Results 31 to 40 of about 3,814,816 (395)

In situ high-pressure spectroscopic studies using moissanite (4H-SiC) anvils

open access: yesAIP Advances, 2018
We examined the Raman scattering and IR absorption spectroscopy of 4H-SiC and its performance as an anvil material for high-pressure UV-visible absorption spectroscopic measurements.
Jinbo Zhang   +7 more
doaj   +1 more source

Yolk–shell nanoarchitecture for stabilizing a Ce2S3 anode

open access: yesCarbon Energy, 2021
Rare‐earth sulfides are of research interest for lithium‐ion batteries (LIBs) due to their abundant lithium intercalation sites and low redox voltage.
Kanglong Hui   +9 more
doaj   +1 more source

Center of pressure based segment inertial parameters validation

open access: yesPLOS ONE, 2017
By proposing efficient methods for estimating Body Segment Inertial Parameters' (BSIP) estimation and validating them with a force plate, it is possible to improve the inverse dynamic computations that are necessary in multiple research areas. Until today a variety of studies have been conducted to improve BSIP estimation but to our knowledge a real ...
Clint Hansen   +4 more
openaire   +4 more sources

Stars creating a gravitational repulsion

open access: yes, 2018
In the framework of the Theory of General Relativity, models of stars with an unusual equation of state $\rho c^20$ where $\rho$ is the mass density and $P$ is the pressure, are constructed.
Bisnovatyi-Kogan, G. S.   +2 more
core   +1 more source

Toughening of silicon nitride ceramics through stress-induced phase transformation

open access: yesJournal of Advanced Ceramics
Ceramics, particularly covalently bonded ceramics, exhibit intrinsic brittleness resulting from the strong directional nature of their chemical bonds, significantly limiting their applications.
Shucheng Liu   +12 more
doaj   +1 more source

Synthesis of cBN-hBN-SiCw Nanocomposite with Superior Hardness, Strength, and Toughness

open access: yesNanomaterials, 2022
Nanocomposites with one-dimensional (1D) and two-dimensional (2D) phases can demonstrate superior hardness, fracture toughness, and flexural strength. Cubic boron nitride-hexagonal boron nitride-silicon carbide whiskers (cBN-hBN-SiCw) nanocomposites with
Lei Sun   +10 more
doaj   +1 more source

Ram pressure feeding super-massive black holes [PDF]

open access: yes, 2017
When supermassive black holes at the center of galaxies accrete matter (usually gas), they give rise to highly energetic phenomena named Active Galactic Nuclei (AGN).
A Boselli   +60 more
core   +2 more sources

Synthesis of quenchable amorphous diamond

open access: yesNature Communications, 2017
Diamond’s properties are dictated by its crystalline, fully tetrahedrally bonded structure. Here authors synthesize a bulk sp 3-bonded amorphous form of carbon under high pressure and temperature, show that it has bulk modulus comparable to crystalline ...
Zhidan Zeng   +10 more
doaj   +1 more source

Pressure-Modulated Host–Guest Interactions Boost Effective Blue-Light Emission of MIL-140A Nanocrystals

open access: yesNano-Micro Letters
Highlights The luminescence performance of MIL-140A is successfully improved via pressure treatment strategy with a significant increase of photoluminescence quantum yield from the initial 6.8% to 69.2%.
Ting Zhang   +9 more
doaj   +1 more source

Effects of Diamond on Microstructure, Fracture Toughness, and Tribological Properties of TiO2-Diamond Composites

open access: yesNanomaterials, 2022
The reinforcements represented by graphene nanoplatelets, graphite, and carbon nanotubes have demonstrated the great potential of carbon materials as reinforcements to enhance the mechanical properties of TiO2.
Bing Liu   +11 more
doaj   +1 more source

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