Results 31 to 40 of about 2,066 (185)

Hydrogenetic, Diagenetic and Hydrothermal Processes Forming Ferromanganese Crusts in the Canary Island Seamounts and Their Influence in the Metal Recovery Rate with Hydrometallurgical Methods [PDF]

open access: yes, 2019
Four pure hydrogenetic, mixed hydrogenetic-diagenetic and hydrogenetic-hydrothermal Fe-Mn Crusts from the Canary Islands Seamount Province have been studied by Micro X-Ray Diffraction, Raman and Fourier-transform infrared spectroscopy together with high ...
González, Francisco Javier   +11 more
core   +5 more sources

COMPOSITIONAL FEATURES AND AGE OF ALKALINE GRANITES OF THE INGUR MASSIF, WESTERN TRANS-BAIKAL AREA

open access: yesГеодинамика и тектонофизика, 2022
The Ingur alkaline granite massif and the associated Zr-Nb occurrence make up part of the largest Mongolian-Trans-Baikal alkaline granitoid provinces. The massif is composed of arfvedsonite, biotite, and alaskite granites. High content of HREE determines
M. V. Rampilova   +2 more
doaj   +1 more source

Comparing the Tribological Properties of the Coatings (Ti-Hf-Zr-V-Nb-Ta)N and (Ti-Hf-Zr-V-Nb-Ta)N + DLC [PDF]

open access: yesЖурнал нано- та електронної фізики, 2015
The paper compares the tribological characteristics of the coatings (Ti-Hf-Zr-V-Nb-Ta)N and (Ti-Hf-Zr-V-Nb-Ta)N + DLC obtained by means of vacuum-arc deposition method.
U.S. Nyemchenko   +4 more
doaj  

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

open access: yesnpj 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   +6 more
doaj   +1 more source

A method for locating ore bodies by geochemical indexes of pegmatite-type lithium deposits in the Ke'eryin area, western Sichuan, China

open access: yesDizhi lixue xuebao, 2022
The Ke'eryin area in Sichuan province is one of the large rare metal ore concentration areas in the Songpan–Garze metallogenic belt. Numerous granite pegmatite dikes spread around the Ke'eryin mass.
TANG Wenchun   +5 more
doaj   +1 more source

Nb- and Ta-doped (Hf,Zr,Ti)C multicomponent carbides with enhanced oxidation resistance at 2500 °C

open access: yesJournal of Advanced Ceramics
Enhancing oxidation resistance of multicomponent carbides above 2000 ℃ is critical for their thermal protection applications. For this purpose, novel Nb- and Ta-doped (Hf,Zr,Ti)C multicomponent carbides were designed to improve their oxidation resistance
Shiyan Chen   +7 more
doaj   +1 more source

Late Paleozoic tectonics of Southern Central Asian orogenic belt: Evidence from magmatic rocks in the northern Alxa, Northwest China

open access: yesFrontiers in Earth Science, 2023
Late Paleozoic magmatic rock outcrops are common in the Northern Alxa, Southern Central Asian Orogenic Belt (CAOB), which is a key area for understanding tectonic processes and defining the final closure time of the Paleo-Asian Ocean (PAO).
Er-Teng Wang   +8 more
doaj   +1 more source

Effect of Ti addition on the structural, thermodynamic, and elastic properties of $Ti_{x}(HfNbTaZr)_{(1-x)/4}$ alloys

open access: yes, 2023
The structure and thermodynamic properties of $Ti_{x}(HfNbTaZr)_{(1-x)/4}$ refractory highly entropy multicomponent alloys have been studied using a comprehensive Monte-Carlo Special Quasi-random Structure (MCSQS) realization of the disordered atomic ...
Al-Houcine, Marwa   +3 more
core  

Cobalt-rich Ferromanganese Crusts from the Southwest Canary IslandsSeamounts : Mineralogy and Geochemistry of Strategic and Critical Elements [PDF]

open access: yes, 2021
Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Geológicas, Departamento de Mineralogía y Petrología, leída el 27-07-2020Esta tesis doctoral titulada “Costras de Ferromanganeso ricas en cobalto de los Montes Submarinos al ...
Marino, Egidio
core   +1 more source

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