Results 51 to 60 of about 276 (148)

Investigation of the Effect of Supersonic Flow of Dissociated Nitrogen on ZrB₂-HfB₂-SiC Ceramics Doped with 10 vol.% Carbon Nanotubes. [PDF]

Materials (Basel), 2022
Simonenko EP, Simonenko NP, Kolesnikov AF, Chaplygin AV, Lysenkov AS, Nagornov IA, Mokrushin AS, Kuznetsov NT.   +7 more
europepmc   +1 more source

Processing and characterization of boron carbide-hafnium diboride ceramics

, 2011
Hafnium diboride based ceramics are promising candidate materials for advanced aerospace and nuclear reactor components. The effectiveness of boron carbide and carbon as HfB₂ sintering additives was systematically evaluated.
Brown-Shaklee, Harlan J.
core  

Chemically-modified hafnium diboride for hypersonic applications: synthesis and characterisation [PDF]

, 2016
Hypersonic flight at a speed greater than Mach 5 (1715 ms-1) requires materials that can withstand temperatures up to 3000°C, high heat flux, rapid heating and disassociated reactive oxygen in the extreme environment of space and during re-entry.
Pengxiang Zheng (7125176)
core   +1 more source

Research of Thermal Stability of Tapes of Diboride of Hafnium and Receipt of Optimization Model of Cutting Process

, 2014
The short analysis of thermal stability and features of structure and physical-mechanical descriptions of thin wearproof coverages is executed on the basis of diborides of transitional metals, under act of high temperatures.
Goncharov, A.A., Stupak, V.A., Petukhov, V.V., Agulov, A.V., Vasileva, L.V.   +4 more
core  

High temperature mechanical properties of polycrystalline hafnium carbide and hafnium carbide containing 13-volume-percent hafnium diboride

, 1969
High temperature mechanical properties of polycrystalline hafnium carbide containing 13- volume-percent hafnium ...
Probst, H. B., Sanders, W. A.
core  

Oxidation of Ceramic Materials Based on HfB₂-SiC under the Influence of Supersonic CO₂ Jets and Additional Laser Heating. [PDF]

Int J Mol Sci, 2023
Simonenko EP, Kolesnikov AF, Chaplygin AV, Kotov MA, Yakimov MY, Lukomskii IV, Galkin SS, Shemyakin AN, Solovyov NG, Lysenkov AS, Nagornov IA, Mokrushin AS, Simonenko NP, Kuznetsov NT.   +13 more
europepmc   +1 more source

Self-propagating mechanosynthesis of HfB2 nanoparticles by a magnesiothermic reaction

, 2019
A mechanically induced self-sustaining reaction (MSR) was used to synthesize hafnium diboride nanoparticles. Along this route, magnesium was selected as a robust reducing agent for co-reduction in boron and hafnium oxides in a combustive manner ...
Sayagués, María Jesús, Gotor, F.J., Jalaly, Maisam   +2 more
core   +1 more source

Stressed Oxidation of Hafnium Diboride in Air at 1500°C

, 2017
Hypersonic vehicles with narrow airfoils produce thin boundary layers and shock temperatures in excess of 2000°C, exceeding the operating limits of traditional aerospace materials.
Bowen, Thomas A.
core  

High Entropy Borides Synthesized by the Thermal Reduction of Metal Oxides in a Microwave Plasma. [PDF]

Materials (Basel), 2023
Storr B, Amezaga C, Moore L, Iwan S, Vohra YK, Chen CC, Catledge SA.   +6 more
europepmc   +1 more source

Mechanically-activated solid-state synthesis of nanoparticles of HfB2, HfC and HfN from partially hydrated hafnium tetrachloride

, 2008
International audienceNanocrystalline hafnium diboride, carbide and nitride are synthesised by a two-step process, namely a short mechanical activation step (∼1?2 h) of powder mixtures based on partially hydrated hafnium tetrachloride, ph-HfCl4, and on ...
Barres, Odile, Le Caër, Gérard, Bégin-Colin, Sylvie, Villiéras, Frédéric, Barraud, Elodie   +4 more
core   +1 more source