMG) were investigated using differential scanning calorimetry (DSC) under non-isothermal and isothermal conditions. Three crystallization processes were observed in non-isothermal conditions, with the activation energies of peak crystallization temperatures determined. The dependence of local activation energy on crystallized volume fraction was analyzed using the Kissinger-Akahira-Sunose (KAS) method. The mathematical description of non-isothermal crystallization reaction was achieved using the Sestak-Berggren model. Under isothermal conditions, the incubation time and crystallization time decreased while the crystallization peak increased with increasing annealing temperature. The Avrami indices were all less than 2.5, indicating diffusion-controlled three-dimensional growth with decreasing nucleation rate in the crystallization of the glassy alloy.
THERMOCHIMICA ACTA
(2023)
Article
Materials Science, Ceramics
Tian-Zhe Tu et al.
Summary: The study reveals that HEZ ceramics show a graceful behavior to CMAS corrosion, much better than LZ ceramics. HEZ only suffered from dissolution and re-precipitation due to CMAS corrosion, while additional grain boundary corrosion existed in the LZ system. The fine-grained structure of the precipitated high-entropy apatite resulted in a reaction layer without cracks. Therefore, HEZ is a promising candidate for TBCs with extreme resistance to CMAS corrosion.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ching-Yin Lee et al.
Summary: In this study, (CrNbSiTiZr)CxNy films were deposited on various substrates via radio frequency magnetron sputtering and their properties were investigated. The film with a carbon content of 71 at% showed the lowest friction coefficient and wear rate, while increasing nitrogen content led to higher hardness values, oxidation resistances, friction coefficients, and wear rates. X-ray diffraction analysis indicated a shift in diffraction peaks with increased nitrogen content, suggesting an increase in the crystalline nitride phase.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Review
Materials Science, Ceramics
Dewei Ni et al.
Summary: Ultra-high temperature ceramics (UHTCs) have ultra-high melting points, outstanding mechanical properties, and ablation resistance at elevated temperatures, making them promising materials for structural applications in extreme environments such as rockets and hypersonic vehicles. The development of high-entropy UHTCs is an emerging direction for ultra-high temperature materials.
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(2022)
Review
Materials Science, Ceramics
Guangran Zhang et al.
Summary: High-entropy ceramics have been a recent focus of extensive research, with potential applications in various fields. Current studies mainly concentrate on the properties and fabrication methods of high-entropy ceramics.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
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Jingbo Gao et al.
Summary: In this study, a broad-spectrum antibacterial high-entropy alloy (HEA) was successfully fabricated using selective laser melting (SLM) and in-situ alloying. The SLM-fabricated HEA showed enhanced antibacterial ability compared to the conventionally fabricated HEA, making it suitable for potential applications requiring antibacterial properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Si-Chun Luo et al.
Summary: This study successfully prepared (Ti,Zr,Nb,Ta,Mo)C ceramics with high hardness and high toughness using a liquid-phase sintering process combined with a Co-based liquid-phase extrusion strategy. The densification temperature was significantly reduced to 1350 degrees C, and part of the Co-based liquid-phase was removed during the sintering, resulting in a lower Co content in the ceramic.
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(2022)
Article
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Chong Jing et al.
Summary: A method for the preparation of (Ti,V,Nb,Ta,Mo)(C,N) high-entropy carbonitride ceramics was established through carbothermal reduction-nitridation. The ceramics exhibited promising properties with regards to density, grain size, hardness, and fracture toughness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
R. Li et al.
Summary: A new strategy for preparing in situ W2C particle reinforced high-entropy ceramics has been proposed, which shows excellent mechanical properties. This technique has great potential in various applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Junqing Ma et al.
Summary: A novel high-entropy cermets material was prepared using a two-steps method, and its microstructure and mechanical properties were investigated. The results showed that the material had uniform composition, good denseness, and excellent mechanical properties.
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(2022)
Article
Materials Science, Ceramics
Yan Zhang et al.
Summary: Textured high-entropy boride ceramics were successfully fabricated for the first time using spark plasma sintering, with nearly single phase formation. The c-axis of boride grains aligned parallel to the SPS pressing direction, with grains growing along the a,b-axis to form platelet-like morphology. The ceramics exhibited a remarkably high Vickers' hardness and improved fracture toughness on the surface perpendicular to the SPS pressing direction due to oriented elongated grains.
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(2021)
Article
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Johannes Poetschke et al.
Summary: Dense, high-entropy carbide cobalt-bonded hardmetals with two different compositions were successfully manufactured by gas pressure sintering. The presence of some undissolved TaC and HfO2 in one of the compositions led to a reduced hardness to fracture toughness ratio. Measurements of magnetic saturation polarization showed marginal dissolution of the carbide-forming metal elements in the binder phase.
Article
Materials Science, Multidisciplinary
Zheng Peng et al.
Summary: The study found that optimizing nitrogen substitution in the sublattice can significantly improve the ablation resistance of high-entropy ceramics, reducing the ablation rate.
Article
Materials Science, Multidisciplinary
Ke-Han Wu et al.
Summary: A novel method of synthesizing single-phase compound carbide was proposed in this study, involving vacuum carbothermal reduction followed by calcium treatment. Various types of compound carbides were successfully synthesized at high temperatures, with the formation mechanism discussed and parameters proposed for predicting solid solution formation ability.
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