Results 161 to 170 of about 602 (238)

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

open access: yesAdvanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir   +5 more
wiley   +1 more source

胺类萃取Cr,Mo,W,V等过渡元素规律的研究

open access: yes, 1982
胺类可从近于中性的水溶液中按溶剂化历程主要靠 H—键形成分子缔合物萃取Cr(Ⅵ),Mo(Ⅵ),W(Ⅵ),V(Ⅴ)等金属.根据与氮相连结的活性氢原子的多寡与有无,讨论了伯、仲、叔胺类溶剂化能力的强弱.伯胺分子中含有两个活性氢原子,因此它的溶剂化能力高于仲胺和叔胺.本文所研究的溶剂化历程与一般使用胺盐萃取的离子交换历程其规律完全不同.水溶液中过渡元素含氧酸阴离子在不同的平衡 pH 下具有不同聚合形态.本文根据电荷密度及比电荷概念预测其疏水性 ...
陈家镛, 于淑秋
core  

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal   +4 more
wiley   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar   +7 more
wiley   +1 more source

Simultaneous Determination of Chromium(Ⅲ) and Chromium(Ⅵ) by High Performance Liquid Chromatography(HPLC)

open access: yes, 1994
Analytic methods for Cr(VI) level in industrial hygienic field were suggested by the National Institute for Occupational Safety and Health(NIOSH method 7600, 7604). There were growing needs for measurement of Cr(III} and Cr(VI) levels simultaneously. Two
노재훈
core  

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