• ZrB2–SiC–G Composite Prepared by Spark Plasma Sintering

     · To avoid introduction of milling media during ball-milling process and ensure uniform distribution of SiC and graphite in ZrB 2 matrix ultrafine ZrB 2 –SiC–C composite powders were in-situ synthesized using inorganic–organic hybrid precursors of Zr(OPr) 4 Si(OC 2 H 5) 4 H 3 BO 3 and excessive C 6 H 14 O 6 as source of zirconium silicon boron and carbon respectively.

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  • High-pressure high-temperature sintering of diamond

    simultaneous ball milling of diamond and silicon powder mixtures. Composites with fine-grain diamonds embedded in a diamond–SiC nanocrystalline matrix were sintered from these mixtures. Scanning electron microscopy x-ray diffraction and Raman scattering were used to characterize the ball-milled precursors and the sintered composites.

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  • Two-step ball-milling synthesis of a Si/SiOx/C composite

    The two-step ball-milling synthesis of the Si/SiO x /C composites can avoid the generation of an inert SiC phase and realize the uniform dispersion of Si/SiO x in graphite carbon which offers good electrical conductivity and relieves the volume expansion of the Si/SiO x phase.

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  • Study of Microstructure and Mechanical Properties of Ball

     · FESEM Analysis Ball Milled Powder. The morphology of SiC particles after 40-h of milling time as observed under FESEM is shown in Fig. 2.The particles are greatly fractured and larger fraction of nano size particles in 40-h milled samples are observed this could be due to excess work hardening and enhancement of brittleness of the particles by milling 21 22 .

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  • Spark Plasma Sintering of High-Energy Ball-Milled ZrB2 and

    ZrB2 and HfB2 with incorporation of SiC are being considered as structural materials for elevated temperature applications. We used high energy ball milling of micron-size powders to increase lattice distortion enhanced inter-diffusion to get uniform distribution of SiC and reduce grain growth during Spark Plasma Sintering (SPS). High-energy planetary ball milling was performed on ZrB2 or HfB2

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  • Effects of Ball-milling Process on the Quality of SiC and

    SiC and Al composite powder was fabricated by high energy ball-milling method and it was observed and studied by means of SEM.Meanwhile effect factors of composite powder size and uniformity and density were analyzed such as ball milling rotation and time as well as SiC size and the quality ratio of SiC to Al.The results showed that long ball-milling time or high rotation leaded to good

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  • Two-step ball-milling synthesis of a Si/SiO x /C composite

    In order to further clarify the presence of SiC phase the XRD patterns of pure SiC and Si/SiO x /C-3 composite fabricated by one-step ball milling were conducted as shown in Fig. S2. † We can observed the typical peak at 35.6° corresponding to the pure SiC that clearly show the presence of SiC.

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  • Two-step ball-milling synthesis of a Si/SiOx/C composite

    The two-step ball-milling synthesis of the Si/SiO x /C composites can avoid the generation of an inert SiC phase and realize the uniform dispersion of Si/SiO x in graphite carbon which offers good electrical conductivity and relieves the volume expansion of the Si/SiO x phase.

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  • The synthesis of beta-SiC nanoparticles by high-energy

    The agglomeration problem of the beta-SiC nanoparticles synthesized by ball milling was resolved to a great extent by the introduction of 2 wt NH4Cl to the initial Si-C mixture. Under 325 nm excitation a stable and intensive broad emission peak at 387 nm was observed in the photoluminescence (PL) spectrum of the synthetic nanoparticles and

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  • Microstructural characterization of ball-milled metal

     · and 25 wt. SiC powders were separately added to the metals and blended for the pre-determined set times. The milling process for all the prepared powders was performed at a constant milling speed of 250 rpm under argon atmosphere (with purity of 99.99 ) with a Sepahan 84D planetary ball

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  • Parametric evaluation of ball milling of SiC in water

    A statistically designed experiment was conducted to determine optimum conditions for ball milling alpha-SiC in water. The influence of pH adjustment volume percent solids loading and mill rotational speed on grinding effectiveness was examined. An equation defining the effect of those milling variables on specific surface area was obtained.

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  • Recovery of SiC powder from sintered DPF using

    of milling-ball rotation speed milling solvent medium and treatment time were investigated to optimize this process in order to achieve the desired SiC powder. 3.1. Effect of the milling-ball on pulverization of the sintered DPF The decomposition of the milling-ball was a

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  • Recovery of SiC powder from sintered DPF using

    of milling-ball rotation speed milling solvent medium and treatment time were investigated to optimize this process in order to achieve the desired SiC powder. 3.1. Effect of the milling-ball on pulverization of the sintered DPF The decomposition of the milling-ball was a

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  • Structure and Deformation Behavior of Ti-SiC Composites

    Combining high energy ball milling and spark plasma sintering is one of the most promising technologies in materials science. The mechanical alloying process enables the production of nanostructured composite powders that can be successfully spark plasma sintered in a very short time while preserving the nanostructure and enhancing the mechanical properties of the composite.

