نتایج جستجو برای: sic سینتر شده

تعداد نتایج: 480616  

2013
Wouter KG Leclercq Bram J Keulers Saskia Houterman Margot Veerman Johan Legemaate Marc R Scheltinga

UNLABELLED Additional non-English language abstract (in Dutch) BACKGROUND A properly conducted surgical informed consent process (SIC) allows patients to authorize an invasive procedure with full comprehension of relevant information including involved risks. Current practice of SIC may differ from the ideal situation. The aim of this study is to evaluate whether SIC practiced by Dutch genera...

2001
K G K WARRIER

Mullite–SiC nanocomposites are synthesized by introducing surface modified sol–gel mullite coated SiC particles in the matrix and densification and associated microstructural features of such precursor are reported. Nanosize SiC (average size 180 nm) surface was first provided with a mullite precursor coating which was characterized by the X-ray analysis and TEM. An average coating thickness of...

2014
Z. H. Xin C. Y. Zhang M. Yu C. S. Jayanthi S. Y. Wu

A comprehensive molecular dynamics study to shed light on the existence of SiC based cage nanostruc-tures Si m C n , together with their stability, structural and other properties, in the range of compositions with n/(n + m) from 0.4 to 0.6 has been carried out using an efficient semi-empirical Hamiltonian scheme. Through this study, a series of self-assembled stable (even up to 2000 K) SiC bas...

2010
Liudi Jiang Rebecca Cheung R. Cheung

Due to its desirable material properties, Silicon Carbide (SiC) has become an alternative material to replace Si for Microelectromechanical Systems (MEMS) applications in harsh environments. To promote SiC MEMS development towards future cost-effective products, main technology areas in material deposition and processes have attracted significant interest. The developments in these areas have c...

Journal: :Comput. Sci. Inf. Syst. 2013
Jyh-Horng Wen Yung-Cheng Yao Ying-Chih Kuo

The subcarriers of orthogonal frequency division multiplexing (OFDM) systems may fail to keep orthogonal to each other under timevarying channels. The loss of orthogonality among the subcarriers will degrade the system performace, and this effect is named intercarrier interference (ICI). In this paper, a Wiener-based successive interference cancellation (SIC) scheme is proposed to detect the OF...

ژورنال: :مواد پیشرفته در مهندسی (استقلال) 0
مسعود گلستانی پور m. golestanipour 1- materials research group and iranian academic center for education, culture and research (acecr), mashhad, iran1- گروه پژوهشی مواد و مؤسسه آموزش عالی علمی کاربردی جهاددانشگاهی خراسان رضوی، مشهد ابوالفضل باباخانی a. babakhani 2- department of metallurgical and materials engineering, faculty of engineering, ferdowsi university of mashhad, mashhad, iran2- گروه مهندسی متالورژی و مواد، دانشکده مهندسی، دانشگاه فردوسی مشهد سیدمجتبی زبرجد s.m. zebarjad 3- department of metallurgical engineering, faculty of engineering, university of shiraz, shiraz, iran3- گروه مهندسی متالورژی، دانشکده مهندسی، دانشگاه شیراز

در این پژوهش فوم­ های آلومینیومی aa356 با مقادیر مختلف از ذرات سیلیسیم کاربید (sic) به عنوان عامل تقویت­ کننده و پایدارساز و پودر کلسیم کربنات (caco3) به عنوان عامل فوم­ ساز با استفاده از روش فوم­ سازی مستقیم مذاب تولید شد. چگالی محصولات فومی بین 38/0 تا 68/0 گرم بر سانتی متر مکعب اندازه گیری شد. پس از آن ریزساختار و خواص فشاری فوم­ های کامپوزیتی aa356/sicp تولید شده بررسی شد. ارتباط بین تنش مس...

2013
Rositsa Yakimova Remigijus Vasiliauskas Jens Eriksson Mikael Syväjärvi

Recent research efforts in growth of 3C-SiC are reviewed. Sublimation growth is addressed with an emphasis on the enhanced understanding of polytype stability in relation to growth conditions, such as supersaturation and Si/C ratio. It is shown that at low temperature/supersaturation spiral 6H-SiC growth is favored, which prepares the surface for 3C-SiC nucleation. Provided the supersaturation ...

2008
Tomislav Matić Tomislav Švedek Marijan Herceg

The paper presents a model developed for numerical simulation of temperature dependence of a hypothetical Si and SiC diode and BJT current-voltage characteristics. A classical Si PN wide-base diode model and an E-M BJT model are used with SiC semiconductor-specific parameters. Intrinsic carrier concentrations, carrier mobility temperature and doping concentration dependence are calculated for b...

2003
N. Sieber R. C. G. Leckey

We report on highly resolved core-level and valence-band photoemission spectroscopies of hydrogenated, unreconstructed 6H-SiC(0001) and (0001̄) using synchrotron radiation. In the C 1s core level spectra of 6H-SiC(0001̄) a chemically shifted surface component due to C-H bonds is observed at a binding energy (0.4760.02) eV higher than that of the bulk line. The Si 2p core-level spectra of SiC(0001...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1392

نمونه های ybco خالص و آلائیده به نانو ذرات sic (سیلیکون کارباید) با درصدهای وزنی مختلف sic به روش سل-ژل با هدف بررسی تاثیر میزان آلایش بر پارامترهای ابررسانای دمای بالای ybco ساخته شدند. اندازه گیری های مقاومت ویژه به روش چهار-میله ای انجام شد. این اندازه گیری نشان می دهد که با افزایش آلایش، دمای گذار بحرانی در همه نمونه های آلائیده نسبت به نمونه خالص کاهش می یابد و نمونه ybco آلائیده 5wt%sic گ...

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