Results 61 to 70 of about 885 (219)

Atomic‐scale structure elucidation of refractory metal carbides derived from metallocene‐based preceramics

Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.
Abstract Polymer‐derived ceramics (PDCs) are becoming an alluring class of materials that can incorporate the ceramic chemistries found in ultra‐high‐temperature ceramics, such as Ti, Zr, and Hf carbides. The use of polymeric materials intrinsically enables processing techniques with a higher degree of complexity in a more straightforward fashion, such
Stephanie L. Chua, Haira G. Hackbarth, James F. Ponder Jr., Nicholas D. Posey, Yuwei Yang, Pierre‐Olivier Autran, Matthew B. Dickerson, Timothy L. Pruyn, Nicholas M. Bedford   +8 more
wiley   +1 more source

Transition Metal Carbide‐Based Catalysis for Thermocatalytic Conversion Processes: Properties, Synthesis, Applications, and Future Outlook

ChemNanoMat, Volume 11, Issue 11, November 2025.
Transition metal carbides (TMCs) have electronic structure similar to that of platinum group metals, making them attractive for thermocatalysis applications. This review explores several essential aspects, discussing physical and chemical properties of TMCs, synthesis methods, and their utilization in thermocatalytic processes, including generation of ...
Edris Madadian, Yasaman Ghaffari, Yael Zilberman, David S. A. Simakov   +3 more
wiley   +1 more source

UHTC Composites for Leading Edges

, 2004
Ultrahigh temperature ceramics (UHTC) have performed unreliably due to material flaws and attachment design. These deficiencies are brought tot he fore by the low fracture tougness and thermal shock resistance of UHTC.
Opila, Elizabeth J., Levine, Stanley R.
core  

Surface Transformation of Ultrahigh-Temperature ZrB₂–HfB₂–SiC–C_CNT Ceramics Under Exposure to Subsonic N₂-CH₄ Plasma Flow

Ceramics
The chemical and microstructural transformation of the surface of a 31.5 vol.% ZrB2-31.5 vol.% HfB2-27 vol.% SiC-10 vol.% CCNT ultrahigh-temperature ceramic sample (where CCNT refers to carbon nanotubes) was studied under the influence of a subsonic N2 ...
Elizaveta P. Simonenko, Aleksey V. Chaplygin, Nikolay P. Simonenko, Ilya V. Lukomskii, Semen S. Galkin, Anton S. Lysenkov, Ilya A. Nagornov, Artem S. Mokrushin, Anatoly F. Kolesnikov, Nikolay T. Kuznetsov   +9 more
doaj   +1 more source

Advances in Transient-Liquid-Phase Bonding of Ultra-high Temperature ZrC Ceramics

High Temperature Materials and Processes, 2012
Full exploitation of the many attractive engineering properties of ultra-high temperature ceramics (UHTCs) requires that they can be joined. This paper explores progress in identifying joining strategies based on the use of transient liquid phases (TLPs).
Sciti Diletta, Silvestroni Laura, Esposito Laura, Nakashima Kunihiko, Saito Noritaka, Yamaoka Yoshinori, Glaeser Andreas M.   +6 more
doaj   +1 more source

Effect of WC addition on the mechanical properties and oxidation resistance of ZrB2/SiC‐based UHTCMCs

International Journal of Applied Ceramic Technology, Volume 22, Issue 6, November/December 2025.
Abstract The sintering behavior, mechanical properties, and oxidation resistance of carbon fiber reinforced ZrB2/SiC/WC composites were investigated. Sintering was carried out between 1800 and 2000°C via hot pressing at 40 MPa. WC was completely consumed in the process, and the resulting microstructure was characterized by the formation of Zr1−xWxC ...
Antonio Vinci, Matteo Mor, Luca Zoli, Diletta Sciti   +3 more
wiley   +1 more source

Medication Adherence among Adults with Type 2 Diabetes Mellitus: A Cross-Sectional Study at an Urban Health Training Centre in Mysuru, India [PDF]

Journal of Clinical and Diagnostic Research
Introduction: Diabetes is one of the four priority non-communicable diseases globally, due to its significant burden and associated complications.
Rachana K Nair, Mansoor Ahmed
doaj   +1 more source

Combustion synthesis of ultra‐high temperature ceramics: Review

International Journal of Applied Ceramic Technology, Volume 22, Issue 6, November/December 2025.
Abstract Novel and future‐oriented aerospace, energy, transportation, and other industrial technologies require materials capable of operating at temperatures above 2000°C. Ultra‐high temperature ceramic materials (UHTCs), based on carbides, borides, carbonitrides, and nitrides of transition metals—many with melting points exceeding 3000°C—possess the ...
Alexander S. Mukasyan, Alexander S. Rogachev   +1 more
wiley   +1 more source

Single-Source-Precursor Synthesis of Hafnium-Containing Ultrahigh-Temperature Ceramic Nanocomposites (UHTC-NCs)

, 2014
Amorphous SiHfBCN ceramics were prepared from a commercial polysilazane (HTT 1800, AZ-EM), which was modified upon reactions with Hf(NEt2)4 and BH3·SMe2, and subsequently cross-linked and pyrolyzed.
Ionescu, Emanuel, Ralf Riedel, Yuan, Jia, Riedel, Ralf, Stefania Hapis, Buntkowsky, Gerd, Xu, Yeping, Hapis, Stefania, Hans-Joachim Kleebe, Kleebe, Hans-Joachim, Emanuel Ionescu, Hergen Breitzke, Gerd Buntkowsky, Claudia Fasel, Breitzke, Hergen, Yeping Xu, Fasel, Claudia, Jia Yuan   +17 more
core   +1 more source

Contact Transfer Epitaxy of Halide Perovskites

Advanced Materials, Volume 37, Issue 39, October 2, 2025.
Bringing a halide perovskite thin film (donor) into contact with a self‐assembled monolayer of oriented perovskite nanocrystals (acceptor) at elevated temperature leads to epitaxial transfer of halide perovskite from the donor to the acceptor substrate.
Hongyu Sun, Linde M. van de Ven, Benjamin Duncan, Eva Stein, Daan Methorst, Maryam Mohammadi, Susan A. Rigter, Peter Schall, Erik C. Garnett   +8 more
wiley   +1 more source