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  • Recovery of SiC powder from sintered DPF using

    of milling-ball rotation speed milling solvent medium and treatment time were investigated to optimize this process in order to achieve the desired SiC powder. 3.1. Effect of the milling-ball on pulverization of the sintered DPF The decomposition of the milling-ball was a

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  • Microstructures and mechanical properties of B4C-TiB2-SiC

     · As shown in Fig. 3 (b) the amount of oxygen content and wastage of SiC balls increased linearly as the ball milling time increased. The oxygen content increased from 1.08 wt (BTS0h) to 2.67 wt (BTS24h) and the wastage of SiC balls increased from 0.2 wt (BTS0h) to 1.75 wt (BTS24h). Download Download high-res image (234KB)

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  • Effect of SiC nanoparticles on the precipitation behavior

     · The SiC np and 7075Al powders were first ball-milled together with a low-speed ball milling of 250 rpm/min for 4 h under the protection of Ar atmosphere and then the mixing process was performed with a high-speed ball milling of 500 rpm/min for 0.5 h to make the spherical matrix powders slightly cold-welded and deformed. The ball-to-powder

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  • The synthesis of beta-SiC nanoparticles by high-energy

    The agglomeration problem of the beta-SiC nanoparticles synthesized by ball milling was resolved to a great extent by the introduction of 2 wt NH4Cl to the initial Si-C mixture. Under 325 nm excitation a stable and intensive broad emission peak at 387 nm was observed in the photoluminescence (PL) spectrum of the synthetic nanoparticles and

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  • 100 grams Polished Silicon Carbide (SiC) Grinding Media

    Silicon Carbide Grinding Media Balls Silicon carbide grinding media ball has unique features such as high strength good wear/corrosion/chemical resistance light weight low thermal expansion high temperature resistance electrical insulation and non-magnetic. It is perfect for grinding application which requires hig

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  • International Journal for Research in Engineering

     · Ball milling of SiC particles carried out in wet milling arrangement by using toluene as a process control agent milled samples for FESEM analysis has been conducted in regular interval of time. During First 10 hours of milling SiC particles are fragmented into smaller size and irregular shape particles are observed as shown in Fig.3 (b).

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  • Reaction-Ball-Milling-Driven Surface Coating Strategy to

     · In this work we report a novel reaction-ball-milling surface coating strategy to suppress the pulverization of microparticle Si anodes upon lithiation/delithiation. By energetically milling the partially prelithiated microparticle Si in a CO2 atmosphere a multicomponent amorphous layer composed of SiOx C SiC and Li2SiO3 is successfully coated on the surface of Si microparticles. The

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  • Microstructural characterization of ball-milled metal

     · and 25 wt. SiC powders were separately added to the metals and blended for the pre-determined set times. The milling process for all the prepared powders was performed at a constant milling speed of 250 rpm under argon atmosphere (with purity of 99.99 ) with a Sepahan 84D planetary ball

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  • High Energy Planetary Ball Milling of SiC Powders

    The effects of high-energy ball milling on SiC powders were studied using a planetary apparatus. Conditions to obtain nanostructured SiC powders with an average crystallite size of 4 nm were determined and powders were characterized by XRD SEM and TEM analyses.

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  • Two-step ball-milling synthesis of a Si/SiOx/C composite

    The two-step ball-milling synthesis of the Si/SiO x /C composites can avoid the generation of an inert SiC phase and realize the uniform dispersion of Si/SiO x in graphite carbon which offers good electrical conductivity and relieves the volume expansion of the Si/SiO x phase.

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  • High-resolution electron microscopy observations of

     · Nanometre-sized kinks and cracks formed in 6H SiC under ball milling (BM) at room temperature have been observed and characterized on the atomic scale using high-resolution electron microscopy (HREM). Observations of the kinks show that numerous positive and negative partials are aligned at either of the kink boundaries and the stacking

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  • A Study of Preparation and Characterization of Nano-Sized

    This study investigated the preparation of nanosized crystalline SiC powders from micro sized Silicon Carbide powder at room temperature through high energy ball milling. Silicon carbide was milled with hardened steel balls and ball milling media under identical conditions of ball mass to powder mass ratio 10 1 and target milling times of 60 h.

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  • Rapid refinement of SiC particles by a novel milling

     · Silicon carbide (SiC) has been widely used in industries due to its advantages of wide bandgap high mechanical and thermal properties attractive thermal shock resistance and conductivity. To enhance the propertis of the components made of SiC ball-milling is usually adopted to refine SiC particles before fabrication.

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  • Synthesis of SiC nanoparticles by central composite design

     · In this work synthesising of SiC nanoparticles by mechanical milling was studied. The influence of ball to powder ratios milling speeds and milling times in

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  • Microstructural characterization of ball-milled metal

     · and 25 wt. SiC powders were separately added to the metals and blended for the pre-determined set times. The milling process for all the prepared powders was performed at a constant milling speed of 250 rpm under argon atmosphere (with purity of 99.99 ) with a Sepahan 84D planetary ball

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  • SILICON CARBIDE (SiC) CERAMIC BALLS

    9 rows · SILICON CARBIDE (SiC) BALLS Ceramic balls with good mechanical and stiffness

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  • Parametric evaluation of ball milling of SiC in water

    A statistically designed experiment was conducted to determine optimum conditions for ball milling alpha-SiC in water. The influence of pH adjustment volume percent solids loading and mill rotational speed on grinding effectiveness was examined. An equation defining the effect of those milling variables on specific surface area was obtained.

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