Results 31 to 40 of about 5,714 (305)
MORPHOLOGICAL AND COMPOSITIONAL FEATURES OF CHROMIAN SPINEL FROM MANTLE ULTRAMAFIC ROCKS OF THE NURALI MASSIF (SOUTH URALS) [PDF]
Минералогия, 2019 Accessory chromian spinels of lherzolites and dunites from a mantle section of the Nurali ophiolite massif are described in the paper. Lherzolites typically host anhedral chromian spinel grains associated with olivine, pyroxenes and plagioclase.
D.E. Saveliev
doaj +1 more source
Spectroscopic Characteristics and Coloring Mechanisms of Different Colored Spinels from Myanmar
Crystals, 2023 Spinel is a common gemstone that has attracted the attention of gemologists worldwide because of its high refractive index, rich colors and brilliant hues. Myanmar is an important source of spinel. The present paper provides a systematic characterization
Lei Zhang, Kui He, Qingfeng Guo
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Al-spinels in primitive arc volcanics
, 1995 Al-rich spinels (100Cr/(Cr + Al) 50 wt%) are common in alpine peridotites, both terrestrial and lunar mafic and ultramafic cumulates, and in certain metamorphic rocks, but they are apparently rare in terrestrial volcanic rocks.
Gasparon, M +4 more
core +1 more source
, 2023 Accurate determination of the structural disorder (i.e., cation misplacement, anionic and cationic vacancies, and reduced cations) of spinels is crucial to understanding the properties of this technologically attractive sub-family of ceramics, but it is ...
Ortiz, Ángel L. +3 more
core +1 more source
Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy
Advanced Engineering Materials, EarlyView.This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb +6 more
wiley +1 more source
Записки Горного института, 2017 The paper presents the results of a study (LA-ICP-MS method) of spinel from the collection of mantle xenoliths of lherzolites (seven xenoliths) selected in quaternary alkaline basalts of the Sverre volcano, the Spitsbergen archipelago.
D. S. Ashikhmin +3 more
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Multimodal Data‐Driven Microstructure Characterization
Advanced Engineering Materials, EarlyView.A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang +4 more
wiley +1 more source
International Journal of Electrochemical Science, 2014 V5+ and Cr6+ double doped nano lithium manganese oxide spinels Li[VxCrxMn2-2X]O4, (x=0.00, 0.02, 0.05 %)] were synthesized by doping the pure spinel LiMn2O4 with vanadium and chromium ions as cathode materials for rechargeable batteries applications ...
Fawaz A. Saad +3 more
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Advanced 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
NanomaterialsA new series of [Fe3−xLnx]O4 nanoparticles, with Ln = Gd; Dy; Lu and x = 0.05; 0.1; 0.15, was synthesized using the coprecipitation method. Analyses by X-ray diffraction (XRD), Rietveld refinement, and high-resolution transmission electron microscopy ...
Cristóbal Pinto García +9 more
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