Results 231 to 240 of about 245,180 (301)
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Fabrication of niobium carbide coating on niobium by interstitial carburization
International Journal of Refractory Metals and Hard Materials, 2020Abstract Ceramic coatings on niobium substrates are fabricated by hot-pressing the niobium with cast iron at 1100 °C. The interstitial carbon atoms diffuse into the niobium, and NbC and Nb2C precipitate in the surface, forming a ceramic coating. The total volume fraction of the ceramic phases in the coating reaches 92%, and the grain size is in the ...
Ziyuan Zhao +5 more
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Sintering behavior of niobium carbide
Soviet Powder Metallurgy and Metal Ceramics, 19741. The kinetics of the sintering of niobium carbide is largely determined by the presence in the latter of iron, which is picked up during milling in units with steel balls. Activated sintering was found to be exhibited by powder containing, in the starting condition, as little as 0.3 wt.% of iron. No upper limit of the activating action of iron has
V. S. Kindysheva, P. S. Kislyi
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Materialwissenschaft und Werkstofftechnik
The cladding process offers advantages such as low porosity, minimal dilution, low distortion of substrate, small heat‐affected zone, contributing to improving the chemical, physical, and mechanical characteristics of the coatings.
L. H. R. Apolinário +4 more
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The cladding process offers advantages such as low porosity, minimal dilution, low distortion of substrate, small heat‐affected zone, contributing to improving the chemical, physical, and mechanical characteristics of the coatings.
L. H. R. Apolinário +4 more
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Optical and electrical properties of niobium carbide
Physical Review B, 1987The optical and electrical properties were measured for single crystals of ${\mathrm{NbC}}_{\mathrm{x}}$ for x=0.98, 0.87, and 0.76, and for one hot-isostatically-pressed sample of ${\mathrm{NbC}}_{0.88}$. Specular reflectance was measured between 0.025 and 11 eV, and ellipsometry measurements were made at 1.96 eV.
, Allison, , Modine, , French
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ACS Applied Materials and Interfaces
Periprosthetic osteolysis induced by the ultrahigh-molecular-weight polyethylene (UHMWPE) wear particles is a major complication associated with the sustained service of artificial joint prostheses and often necessitates revision surgery.
Shishuo Li +13 more
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Periprosthetic osteolysis induced by the ultrahigh-molecular-weight polyethylene (UHMWPE) wear particles is a major complication associated with the sustained service of artificial joint prostheses and often necessitates revision surgery.
Shishuo Li +13 more
semanticscholar +1 more source
Vaporization behavior of niobium carbide
Vacuum, 1962The vaporization behavior of niobium carbide was studied over the temperature range from 2260° to 2940°K utilizing the Langmuir method. NbC was observed to lose carbon preferentially down to a composition of NbC0.75, at which composition the vaporization proceeds congruently at a temperature of 2940°K.
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Crystal growth of niobium nitride and niobium carbide nitride
Journal of Crystal Growth, 1978Abstract Single crystals of niobium carbide nitride were obtained by zone melting growth in ambient nitrogen gas pressures of up to 9.0 MPa. Single crystals of δ-NbN or γ-NbN could not be obtained by this method, but single crystals of γ-NbN were obtained by annealing of NbN in nitrogen gas pressures of up to 2.0 MPa.
A.Nørlund Christensen, C. Rusche
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Activated sintering of niobium carbide
Soviet Powder Metallurgy and Metal Ceramics, 19631. A process has been proposed for the activated sintering of niobium carbide with additions of Fe and CoCl2; other conditions being equal, this process permits a three-fold increase in the packing of sintered components. 2. We have discussed processes occurring during activated sintering, on the basis of Dawihl's ideas [4] on packing ...
P. S. Kislyi +2 more
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Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, 2021
In this study, aluminium-silicon alloy AlSi10Mg powder of spherical morphology was mixed with niobium carbide powder had irregular morphology in weight percentages of 2, 4, 6 and 8 and processed in a planetary ball mill apparatus.
R. Radhakrishnan +2 more
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In this study, aluminium-silicon alloy AlSi10Mg powder of spherical morphology was mixed with niobium carbide powder had irregular morphology in weight percentages of 2, 4, 6 and 8 and processed in a planetary ball mill apparatus.
R. Radhakrishnan +2 more
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Gas evolution from zirconium carbide, niobium carbide, and tantalum carbide powders
Soviet Powder Metallurgy and Metal Ceramics, 1986This work was undertaken with the aim of determining the gas contents of zirconium carbide, niobium carbide, and tantalum carbide powders as functions of their processing history. A high-vacuum, high-temperature apparatus was used, connected to an oilless evacuation system and instruments for the mass-spectrometric measurement of amounts and ...
A. V. Makeev +3 more
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