Results 21 to 30 of about 36,759 (293)

Kinetics of vanadium carbonitride precipitation in steel: A computer model [PDF]

open access: yes, 2005
We have constructed a computer model of the precipitation kinetics of vanadium carbonitride in steel that takes into account the composition evolution of the precipitates with time.
Gouné, Mohamed, Maugis, Philippe
core   +1 more source

RF and Surface Properties of Superconducting Samples [PDF]

open access: yes, 2011
The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since Rs varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface.
Weingarten, W.   +3 more
core   +3 more sources

Nanostructured Anodic Oxide Films of Niobium: Features of Electrochemical Formation, Functional Properties and Applications (Review)

open access: yesФізика і хімія твердого тіла, 2017
The review summarizes data on the anodic behavior of niobium in aqueous solutions. Features of electrochemical formation nanostructured oxide coatings on niobium by anodic oxidation are systematized.
B. I. Вayrachniy, I. A. Tokareva
doaj   +1 more source

Quantitative analysis of microstructure and mechanical properties of Nb–V microalloyed high-strength seismic reinforcement with different Nb additions

open access: yesHigh Temperature Materials and Processes, 2021
HRB500E seismic steel bars are mainly used in high-rise buildings near the seismic zone. The influence of different niobium contents (0–0.023%) on the microstructure and mechanical properties of HRB500E seismic reinforcement was studied.
Huang Sheng   +7 more
doaj   +1 more source

Niobium uptake and release by bacterial ferric ion binding protein [PDF]

open access: yes, 2010
Ferric ion binding proteins (Fbps) transport FeIII across the periplasm and are vital for the virulence of many Gram negative bacteria. Iron(III) is tightly bound in a hinged binding cleft with octahedral coordination geometry involving binding to ...
Dominic Campopiano   +12 more
core   +1 more source

Progress of Niobium and Tantalum Analytical Technology

open access: yesYankuang ceshi, 2018
As strategic emerging mineral resources supported by the state, niobium and tantalum are the functional and structural materials needed for the development of emerging industries.
LI Gang   +5 more
doaj   +1 more source

Preparation of Ni–MgO core-shell nano powders

open access: yesFenmo yejin jishu
Nickel nanopowders coated by magnesium oxide used for inner electrode of multilayer ceramic capacitor (MLCC) were prepared by coating thermal decomposition sintering method.
GUO Shun   +4 more
doaj   +1 more source

Separation and Selective Transport of Zirconium (IV) and Niobium (V) from Hydrochloric Media Through a Bulk Liquid Membrane [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2018
The separation of zirconium and niobium from lanthanides in hydrochloric medium and the selective transport of them via bulk liquid membrane (BLM) was examined.
S A. Milani, A Charkhi, S Eshghi
doaj   +1 more source

Removal of mechanical additives from the surface of cast niobium; pp. 241–246 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2008
A combined method of the utilization of deposits from the shaft furnace of niobium production consisting of the stages of thermomechanical treatment, hydrogenation, grinding, and separation was elaborated in industrial conditions.
Valeri Gorkunov   +2 more
doaj   +1 more source

Extraction of Niobium from ore deposits in KPK, Pakistan

open access: yesNUST Journal of Engineering Sciences, 2015
The extraction of Niobium through different extraction processes is reviewed in this paper. On the commercial scale the solvent extractants have been employed for the extraction of Niobium in the presence of hydrogen fluoride.
Muhammad Irfan   +2 more
doaj   +1 more source

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