نتایج جستجو برای: powder loading

تعداد نتایج: 122767  

2013
Sarah E. McCary Thomas R. Rybolt

Six carbon powders with varied surface areas and porosities were used to store and release acetaminophen (ACT). A 10 mg/mL solution of acetaminophen in phosphate buffer solution (pH = 7.0) at 25 ̊C with exposure to carbon powder for 72 hours was used to drive the maximum loading of acetaminophen into the powders. Carboxen 1012 (BET surface area of 1500 m/g) powder exhibited the greatest maximum ...

2012
Hanafi Ismail Komethi Muniandy Nadras Othman

Fatigue life, morphological studies, and thermal aging properties of rattan powder-filled natural rubber (NR) composites were investigated as a function of filler loading and a silane coupling agent. NR composites were prepared by the incorporation of rattan powder in the range of 0 to 30 phr into a NR matrix with a laboratory size two roll mill. Thermal aging was carried out for 7 and 14 days ...

2011
Mark A. Rodriguez Clark S. Snow Ryan R. Wixom Anna Llobet James F. Browning

In an effort to better understand the structural changes occurring during hydrogen loading of erbium target materials, we have performed in-situ D2 loading of erbium metal (powder) at temperature (450C) with simultaneous neutron diffraction analysis. This experiment tracked the conversion of Er metal to the  erbium deuteride (solid-solution) phase and then on to the  (fluorite) phase. Complet...

Journal: :Nanoscale 2015
Shaobo Xie Oana M Istrate Peter May Sebastian Barwich Alan P Bell Umar Khan Jonathan N Coleman

In this work we have used melt-processing to mix liquid-exfoliated boron-nitride nanosheets with PET to produce composites for gas barrier applications. Sonication of h-BN powder, followed by centrifugation-based size-selection, was used to prepare suspensions of nanosheets with aspect ratio >1000. The solvent was removed to give a weakly aggregated powder which could easily be mixed into PET, ...

1999
A. P. Mann D. I. Pullin M. N. Macrossan

Dynamic powder compaction is analyzed using the assumption that the powder behaves, while it is being compacted, like a hydrodynamic fluid in which deviatoric stress and heat conduction effects can be ignored throughout the process. This enables techniques of computational fluid dynamics such the equilibrium flux method to be used as a modeling tool. The equation of state of the powder under co...

2012
Berenika Hausnerova Tomas Sedlaček Petr Filip Petr Saha

Pressure effect on the rheological behaviour of powder-polymer compounds intended for powder injection moulding was determined. A single-piston capillary rheometer modified by addition of a second chamber with a restricting needle valve generating backpressure increasing the pressure in the melted material during the flow through the die was employed to determine pressure sensitivity coefficien...

Journal: :Journal of the American Chemical Society 2006
Vanessa K Peterson Yun Liu Craig M Brown Cameron J Kepert

Rietveld analyses of neutron powder diffraction data of D2 in Cu3(BTC)2, where BTC = 1,3,5-benzenetricarboxylate, reveals the location and progressive filling of six distinct D2 sites within the nanopore structure. Location of the primary site at the coordinatively unsaturated Cu atoms provides direct structural evidence of the potential importance of such metal sites to hydrogen storage. Compe...

2014
Hikmet Sezen Maria Buchholz Alexei Nefedov Carsten Natzeck Stefan Heissler Cristiana Di Valentin Christof Wöll

An important step in oxide photochemistry, the loading of electrons into shallow trap states, was studied using infrared (IR) spectroscopy on both, rutile TiO2 powders and single-crystal, r-TiO2(110) oriented samples. After UV-irradiation or n-doping by exposure to H-atoms broad IR absorption lines are observed for the powders at around 940 cm(-1). For the single crystal substrates, the IR abso...

Journal: :International Journal of Engineering & Technology 2018

2008
B. Ahn R. Mitra

Al 5083 alloy powder was mechanically milled in liquid nitrogen to achieve a nanocrystalline (NC) structure having an average grain size of 50 nm with high thermal stability, and then consolidated by quasi-isostatic (QI) forging. The consolidation resulted in ultrafine grains (UFG) of about 250 nm, and the bulk material exhibited enhanced strength compared to conventionally processed Al 5083. T...

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