Results 21 to 30 of about 9,563 (223)

Synergistic Effect of High Strength‐Grain Refinement and Suppression of Al6Fe Phase Coarsening in Additively Manufactured Al‐Fe‐Sc‐Zr Alloys via Mg Addition

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT To meet the demand for high‐performance lightweight heat‐resistant materials in aerospace and automotive applications, a novel Al‐Fe‐Sc‐Zr heat‐resistant aluminum alloy was fabricated by laser powder bed fusion (L‐PBF). The effects of Mg content (1 wt%, 3 wt%, 5 wt%, and 7 wt%) on formability, microstructure, mechanical properties, and thermal
Xinyu Du   +6 more
wiley   +1 more source

冀东青龙-双山子地区新太古代高镁安山岩-镁闪长岩锆石U-Pb年代学、地球化学及大地构造意义

open access: yes, 2019
冀东地区位于华北克拉通北缘,学术界对该地区新太古代岩浆作用的成因模式及构造背景一直存在争议,因此对冀东青龙-双山子地区的新太古代变质表壳岩及侵入岩进行了系统的同位素年代学及岩石地球化学研究.锆石LA-MC-ICP-MS U-Pb年代学结果显示变安山岩的形成时代为2 576 Ma,辉长闪长岩-英云闪长岩-石英闪长岩的侵入时代为2 484~2 535 Ma.岩石地球化学特征显示,较早期的变安山岩部分属高镁安山岩类,源自俯冲板片脱水流体交代地幔楔的部分熔融;而稍晚的侵入岩类为具有埃达克质岩石特征的镁闪长岩类 ...
Qing-Song Chang   +9 more
semanticscholar   +1 more source

Um é pouco, dois é bom, três é demais

open access: yesOpiniães, 2015
Contos.
openaire   +2 more sources

Two‐Dimensional Catalysts for Enhanced Hydrogen Storage in Magnesium Hydride: Materials, Mechanisms, and Future Perspectives

open access: yesRare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT Magnesium hydride (MgH2) is a promising solid‐state hydrogen storage material due to its high gravimetric capacity and excellent reversibility. However, its practical application is hindered by high thermodynamic stability and sluggish reaction kinetics.
Xingyang Chen   +6 more
wiley   +1 more source

镁盐对印染废水脱色处理研究

open access: yesGongye shui chuli, 2002
用镁盐对印染工业酸性染料和混合活性染料废水脱色处理。考察了 pH值和镁盐添加量等对脱色效果的影响, 同时将镁盐和亚铁盐的脱色效果进行了比较。实验结果表明 :镁盐具有良好的脱色效果, 在镁盐添加量为 6 0 0mg/L, pH值 11.0~ 11.5的条件下, 脱色率达 91%以上, 说明镁盐是一种安全、无毒、无害的“环境友好型”绿色水处理剂。
路平, 王敏娟
doaj   +2 more sources

Modulating Hierarchical Microstructure to Enhance Strength–Ductility Synergy in an Additively Manufactured Zinc‐Magnesium Alloy via Static Magnetic Field

open access: yesRare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT Additive manufacturing of zinc‐magnesium (Zn‐Mg) alloys via laser powder bed fusion (LPBF) has gained significant recognition as a promising candidate for bone repair. However, the presence of coarse yet brittle eutectic phases in the fabricated Zn‐Mg alloys tends to induce premature stress concentration and resultant fracture during ...
Zhi Dong   +10 more
wiley   +1 more source

Doping‐Engineered Modulation of Oxygen Vacancy Formation Energy in Gallium Oxide for High‐Performance Solar‐Blind UV Photodetectors

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Solar‐blind ultraviolet (UV) photodetectors (SBPDs) play a critical role in applications including UV communication and fire warning systems. Gallium oxide (Ga2O3) has emerged as a promising material due to its wide bandgap and low cost, but suffers from high dark current and slow response speed caused by oxygen vacancy (VO) defects. This work
Yuhao Lin   +14 more
wiley   +1 more source

"É peixe ou não é?"

open access: yesRURIS (Campinas, Online), 2015
Este ensaio tem o objetivo de apresentar um fragmento da etnografia sobre o conhecimento naturalístico dos pescadores artesanais da Carrasqueira – pequeno povoado localizado na costa central portuguesa. O material etnográfico, produzido entre os anos de 2010 e 2011, expõe como os pescadores carrasqueiros denominam alguns dos seres que constituem a ...
openaire   +1 more source

Synergy Enhancement of Strength and Ductility of Mg‐Based Composites via In Situ Synthesized High‐Entropy Mg24(Y0.25Dy0.25Ho0.25Er0.25)5

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Mg‐based composites have been considered as promising structural materials for aerospace and automotive applications owing to their high specific strength and stiffness. However, their low room‐temperature ductility and absolute strength have limited their wide application.
Zhipeng Zhong   +4 more
wiley   +1 more source

镁铝碱式盐对铬(Ⅵ)吸附性能研究

open access: yesGongye shui chuli, 1996
进行了镁铝碱式盐和添加膨润土镁铝碱式盐吸附铬(Ⅵ)实验。实验证明镁铝碱式盐对铬(Ⅵ)有良好吸附性,添加一定数量膨润土能显着提高镁铝碱式盐吸附能力。
马福善, 张淑云, 曹汇川
doaj   +2 more sources

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