نتایج جستجو برای: b4c
تعداد نتایج: 739 فیلتر نتایج به سال:
In this study, 1 wt% boron carbide (B4C) reinforced PVA nanofibers were fabricated by the electrospinning technique as a new generation of ultra-thin, lightweight, and flexible neutron shielding nanocomposites. The influence B4C particles' size morphology on fiber formation radiation performance mats was investigated. results indicate that particle characteristics have dramatic properties thick...
Ultrashort period 1.0 nm W/Si multilayers have potential as dispersive Bragg reflectors in high-resolution x-ray fluorescence. However, formation of WSix leads to poor optical performance. To address this, we introduce ultrathin 0.1 B4C diffusion barriers sputter-deposited W/Si, inhibiting W–Si interaction. We demonstrate that the peak reflectance at a wavelength 0.834 increased with factor 3.4...
امروزه استفاده از مواد با شرایط کاربرد در دماهای بالا مورد توجه بسیاری از صنایع از جمله نیروگاه ها، صنایع فضایی، هوافضا و صنایع نظامی می باشد. کامپوزیت کربن – کربن به عنوان یک ماده مهندسی در درجه حرارت بالا، در صورتی کاربرد موفق دارد که از پوشش محافظ در برابر اکسیداسیون برخوردار باشد. از میان کلیه پوشش های تحقیق شده، نوع پوششی که حاوی zrb2 و sic باشد از همه موفق تر بوده و هنوز تحقیق در مورد بهب...
Boron carbide (B4C) is considered an ideal material for plasma-facing materials (PFMs) in nuclear fusion, due to a combination of excellent properties: high elastic modulus, chemical stability, low Z and melting point. In this paper, B4C coatings were fabricated onto tungsten (W) substrates using atmospheric plasma spraying (APS). The powder feed rate significantly affects the coating quality. ...
In this study, aluminium matrix boron carbide (B4C) and carbon nanofiber (CNF) reinforced hybrid composite was produced by powder metallurgy method their microstructure mechanical properties were investigated. The samples at 6 percentage volume ratios using hot pressing technique. Microstructure examination, hardness measurement, transverse rupture test, wear tests carried out in order to deter...
A project of an X-ray monochromator for the «SKIF» synchrotron based on two flat mirrors with multilayer reflective coatings is reported. The concept absence precision mechanical systems and feedthroughs in vacuum, which significantly reduces mirror surface contamination increases scanning accuracy. In addition, overall structure device greatly simplified this way, turn leads to a significant r...
Aluminum-based metal matrix composites with single or multiple ceramic reinforcements are finding application in the aerospace and automobile industries. In this research work, novel AA7150-B4C (aluminium7150 alloy–Boron carbide) nanocomposites were successfully fabricated, through liquid metallurgy route via stir casting method, incorporation of B4C nanoparticles different weight percentages u...
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