نتایج جستجو برای: hybrid composites

تعداد نتایج: 234064  

2015
José A.F. Gamelas Eduardo Ferraz

Composites of nanocellulose with layered silicates have recently emerged as a new type of composite materials offering superior strength, as well as thermal and gas barrier properties. These organic-inorganic hybrid composites with a nacre-like structure can be obtained from renewable resources and are environmentally friendly. They can potentially be presented as a serious alternative in the n...

ژورنال: مجله دندانپزشکی 2007
حسنی ‌طباطبائی, معصومه, عطایی, محمد, متوسلیان, فریبا, میرزایی, منصوره,

Background and Aim: Halogen lamp is the commonly used light source for composite photo polymerization. Recently, high power halogen lamps, LED and plasma arc are introduced for improving the polymerization. The aim of this study was to investigate the effect of conventional and high power halogen lamps and LED light curing unit on degree of conversion of two different composite resins.Materials...

2015
Christopher M Pastore

Lightweighting is essential for the reduction of energy consumption in transportation. The most common approach is through the application of high specific strength and stiffness materials, such as composites and high performance aluminum alloys. One of the challenges associated with the use of advanced materials is the high cost. This paper explores the opportunities of using hybrid composites...

Journal: :Advanced materials 2015
Eun Seon Cho Nelson E Coates Jason D Forster Anne M Ruminski Boris Russ Ayaskanta Sahu Norman C Su Fan Yang Jeffrey J Urban

An emerging class of materials that are hybrid in nature is propelling a technological revolution in energy, touching many fundamental aspects of energy-generation, storage, and conservation. Hybrid materials combine classical inorganic and organic components to yield materials that manifest new functionalities unattainable in traditional composites or other related multicomponent materials, wh...

Arjomand1, Mansouri, hourizad, maryam, kharazi fard, mohammad javad, Shabani, Mohaddesh , yeganefar, maryam,

Abstract Background & Aim: Considering the widespread use of composite restorations and the provision of nanocomposites on one side and the common use of mouthwashes, there are concerns about the microhardness of composites and their known complications following mouthwashes. So, the present study was aimed to compare the effect of two mouthwash with alcohol and without alcohol on microhardness...

2015
Bahareh Yazdani Fang Xu Iftikhar Ahmad Xianghui Hou Yongde Xia Yanqiu Zhu

Tribological performance of the hot-pressed pure Al2O3 and its composites containing various hybrid contents of graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) were investigated under different loading conditions using the ball-on-disc method. Benchmarked against the pure Al2O3, the composite reinforced with a 0.5 wt% GNP exhibited a 23% reduction in the friction coefficient along wit...

2008
Chenli Gan Yanpeng Zhang S. W. Liu Yunjun Wang Min Xiao

Hybrid composites of CdSe nanocrystals embedded in allyl diglycol carbonate (CR39) matrices have been prepared and characterized. The measurements show that the linear refractive index of the composite decreases as the CdSe nanocrystal’s weight-percentage concentration increases at the laser wavelengths of 632.8 nm and 532 nm. The room temperature nonlinear optical properties of the hybrid comp...

2016
Eun Jin Bae Young Hun Kang Kwang-Suk Jang Song Yun Cho

UNLABELLED The thermoelectric properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) ( PEDOT PSS) and tellurium- PEDOT PSS (Te- PEDOT PSS) hybrid composites were enhanced via simple chemical treatment. The performance of thermoelectric materials is determined by their electrical conductivity, thermal conductivity, and Seebeck coefficient. Significant enhancement of the elec...

2012
Abhishek Dutta Srinivasan Arjun Tekalur Milan Miklavcic

Hybrid staggered architecture composites, like nacre and bone, are known for two discernible aspects: superior strength and synergistic toughness. What is lacking is the scientific rationale proving suitability of these materials under impact/time dependent loading. The current investigation aims to address the structure-property correlationship of these materials by development of an analytica...

2015
Naveen .J

Natural fibers are receiving considerable attention as substitutes for synthetic fiber reinforcements such as glass in polymer due to their low density, low cost, acceptable specific strength, reduced tool wear and respiratory irritation and renewable resources. The fibers are not uniformly distributed in the randomly oriented fiber reinforced hybrid composites due to manual lay-up and fibers a...

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