Silicon carbide (SiC), a compound of silicon and carbon, with chemical formula SiC, the beta modification ( β-SiC), with a zinc blende crystal structure (similar to diamond), is formed at temperature below 1700°C. β-SiC will be the most suitable ceramic material for the future hard tissue replacement, such as bone and tooth. The in vitro cytotoxicity of β-SiC nanowires was investigated for the ...

OBJECTIVES To measure young people's perceptions of tobacco packaging according to two current pieces of legislation: The EU Tobacco Products Directive (TPD) and Ireland's Public Health (Standardisation of Tobacco Products) Act. DESIGN Within-subject experimental cross-sectional survey of a representative sample of secondary school students. School-based pen and paper survey. SETTING 27 sec...

abstract: in this study, al 2 o 3 –sic nanocomposites have been fabricated by mixing of alumina powder containing 0.05% weight magnesium oxide and silicon carbide nano powders, followed by hot pressing at 1650 0 c. the mechanical properties of al 2 o 3 -sic nanocomposites containing different volume fraction (2.5, 5, 7.5, 10 and 15%) of nano scale sic particles were investigated and compared wi...

The superior properties of silicon carbide (SiC) power electronic devices compared with silicon (Si) are expected to have a significant impact on next-generation vehicles, especially hybrid electric vehicles (HEVs). The system-level benefits of using SiC devices in HEVs include a large reduction in the size, weight, and cost of the power conditioning and/or thermal systems. However, the expecte...

Soft or weakly-consolidated sand refers to porous materials composed of particles (or grains) weakly held together form a solid but that can be easily broken when subjected stress. These do not behave as conventional brittle, linear elastic and the transition between these two regimes cannot usually described using poro-elastic models. Furthermore, geotechnical sampling techniques often result ...

The electrical compensation effect of the nitrogen incorporation at the SiO2/4H-SiC (p-type) interface after thermal treatments in ambient N2O is investigated employing both scanning spreading resistance microscopy (SSRM) and scanning capacitance microscopy (SCM). SSRM measurements on p-type 4H-SiC areas selectively exposed to N2O at 1150 °C showed an increased resistance compared to the unexpo...

This study investigated whether torso and thigh precooling during a warm-up effects neuromuscular function and 5 km time-trial performance in hot, humid conditions. Eight male, well-trained runners completed three randomized time-trials in 32.2 ± 0.8°C, 48.6 ± 6.7% relative humidity. A 30-min warm-up was completed with no cooling (Control), precooling via an ice vest (Vest), or ice packs coveri...

INTRODUCTION A number of recent studies document the proportion of all cigarette packs that are 'contraband' using discarded packs to measure tax avoidance and evasion, which we call tax non-compliance. To date, academic studies using discarded packs focused on relatively small geographical areas such as a city or a neighbourhood. METHODS We visited 160 communities across 38 US states in 2012...

In this research the influence of adding SiC on microstructure and electrical properties of ZnO-based Nanocomposite varistors were investigated. SiC was added with amounts of 10-0 mass% to ZnO-based varistor composition. It is found that SiC allows reaching to high threshold voltage with formation of fine-graine...

This paper describes the results of an exploratory study of blanket concepts based on SiC/SiC structure and LiPb breeder. An assessment of the performance of these concepts for advanced power plant application i s presented, key issues are identified, and constraints relating to the SiC/SiC properties are discussed.