Mechanical and structural characterizations of gamma- and alpha-alumina nanofibers

Vahtrus, Mikk; Umalas, Madis; Polyakov, Boris; Dorogin, Leonid; Saar, Rando; Tamme, Maret; Saal, Kristjan; Lõhmus, Rünno; Vlassov, Sergei

doi:10.1016/j.matchar.2015.07.004

Cited by 29 publications

(19 citation statements)

References 29 publications

(36 reference statements)

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“…It was suggested that such smooth nanobers were composed of elongated monocrystalline rutile segments. The ber morphology is very similar to that observed in monocrystalline Al 2 O 3 nanobers sintered at 1300 C. 54,55 The variations in SEM contrast (dark spots) on nanober surface (inset in Fig. 7f) appear, most probably, due to the presence of large voids formed during the grain coalescence.…”

Section: Resultssupporting

confidence: 72%

Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

et al. 2020

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Section: Resultssupporting

confidence: 72%

Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

et al. 2020

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“…Particles with sizes of about 350 lm were reported to be less radioactive after indirect labeling, as described in the experimental procedure. The particles were determined by XRD to be a-alumina (see Figure 3, [27] ). Table I shows significant differences in the surface area for different sizes of alumina, (reported previously [28] ), which agreed well with measurements reported here (0.4 m 2 /g for alpha-alumina, reported in reference, [28] when the powder was prepared by strong heating).…”

Section: Particle Labelingmentioning

confidence: 99%

Liquid Metal Flow Studied by Positron Emission Tracking

Dybalska

Caden

Parker

et al. 2020

Metall Mater Trans B

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To improve the properties of castings, a new technique to observe the fluid flow and study the motion of oxygen-bearing inclusions has been developed. This new technique, Positron Emission Particle Tracking (PEPT), enabled a single radioactive tracer particle, moving inside a liquid metal casting, to be tracked with an accuracy of some millimeters, depending on the properties of the liquid metal and the mold. These novel experiments give promising results to observe the liquid metal flow and locate the tracked particle in a casting. Experiments have shown that various particle sizes (200 to 600 μm presented here) can be used to observe the liquid metal flow, if the particle has sufficiently initial radioactivity. Different sizes of particles are considered and their radioactivity compared in terms of their usefulness for tracking in flowing liquid aluminum according to the specific surface area.

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“…Electrospinning (ES) is by far the most used top-down method for the production of ceramic nanofibers [6][7][8]. ES uses high electric fields (posing operational risks) to spin a precursor solution into hybrid fibers, followed by thermal treatments for removal of the organic component and ceramic formation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of alumina fibers using solution blow spinning

et al. 2019

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This work shows the successful production of alumina nanofibers after thermal treatment of solution blow spun hybrid fibers. These nanofibers were converted into γ-Al2O3 and α-Al2O3 after the thermal treatment in air between 500 to 1200 °C. The X-ray diffraction patterns presented all the characteristics of the γ and α phases of alumina. In addition, the scanning electron micrographs showed alumina nanofiber diameters varying between 200 and 270 nm for different temperatures. The results demonstrated that the solution blowing spinning method is efficient to produce alumina nanofibers.

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Mechanical and structural characterizations of gamma- and alpha-alumina nanofibers

Cited by 29 publications

References 29 publications

Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

Liquid Metal Flow Studied by Positron Emission Tracking

Synthesis and characterization of alumina fibers using solution blow spinning

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Mechanical and structural characterizations of gamma- and alpha-alumina nanofibers

Cited by 29 publications

References 29 publications

Nanofibrous TiO2produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

Nanofibrous TiO2produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

Liquid Metal Flow Studied by Positron Emission Tracking

Synthesis and characterization of alumina fibers using solution blow spinning

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Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

Nanofibrous TiO₂produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development