نتایج جستجو برای: boron nitride nanotube reinforced composites

تعداد نتایج: 124027  

2014
M. Grujicic G. Cao W. N. Roy

Molecular-level simulations are used to examine the suitability of boron-nitride single-walled nanotubes (SWNTs) as fluidflow conduits in the nano-valve applications based on a molecular-mono-layer functionalized silicon cantilever. The interaction between the constituent atoms in the nanotubes is modeled using the Universal Force Field inter-atomic potential. Key functional requirements (a lar...

2005
Yang Liu Yi-Feng Wang Timofey G. Gerasimov Kenneth H. Heffner Julie P. Harmon

This work encompasses the development of low-viscosity cyclic oligomer underfill formulations that cure without heat evolution. Boron nitride, silica-coated aluminum nitride, and alumina ceramic powders were used as fillers in cyclic butylene terephthalate oligomer melts. The melts were heated with a suitable catalyst to induce polymerization. The effects of the filler type and composition on t...

Background & Aims: Drugs are highly active due to their many functional groups and can be easily destroyed by stomach acid and excreted before reaching target tissue. Thus, by encapsulating, a sheath is placed around drug to reduce reactivity of the drug due to stereo electronic resonance with nanotube and consequently drug stays longer in body. As a result, you can consume a smaller dose of dr...

Journal: :Journal of the mechanical behavior of biomedical materials 2011
Debrupa Lahiri Virendra Singh Ana Paula Benaduce Sudipta Seal Lidia Kos Arvind Agarwal

This study proposes boron nitride nanotube (BNNT) reinforced hydroxyapatite (HA) as a novel composite material for orthopedic implant applications. The spark plasma sintered (SPS) composite structure shows higher density compared to HA. Minimal lattice mismatch between HA and BNNT leads to coherent bonding and strong interface. HA-4 wt% BNNT composite offers excellent mechanical properties-120%...

2003
F. T. Fisher R. D. Bradshaw L. C. Brinson

Results in the literature demonstrate that substantial improvements in the mechanical behavior of polymers have been attained through the addition of small amounts of carbon nanotubes as a reinforcing phase. This suggests the possibility of new, extremely lightweight carbon nanotube-reinforced polymers with mechanical properties comparable to those of traditional carbon-fiber composites. Motiva...

Journal: :Journal of nanoscience and nanotechnology 2012
M G Mashapa N Chetty S Sinha Ray

Spin polarized density functional theory has been used to investigate the structural stability and electronic properties of extrinsic and intrinsic defects in boron nitride nanotubes. Carbon substitutional defects under nitrogen rich and boron-rich growth conditions have the lowest heats of formation compared to boron and nitrogen antisites. Creating a defect reduces the band gap of the nanotub...

Journal: :physical chemistry research 0
hossein roohi department of chemistry university of guilan mahjobeh jahantab university of guilan

the monitoring and controlling of environmental pollutions are very important in biological and industrial processes, and a great interest is growing with the development of suitable gas–sensitive materials and hazardous chemical removal devices. in this work, the highly parameterized, empirical exchange–correlation functional m06–2x were employed to investigate the electronic sensitivity of pe...

2002
Qing-Sheng Yang Qing-Hua Qin

The effect of fibre bundling on the effective transverse properties of unidirectional fibre composites has been investigated by way of finite element method and micromechanics models of fibre bundles. Based on the micromechanical model of single-fibre composites, plane strain models for composites reinforced by fibre bundles are presented. The effective elasto-plastic stress /strain behaviour w...

2004
N. Nishimura Y. J. Liu

The boundary integral equation (BIE) method is applied for the thermal analysis of fiber-reinforced composites, particularly the carbon-nanotube (CNT) composites, based on a rigid-line inclusion model. The steady state heat conduction equation is solved using the BIE in a two-dimensional infinite domain containing line inclusions which are assumed to have a much higher thermal conductivity (lik...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده مهندسی مکانیک 1392

در دو دهه اخیر پس از کشف نانولوله ها، تحقیقات گسترده ای بر روی آن ها صورت گرفته و این تحقیقات روز به روز در حال افزایش است. از لحاظ خواص فیزیکی نانولوله های برون- نیترید و نانولوله های کربنی، خواص فوق العاده ای دارند. به خاطر همین خواص وکاربردهای وسیع در وسایل نانومکانیکی، بررسی ارتعاشات نانولوله ها از اهمیت قابل ملاحظه ای برخوردار است. علاوه بر این کاربردها، در فرایند های تولیدی مانند تولید نا...

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