Results 71 to 80 of about 885 (219)

Multidisciplinary design of a micro-USV for re-entry operations

, 2010
Unmanned Space Vehicles (USV) are seen as a test-bed for enabling technologies and as a carrier to deliver and return experiments to and from low-Earth orbit.
Liqiang, Hou, Vasile, Massimiliano, Edmondo Minisci, Hou Liqiang, Minisci, Edmondo, Massimiliano Vasile   +5 more
core   +1 more source

Fracture strength of multi-component ultra-high temperature carbides

, 2022
Ultra-high temperature ceramics (UHTCs) have emerged as a promising material for next generation re-entry hypersonic vehicles due to high melting point (\u3e3000 °C), and high mechanical properties and oxidation resistance.
Garino, Gia
core   +1 more source

Oxidation of HfB₂-HfO₂-SiC Ceramics Modified with Ti₂AlC Under Subsonic Dissociated Airflow

Corrosion and Materials Degradation
Ultrahigh-temperature ceramic composites based on hafnium diboride have a wide range of applications, including as components for high-speed aircraft and energy generation and storage devices.
Elizaveta P. Simonenko, Aleksey V. Chaplygin, Nikolay P. Simonenko, Ilya V. Lukomskii, Semen S. Galkin, Anton S. Lysenkov, Ilya A. Nagornov, Artem S. Mokrushin, Tatiana L. Simonenko, Anatoly F. Kolesnikov, Nikolay T. Kuznetsov   +10 more
doaj   +1 more source

Plasma wind tunnel characterization of plasma-sprayed UHTC coatings

, 2017
Ceramic coatings are widely used as thermal barrier or as oxidation barrier, in many industrial applications. The use of UHTC is mandatory when dealing with hypersonic vehicles characterized by high thermal flux in oxidizing environment.
De Stefano Fumo, Mario, Belardo, Marika, Gardi, Roberto, Cantoni, Stefania, Marino, Giuliano   +4 more
core  

Socio-Demographic and Housing Condition Urban Slum and Rural Households, Gujarat, India

National Journal of Community Medicine, 2017
Background: By 2025-26 the number of middle class households in India is likely to more than double from the 2015-16 levels to 113.8 million households or 547 million individuals.
Bipin Prajapati, Kanita Banker, Jignesh Chauhan, Sunil Nayak   +3 more
doaj  

A Study on Health Status of Urban School Children (7-18 Years): A School Based Cross Sectional Study

National Journal of Community Medicine, 2017
Background: School age is considered as a dynamic period of growth and development because children undergo physical, mental, emotional and social changes.
Jai P Singh, Atul Kumar Singh
doaj  

Short-Term Oxidation of HfB₂-SiC Based UHTC in Supersonic Flow of Carbon Dioxide Plasma

Plasma
The short-term (5 min) exposure to the supersonic flow of carbon dioxide plasma on ultrahigh-temperature ceramics of HfB2-30vol.%SiC composition has been studied.
Aleksey V. Chaplygin, Elizaveta P. Simonenko, Mikhail A. Kotov, Vladimir I. Sakharov, Ilya V. Lukomskii, Semen S. Galkin, Anatoly F. Kolesnikov, Anton S. Lysenkov, Ilya A. Nagornov, Artem S. Mokrushin, Nikolay P. Simonenko, Nikolay T. Kuznetsov, Mikhail Y. Yakimov, Andrey N. Shemyakin, Nikolay G. Solovyov   +14 more
doaj   +1 more source

In situ study of the oxidation of UHTC materials

, 2019
International audienceThe Ultra-High Temperature Ceramics are a class of materials of growing interest. For applications like hypersonic flights, re-entry vehicles or propulsion, these materials are expected to sustain very high temperatures (>2000°C) in
Vilmart, Gautier, Justin, Jean-Francois, Julian-Jankowiak, Aurélie, Guérineau, V., Dorval, Nelly   +4 more
core   +1 more source

Clients Perceptions Regarding “Health Days Celebration Activities”: A Sense Making Study by Phenomenographic Analysis Approach

National Journal of Community Medicine, 2017
Background: Many factors operate in choosing health facility services such as health days celebrations activities and this aspect has not been explored in past.
Sanjeev Davey, Anuradha Davey, Santosh Kumar Raghav, Jay Vir Singh, Nirankar Singh, Dinesh Dimri   +5 more
doaj  

Near-net shape fabrication process of ZrB2-SiC ceramics using highly concentrated ZrB2 slurries and a precursor impregnation & pyrolysis process

Materials & Design
Near-net-shape fabrication of ZrB2–SiC ultra-high-temperature ceramics (UHTCs) remains challenging due to shrinkage and deformation during drying and densification, which compromise dimensional accuracy and densification reliability.
Hyun-Hee Choi, Yun Zou, Ji-Su Yoon, Sea-Hoon Lee   +3 more
doaj   +1 more source