Results 31 to 40 of about 24,741 (304)

Economic Regulation of Green Projects in Rare Earth Metal Mining [PDF]

open access: yesSHS Web of Conferences
The article discusses the development issues of rare earth metal deposits in the context of ensuring low-carbon development. The directions of the use of rare earth metals in renewable energy, including the production of solar panels and wind farms, are ...
Zhao Jier
doaj   +1 more source

Durability of alkali-activated materials with different C–S–H and N-A-S-H gels in acid and alkaline environment

open access: yesJournal of Materials Research and Technology, 2022
This work explores the durability of alkali-activated materials exposed to acidic and alkaline environments to analyze and evaluate their applications. The alkali-activated materials of metakaolin and metakaolin-mine tailings were immersed in solutions ...
Min Yang   +5 more
doaj   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

In Vivo Degradation Behavior of the Magnesium Alloy LANd442 in Rabbit Tibiae [PDF]

open access: yes, 2011
In former studies the magnesium alloy LAE442 showed promising in vivo degradation behavior and biocompatibility. However, reproducibility might be enhanced by replacement of the rare earth composition metal "E" by only a single rare earth element ...
Reifenrath, Janin   +11 more
core   +1 more source

The impact of Fe/Mn loads on the surface property of rare earth mineral

open access: yesMaterials Research Express, 2021
After using the mixed acid system to modify the surface of rare earth minerals, two transition metals (Fe and Mn) are loaded on the surface of the rare earth minerals by hydrothermal method to improve the NH _3 -SCR (Selective catalytic reduction ...
Yuze Bai   +5 more
doaj   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez   +5 more
wiley   +1 more source

Distribution and origin of major and trace elements (particularly REE, U and Th) into labile and residual phases in an acid soil profile (Vosges Mountains, France). [PDF]

open access: yes, 2004
A seven step sequential extraction procedure has been conducted on a podzolic soil profile from the Vosges Mountains in order to determine the ability of several elements to be released to the environment.
Aubert, Dominique   +2 more
core   +1 more source

Research progress on novel technology and mechanisms for the removal of oxygen impurities in rare-earth metals

open access: yes工程科学学报, 2018
Rare-earth metals play a very important role in the development of high-tech industries and the research of functional materials. The demand for high-purity rare-earth metals has rapidly increased because of the development of modern society and the rare-
FU Kai   +5 more
doaj   +1 more source

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

open access: yesAdvanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov   +4 more
wiley   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

open access: yesAdvanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee   +7 more
wiley   +1 more source

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