Results 181 to 190 of about 4,203 (225)

INDUCED NANOCRYSTALLIZATION OF DEXTROSE MONOHYDRATE

International Journal of Nanoscience, 2013
Modern ultrasound induction is very much useful in crystallization process. It uses piezoelectric transducers or quartz crystals to convert mechanical waves to electrical signals and vice versa. Growth of a crystal is environment dependent. The characteristics of grown crystals depend on impurities, temperature, preparation of the solution and ...
IRUDAYARAJ JOHNSON, B. KANICKAI RAJ, V. SIVAGAMI, NAGA PONDY SELVI   +3 more
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Nanocrystallization in Fe75Mo2.5Mn2.5Si6B14 amorphous alloy

Journal of Alloys and Compounds, 2014
Abstract Structure changes in Fe75Mo2.5Mn2.5Si6B14 amorphous alloy at heating within temperature range of 293–878 K have been studied by means of high-temperature X-ray diffraction method. Intensity curves and main structure parameters estimated from them are analyzed.
S. Mudry, Yu. Kulyk, S. Zhovneruk
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Nanocrystallization of amorphous CoSiBFeNb alloys

Nanostructured Materials, 1996
Abstract The effect of Fe and Nb contents on the crystallization behavior of CoSiBFeNb alloys was studied using Mossbauer spectroscopy, transmission electron microscopy and X-ray diffraction. It was found that the structure formed by primary crystallization in the (Co77Si13.5B9.5)88Fe7Nb5 alloy is similar to that of the famous Fe73.5Si1.35B9Cu1Nb3 ...
A. Serebryakov, V. Sedykh, V. Stelmukh, N. Novokhatskaya   +3 more
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Nanocrystallization in driven amorphous materials

Acta Materialia, 2013
The nanocrystallization of mechanically milled amorphous alloys was examined both experimentally and theoretically. Mechanical milling induces the precipitation of nanocrystals in an initially amorphous Nd–Fe–B magnetic alloy. The effects of milling speed and duration on precipitate growth/size were investigated.
S. Shukla, D.T. Wu, H. Ramanarayan, D. Srolovitz, R.V. Ramanujan   +4 more
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Surface nanocrystallization modification of anhydrite

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012
Abstract This paper reported a successful preparation of CaCO3/anhydrite composites of anhydrite coated with nanosized CaCO3 by chemical precipitation route using the Ca(OH)2–H2O–CO2 reaction system. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and BET ...
Wu Zhao, Huaming Yang, Chengli Huo
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Nanocrystallization mechanism of amorphous Fe78B13Si9

Applied Physics Letters, 2009
The nanocrystallization mechanism of an amorphous alloy is discussed based on the kinetics of open nanospaces in Fe78B13Si9. There already exists a high concentration of Fe-enriched fluctuated sites with open nanospaces in the amorphous matrix. The structural and compositional fluctuation helps transient short-range Fe diffusion in the metastable ...
K. Sato, H. Murakami, W. Sprengel, H.-E. Schaefer, Y. Kobayashi   +4 more
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Fabrication of TiO2 nanocrystallized glass

Applied Physics Letters, 2007
Nanocrystallization of rutile and anatase was observed in a CaO–B2O3–Bi2O3–Al2O3–TiO2 crystallized glass. The color of the present crystallized glass was changed by the heat-treatment temperature, and x-ray diffraction (XRD) patterns of the crystallized glass show that the apparent color change is correlated with the formation of titania ...
Hirokazu Masai, Takumi Fujiwara, Hiroshi Mori, Takayuki Komatsu   +3 more
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APFIM studies on nanocrystallization of amorphous alloys

Materials Science and Engineering: A, 1995
AbstractThis paper reports recent atom probe analysis results of Fe-Zr-B(-Cu) and Al-Ni-Ce(-Cu) amorphous alloys, in which nanocrystalline microstructures develop by primary crystallization. In these alloy systems, enrichment of slow diffusing solute was found at the interfaces between primary crystals and amorphous matrix during the nucleation and ...
K. Hono, Y. Zhang, A. Inoue, T. Sakurai
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Nanocrystallization of amorphous FeCuNbSiB based alloys

Nanostructured Materials, 1995
Abstract Nanocrystalline magnetic phases obtained by a suitable annealing of amorphous metallic ribbons are being extensively studied due to their attractive properties as soft magnetic materials. The influence of different heat treatments on the crystallization behaviour of particles with dimensions of the order of 10 nm in amorphous Fe73 ...
S. Suriñach, A. Otero, M.D. Baró, A.M. Tonejc, D. Bagovic   +4 more
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Nb-driven nanocrystallization of amorphous Fe75.5Cu1Nb3Si12.5B8

Journal of Non-Crystalline Solids, 1993
Abstract The process of crystallization of particles with dimensions of the order of 10 nm in amorphous Fe75.5Cu1Nb3Si12.5B8 (nanocrystallization) is investigated by three experimental techniques: isothermal resistance measurements, X-ray diffraction, and electron microscopy image analysis.
Frank van Bouwelen, Jilt Sietsma, A. van den Beukel   +2 more
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