Results 41 to 50 of about 113 (106)

Melting point of group IV and V transition metal diborides

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
The environmental conical nozzle levitator system enables cooling trace experiments above 4000 K. These cooling trace experiments were used to determine the melting points through observation of thermal arrest of group IV and V transition metal diborides (TiB2, Tm = 3313 ± 33 K; ZrB2, Tm = 3404 ± 38 K; HfB2, Tm = 3529 ± 33 K; and TaB2, Tm = 3284 ± 10 K;
Fox Thorpe, Elizabeth Sobalvarro Converse, Jesus Rivera, William Rosenberg, Scott J. McCormack   +4 more
wiley   +1 more source

Ab initio study of the effect of substitutional impurities Mo and C on the physico mechanical properties of ZrB2-based solid solutions

Physics Open
A predictive computational approach has been developed and implemented to evaluate the bulk modulus (B) and single-crystal hardness (HV) of ZrB2-based solid solutions containing substitutional Mo and/or C impurities. By employing first-principles studies
Nataliia Rozhenko, Liubov Ovsiannikova, Valerii Kartuzov, Serhii Ivanov   +3 more
doaj   +1 more source

The beneficial effect of agglomerations of inclusions on the fracture toughness of ceramic nanocomposites

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Agglomerations of carbon‐based inclusions and the low adhesion of inclusion‐matrix interfaces are commonly viewed as detrimental to the strength and fracture toughness of ceramic composites. While large, high‐power agglomerations indeed promote microcracking, our computations show that moderate agglomeration levels can enhance energy ...
Elijah N. Borodin, Alexander G. Sheinerman, Mikhail Yu. Gutkin, Andrey P. Jivkov   +3 more
wiley   +1 more source

A unified thermo‐chemo‐mechanical model for passive, active, and interfacial oxidation of silicon carbide

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Silicon carbide (SiC) is a promising material for hypersonic thermal protection systems, but its complex oxidation behavior—marked by transitions between passive, active, and interfacial bubbling regimes—can lead to catastrophic failure. Existing SiC models typically focus exclusively on either passive or active oxidation.
Théo A. Rulko, Raúl A. Radovitzky
wiley   +1 more source

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

Thermodynamic modeling of the Hf-Ta-O system for the design of oxidation resistant HfC-TaC ceramics

Open Ceramics
An improved understanding of the oxidation resistance of HfC-TaC ultra-high temperature ceramics (UHTCs) is developed through modeling of the phase equilibria in the Hf-Ta-O system and HfO2-Ta2O5 isoplethal section. CALculation of PHAse Diagrams (CALPHAD)
Rahim Zaman, Elizabeth J. Opila, Bi-Cheng Zhou   +2 more
doaj   +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

Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving

Advanced Science
Multicomponent Ti‐containing ultra‐high temperature ceramics (UHTCs) have emerged as more promising ablation‐resistant materials than typical UHTCs for applications above 2000 °C. However, the underlying mechanism of Ti improving the ablation performance
Junshuai Lv, Wei Li, Yanqin Fu, Menglin Zhang, Lingxiang Guo, Fanyu Lu, Jiachen Li, Tao Li, Yulei Zhang, Hejun Li   +9 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

Advances in High-Performance Ceramic Materials for Aerospace and Defence Applications: A State-of-the-Art Review

Ceramics
Ceramic materials are indispensable to aerospace and defence technologies, where structural and functional components are required to withstand extreme thermal, mechanical, and chemically aggressive environments.
Alfredo Aguilar-Elguezabal, Armando Reyes-Rojas, Hilda Esperanza Esparza-Ponce, Daniel Lardizábal-Gutiérrez, Miguel Humberto Bocanegra-Bernal   +4 more
doaj   +1 more source