Origin of peraluminous minerals (corundum, spinel, and sapphirine) in a highly calcic anorthosite from the Sittampundi Layered Complex, Tamil Nadu, India
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DOI: 10.1007/s00410-017-1383-8
Abstract: The highly calcic anorthosite (An>95) from the Sittampundi Layered Complex (SLC) develops corundum, spinel and sapphirine that are hitherto not reported from any anorthositic rocks in the world. Petrological observations indicate the following sequence of… read more here.
Keywords: anorthosite sittampundi; corundum; highly calcic; calcic anorthosite ... See more keywords
Competition between thermodynamics, kinetics and growth mode in the early-stage oxidation of an equimolar CoCrFeNi alloy
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DOI: 10.1016/j.actamat.2020.06.056
Abstract: Abstract We demonstrate that the early-stage oxidation of a CoCrFeNi multi-principal element alloy depends upon competition between kinetic and thermodynamic factors involving the relative diffusion rate of cations and oxygen, and how this couples to… read more here.
Keywords: thermodynamics; corundum; stage oxidation; early stage ... See more keywords
Advances in fabrication of ceramic corundum abrasives based on sol–gel process
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Journal of Aeronautics"
DOI: 10.1016/j.cja.2020.07.004
Abstract: Abstract Corundum abrasives with good chemical stability can be fabricated into various free abrasives and bonded abrasive tools that are widely used in the precision machining of various parts. However, these abrasives cannot satisfy the… read more here.
Keywords: corundum abrasives; advances fabrication; corundum; ceramic corundum ... See more keywords
Aluminum solubility in bridgmanite up to 3000 K at the top lower mantle
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DOI: 10.1016/j.gsf.2020.04.009
Abstract: Abstract The temperature dependence of the Al2O3 solubility in bridgmanite has been determined in the system MgSiO3–Al2O3 at temperatures of 2750–3000 K under a constant pressure of 27 GPa using a multi-anvil apparatus. Bridgmanite becomes… read more here.
Keywords: corundum; bridgmanite; solubility; solubility bridgmanite ... See more keywords
The Influence of Corundum Content and Sintering Temperature on the Mechanical Properties of CaO–ZrO2–Al2O3 Ceramic Composites
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DOI: 10.1134/s1063785018020219
Abstract: We have studied the mechanical properties (Vickers microhardness HV and fracture toughness KC) of nanostructured CaO–ZrO2–Al2O3 ceramic composites as dependent on the content of corundum (0 ≤ $$C_{Al_{2}O_{3}}$$CAl2O3 ≤ 25%) and the temperature of sintering… read more here.
Keywords: ceramic composites; zro2 al2o3; corundum; al2o3 ceramic ... See more keywords
Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis
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DOI: 10.3390/min9010049
Abstract: Greece contains several gem corundum deposits set within diverse geological settings, mostly within the Rhodope (Xanthi and Drama areas) and Attico-Cycladic (Naxos and Ikaria islands) tectono-metamorphic units. In the Xanthi area, the sapphire (pink, blue… read more here.
Keywords: ppm; corundum; pink; geology ... See more keywords
Recycling of Waste Corundum Abrasive Powder in MK-Based Geopolymers
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DOI: 10.3390/polym14112173
Abstract: Recycling corundum abrasive powder in metakaolin-based geopolymer formulations is proposed to reduce the amount of waste to be treated or disposed of in landfills, allowing to decrease ecological damage as well as to reduce transport… read more here.
Keywords: waste; corundum; corundum abrasive; abrasive powder ... See more keywords
The Origin of a New Pargasite-schist Hosted Ruby Deposit from Paranesti, Northern Greece
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DOI: 10.3749/canmin.1700014
Abstract: Gem-quality (cabochon) ruby-bearing occurrences (here termed PAR-1 and PAR-5) located near Paranesti, north eastern Greece have been systematically studied for the first time in this paper. Tectonically, the occurrences are located within the Nestos Shear… read more here.
Keywords: schist hosted; corundum; hosted ruby; ruby deposit ... See more keywords