Results 141 to 150 of about 972,759 (203)

The Wilson Cycle of the North Altyn Ocean: A Record of Subduction Initiation, Slab Rollback, and Final Closure

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The North Altyn ophiolitic belt was formed by the subduction–closure of the Altyn segment of the Proto–Tethys Ocean and recorded the accretion of Tarim to northern Gondwana, but the timing of initial subduction and detailed tectonic transition processes remain poorly constrained. This study reports the oldest Phanerozoic magmatic record of 537 
Long Chen, Jinlong Yao, Guochun Zhao, Yigui Han, Qian Liu, Donghai Zhang, Xijun Zhao, Hang Yang, Wei Li   +8 more
wiley   +1 more source

ГЕОХІМІЯ ГРОРУДИТІВ СХІДНОГО ПРИАЗОВ'Я

Вісник Київського національного університету імені Тараса Шевченка. Серія Геологія
У статті наведено результати геохімічних (ICP MS) досліджень дайкових аналогів лужних гранітів – грорудитів, що широко розповсюджені в Східному Приазов'ї.
О. Дубина, С. Кривдік
doaj  

Synthesis and Phase Evolution of Ultra-High Temperature MC-Type Carbides (M = Hf, Ta, Nb, Zr, Ti) via a Molecular Precursor Approach. [PDF]

Molecules
Zheng J, Peng H, Yang X, Liu Y, Yu Z.
europepmc   +1 more source

Core–Shell UHTCs as a Multiscale Design Paradigm for Extreme Environments

International Journal of Applied Ceramic Technology, Volume 23, Issue 5, October 2026.
ABSTRACT An integrated perspective on the performance of multiscale core–shell ultra‐high temperature ceramics (UHTCs) developed through a multiphase design strategy is here presented. The manuscript merges insights gained from studies on ZrB2 formulated and processed in the presence of a second transition metal compound based on W, Mo, or Ta ...
Laura Silvestroni
wiley   +1 more source

Enrichment of rhenium, uranium and tantalum in jurassic coal from yili basin, xinjiang - evidence from mineralogy and geochemistry. [PDF]

Sci Rep
Bai H, Wang W, Feng S, Wang M, Du Z, Li N, Li E, Ma L, Wang Z.   +8 more
europepmc   +1 more source

Synthesis of Dual Phase High Entropy Ultra‐High Temperature Ceramics From Different Carbon Sources

International Journal of Applied Ceramic Technology, Volume 23, Issue 5, October 2026.
ABSTRACT Dual phase (Hf,Nb,Ta,Ti,Zr)C‐(Hf,Nb,Ta,Ti,Zr)B2 ceramics were synthesized by boro‐carbothermal reduction of oxides with different carbon black powders. The starting materials reacted differently based on the particle size, surface area, and additives in the carbon powder.
Rubia Hassan, Gregory E. Hilmas, William G. Fahrenholtz   +2 more
wiley   +1 more source

Selective Extraction Process of Niobium and Tantalum from Tin Slag Derived from the Thermal Processing of Cassiterite. [PDF]

ACS Omega
Cheje Machaca DM, Juyo Salazar RB, Flores-Calla SS, Botelho Junior AB, Romano Espinosa DC, Tenório JAS.   +5 more
europepmc   +1 more source

Processing and properties of porous Ti-Nb-Ta-Zr alloy for biomedical applications using the powder metallurgy route

, 2011
Titanium alloys, due to their biocompatibility and low stiffness, are among the most studied of metallic implant materials. Whereas most titanium-based biomaterials are produced from prealloyed powders, in this work the authors have utilised elemental ...
Aris Nugroho (23553052), Ian Davies (2506012), Garry Leadbeater (23331439)   +2 more
core  

First‐Principles Investigation of the Transition‐Metal Carbide Crystal Morphology Control Through Alloying

Journal of the American Ceramic Society, Volume 109, Issue 10, October 2026.
Using computational methods, we tested a common, experimentally inspired hypothesis that some secondary metals induce cubic crystal growth in Group IVB and VB transition‐metal carbides (TMCs) by becoming surface alloys that change surface energetics.
Yuchen Huang, Olivia A. Graeve, Gregory B. Thompson, Christopher R. Weinberger   +3 more
wiley   +1 more source

First-principles prediction of yield strength and hardness in body-centered cubic refractory-based medium, high, and super high entropy alloys. [PDF]

RSC Adv
Hasan S, Adhikari P, Baral K, Ching WY.
europepmc   +1 more source