Results 31 to 40 of about 972,759 (203)

Strong elemental fractionation of Zr–Hf and Nb–Ta across the Pacific Ocean [PDF]

, 2011
Understanding the circulation of water masses in the world’s oceans is critical to our knowledge of the Earth’s climate system. Trace elements and their isotopes have been explored as tracers for the movement of water masses1.
Yoshiki , Sohrin, Firdaus, M. Lutfi, Kazuhiro , Norisuye, Tomoharu, Minami   +3 more
core   +2 more sources

Pt-induced atomic-level tailoring towards paracrystalline high-entropy alloy

Nature Communications, 2023
Paracrystalline state is still challenging to reach in alloy systems in a controlled manner. Here, the authors present an atomic-level tailoring route to create paracrystalline Zr-Nb-Hf-Ta-Mo high-entropy alloy through local amorphization induced by ...
Xingjia He, Yu Zhang, Xinlei Gu, Jiangwei Wang, Jinlei Qi, Jun Hao, Longpeng Wang, Hao Huang, Mao Wen, Kan Zhang, Weitao Zheng   +10 more
doaj   +1 more source

The Effect of Scandium on the Structure, Microstructure and Superconductivity of Equimolar Sc-Hf-Nb-Ta-Ti-Zr Refractory High-Entropy Alloys [PDF]

, 2022
In this study, we investigate the scandium-containing Sc-Hf-Nb-Ta-Ti-Zr system of refractory high-entropy alloys (HEAs). Using the arc-melting method, we synthesized nine equimolar alloys (five 4-, three 5-and one 6-component), with all of them ...
Krnel, Mitja, Meden, A., Jelen, Andreja, Luzar, Jože, Meden, A.,, Krnel, Mitja,, Koželj, P., Jelen, A.,, Dolinšek, J.,, Wencka, Magdalena, Magdalena Wencka, Luzar, J.,, Qiang Hu, Koželj, P.,, Hu, Qiang, Jelen, A., Andreja Jelen, Anton Meden, Guo, Sheng, Sheng Guo, Vrtnik, S., Darja Gačnik, Dolinšek, J., Mitja Krnel, Guo, Sheng,, Luzar, J., Vrtnik, S.,, Hu, Q.,, Primož Koželj, Stanislav Vrtnik, Jože Luzar, Wencka, Magdalena,, Meden, Anton, Koželj, Primož, Gačnik, Darja,, Gačnik, Darja, Janez Dolinšek, Hu, Q., Dolinšek, Janez, Vrtnik, Stanislav   +39 more
core   +1 more source

In-situ formation mechanism of a superlattice (Ti,Zr,Hf,Nb,Ta)C high-entropy carbide via reactive melt infiltration

Materials & Design
High-entropy carbide ceramics are promising ultrahigh-temperature materials due to their excellent thermal stability and mechanical properties. However, their synthesis typically relies on energy-intensive techniques such as high temperatures and ...
Yuyu Song, Yejie Cao, Yuran Xia, Yansong Liu, Yongsheng Liu   +4 more
doaj   +1 more source

Thermal Stability of Microstructure of High-Entropy Alloys Based on Refractory Metals Hf, Nb, Ta, Ti, V, and Zr

Metals, 2022
In the present work, a series of high-entropy alloys based on refractory metals Hf, Nb, Ta, Ti, V, and Zr with various compositions have been systematically investigated.
Tomáš Vlasák, Jakub Čížek, Oksana Melikhova, František Lukáč, Dalibor Preisler, Miloš Janeček, Petr Harcuba, Mariia Zimina, Ondřej Srba   +8 more
doaj   +1 more source

Geochemical Compositions of Size‐Fractioned Sediment Samples From the Yangtze and Yellow Rivers: Implications for Chemical Weathering, Fractionation Behavior of Provenance Tracers, and Sources of Radial Sand Ridges

Geochemistry, Geophysics, Geosystems, 2023
River sediments are valuable archives of the environmental conditions within their catchments. The Yangtze and Yellow Rivers are the most active fluvial systems for sediment transport in East Asia, and they are regarded as potential sediment sources for ...
Chao Wu, Yang Wu, Xiaoxiao Yu, Yiwei Chen, Weiguo Zhang, Jie Liu, Gangjian Wei   +6 more
doaj   +1 more source

Mechanical and electronic properties of new stable transition metal carbonitrides

Results in Physics, 2023
Using first-principles calculations, we conducted a comprehensive investigation into the crystal structures, mechanical properties, and electronic structures of Ta4CN3 and Ta2CN compounds through the substitution of Ta atoms with transition metals (Cr ...
Jing Luo, Qun Wei, Xiaofei Jia, Meiguang Zhang, Zhenhua Wu, Xuanmin Zhu   +5 more
doaj   +1 more source

Developing a variable charge potential for Hf/Nb/Ta/Ti/Zr/O system via machine learning global optimization

Materials & Design, 2023
Despite widespread attentions on the HfNbTaTiZr refractory high-entropy alloy (RHEA) owing to various exceptional properties, insights into nanostructure-property relations are severely hindered by the lack of reliable interatomic potentials in atomistic
Yihan Wu, Wenshan Yu, Shengping Shen
doaj   +1 more source

Non‐Additive Criteria Assessment in Sustainability Evaluation of High Entropy Alloys: A Toxicity‐Weighted Framework

Advanced Engineering Materials, EarlyView.
Sustainability assessment requires methodologies that appropriately distinguish between additive and non‐additive material properties. A toxicity‐weighted scoring system is developed and applied that accounts for the disproportionate influence of highly toxic constituents through nonlinear weighting functions, providing more realistic estimates than ...
Seth Mehalic, Oladele A. Ogunseitan, Julie M. Schoenung   +2 more
wiley   +1 more source

Computational screening study of double transition metal carbonitrides M′2M″CNO2-MXene as catalysts for hydrogen evolution reaction

npj Computational Materials, 2021
Two-dimensional (2D) transition metal carbonitrides (MXene) have attracted growing interest in electrocatalytic hydrogen production due to its structural and electronic properties.
Zhoulan Zeng, Xingzhu Chen, Kaiyi Weng, Yang Wu, Peng Zhang, Jizhou Jiang, Neng Li   +6 more
doaj   +1 more source