Results 91 to 100 of about 179 (108)
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International Journal of Refractory Metals and Hard Materials, 2013
Abstract High-pressure strength and plastic properties of nanocrystalline tantalum carbide (nano-TaC) have been investigated by using synchrotron radiation up to 65.5 GPa. Nano-TaC shows a bulk modulus of K 0 = 433 ± 7 GPa with K ′ 0 fixed at 4.0. It is close to that of diamond and is higher than the results from micron-TaC.
Hai-hua Chen +8 more
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Abstract High-pressure strength and plastic properties of nanocrystalline tantalum carbide (nano-TaC) have been investigated by using synchrotron radiation up to 65.5 GPa. Nano-TaC shows a bulk modulus of K 0 = 433 ± 7 GPa with K ′ 0 fixed at 4.0. It is close to that of diamond and is higher than the results from micron-TaC.
Hai-hua Chen +8 more
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Physics of the Solid State, 2015
The effect of the milling energy and nonstoichiometry of cubic tantalum carbide TaC y (0.81 ≤ y ≤ 0.96) on the strain anisotropy of the crystal and the size of particles in nanocrystalline powders has been experimentally investigated using X-ray diffraction.
A. I. Gusev +3 more
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The effect of the milling energy and nonstoichiometry of cubic tantalum carbide TaC y (0.81 ≤ y ≤ 0.96) on the strain anisotropy of the crystal and the size of particles in nanocrystalline powders has been experimentally investigated using X-ray diffraction.
A. I. Gusev +3 more
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Physics of the Solid State, 2016
Nanocrystalline powders of the nonstoichiometric tantalum carbide TaC y (0.81 ≤ y ≤ 0.96) with an average particle size in the range from 45 to 20 nm have been prepared using high-energy ball milling of coarse-grained powders. The density of the initial coarse-grained and prepared nanocrystalline powders of TaC
A. S. Kurlov, A. I. Gusev
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Nanocrystalline powders of the nonstoichiometric tantalum carbide TaC y (0.81 ≤ y ≤ 0.96) with an average particle size in the range from 45 to 20 nm have been prepared using high-energy ball milling of coarse-grained powders. The density of the initial coarse-grained and prepared nanocrystalline powders of TaC
A. S. Kurlov, A. I. Gusev
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Reactivity of Tantalum Carbide Cluster Anions TaCn– (n = 1–4) with Dinitrogen
The Journal of Physical Chemistry A, 2018Dinitrogen activation/fixation is one of the most important and challenging subjects in synthetic as well as theoretical chemistry. In this study, the adsorption reactions of N2 onto TaC n- ( n = 1-4) cluster anions have been investigated by means of mass spectrometry in conjunction with density functional theory calculations.
Li-Hui Mou +4 more
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Structure Prediction and Mechanical Properties of Tantalum Carbide (TaC) on ab initio Level
Zeitschrift für anorganische und allgemeine ChemieAbstractTantalum carbide (TaC) is an extremely hard, brittle, refractory ceramic material with excellent physical properties, which makes it a desirable material in e. g. aerospace industries. In order to explore the range of feasible modifications of TaC, we have executed a crystal structure prediction study of the TaC chemical system using a multi ...
Zagorac, Dejan +5 more
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physica status solidi (b), 1996
AbstractThe low‐temperature heat capacity of nonstoichiometric niobium and tantalum carbides in disordered and ordered states is measured by an adiabatic calorimetry method. It is found that in the temperature interval from 4 to 300 K the investigated ordered carbides have a higher heat capacity than the disordered carbides of the same composition. The
A. I. Gusev +2 more
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AbstractThe low‐temperature heat capacity of nonstoichiometric niobium and tantalum carbides in disordered and ordered states is measured by an adiabatic calorimetry method. It is found that in the temperature interval from 4 to 300 K the investigated ordered carbides have a higher heat capacity than the disordered carbides of the same composition. The
A. I. Gusev +2 more
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Radiation Effects and Defects in Solids, 1991
Abstract The damage rate (electrical resistivity increase per fluence unit δρ/δΦ) has been measured in cubic tantalum carbides TaC0.99 and TaC0.80, during irradiation at 21 K by electrons of energies E ranging from 0.4 to 2.7 MeV. Both experimental δρ/δΦ versus E curves clearly display two thresholds at E < 0.35 MeV and E < 1.5 MeV.
D. Gosset +3 more
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Abstract The damage rate (electrical resistivity increase per fluence unit δρ/δΦ) has been measured in cubic tantalum carbides TaC0.99 and TaC0.80, during irradiation at 21 K by electrons of energies E ranging from 0.4 to 2.7 MeV. Both experimental δρ/δΦ versus E curves clearly display two thresholds at E < 0.35 MeV and E < 1.5 MeV.
D. Gosset +3 more
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Densification, microstructure and mechanical properties of hot pressed tantalum carbide
Ceramics International, 2017Mahdi Ghassemi Kakroudi +2 more
exaly