Results 11 to 20 of about 113 (106)

A novel microstructural design to improve the oxidation resistance of ZrB2-SiC ultra-high temperature ceramics (UHTCs) [PDF]

Journal of Alloys and Compounds, 2019
Abstract Directionally Solidified 72.8 mol% ZrB2 - 27.2 mol% SiC (equivalent to 20 vol%) composite was fabricated using a crucibleless-melting technique. Microstructural and XRD analyses confirmed the texturing of grains and lamellar structure. The Lotgering (00l) orientation factor was as high as 0.97.
Haiwen Zhang, D.D. Jayaseelan, I. Bogomol, M.J. Reece, Chunfeng Hu, S. Grasso, W.E. Lee   +6 more
openaire   +1 more source

ZrB2–SiC spiral fibers prepared by combining liquid rope effect with non-solvent-induced phase separation method: A promising toughening material for ultra-high temperature ceramics

Journal of Advanced Ceramics, 2023
Spiral fibers were considered to be an ideal toughening phase of ultra-high torsional release effect. In this work, ZrB2 (Z)–20 vol% SiC (S) spiral fiber (ZSsf) with controllable structure was prepared by a combination approach of liquid rope effect and ...
Ruiji ZHANG, Fangwei GUO, Xing ZHANG, Wenchen ZHANG, Li HU, Desheng LIU, Xiaofeng ZHAO, Xin WANG   +7 more
doaj   +1 more source

UHTCs: Ultra-High Temperature Ceramic Materials for Extreme Environment Applications

The Electrochemical Society Interface, 2007
3000°C. That’s not just hot … it’s EXTREMELY hot. It is above the melting or decomposition temperatures for most of the materials known to man. But in the world of extreme environment engineering, it is just a baseline.
Eric Wuchina, Elizabeth Opila, Mark Opeka, Bill Fahrenholtz, Inna Talmy   +4 more
openaire   +1 more source

Oxidation behavior of boron-containing (Zr,Ti)CxBy solid solution ceramics at 1600 °C in air

Journal of Advanced Ceramics, 2023
Multicomponent boron-containing carbide coatings (i.e., (Zr,Ti)CxBy) on a C/C composite show good ablation resistance. However, the high-temperature oxidation behavior of this new type of boron-containing (Zr,Ti)CxBy solid solution ceramics has not been ...
Huilin Lun, Yi Zeng, Xiang Xiong, Houbu Li   +3 more
doaj   +1 more source

Numerical Simulation for Thermal Shock Resistance of Ultra-High Temperature Ceramics Considering the Effects of Initial Stress Field

Advances in Materials Science and Engineering, 2011
Taking the hafnium diboride ceramic as an example, the effects of heating rate, cooling rate, thermal shock initial temperature, and external constraint on the thermal shock resistance (TSR) of ultra-high temperature ceramics (UHTCs) were studied through
Weiguo Li, Tianbao Cheng, Dingyu Li, Daining Fang   +3 more
doaj   +1 more source

Propulsion tests on ultra-high-temperature ceramic matrix composites for reusable rocket nozzles

Journal of Advanced Ceramics, 2023
Ultra-high-temperature ceramic matrix composites (UHTCMCs) based on a ZrB2/SiC matrix have been investigated for the fabrication of reusable nozzles for propulsion.
Diletta Sciti, Antonio Vinci, Luca Zoli, Pietro Galizia, Simone Failla, Stefano Mungiguerra, Giuseppe D. Di Martino, Anselmo Cecere, Raffaele Savino   +8 more
doaj   +1 more source

A novel approach for manufacturing of layered, ultra-refractory composites using pliable, short fibre-reinforced ceramic sheets

Journal of Advanced Ceramics, 2023
A new additive technique for manufacturing of short fibre-reinforced ultra-refractory ceramics is presented. This technique allows the fabrication of solvent-free, thin (~100 µm), flexible, and easy-to-handle sheets suitable for fabricating homogeneous ...
Matteo MOR, Antonio VINCI, Simone FAILLA, Pietro GALIZIA, Luca ZOLI, Diletta SCITI   +5 more
doaj   +1 more source

Transient liquid-phase to guide multiphase evolution in reactive-hot-pressed ZrB2–SiC–ZrC ceramics

Journal of Materiomics, 2020
In reactive-hot-pressed ZrB2–SiC–ZrC ceramics, ZrO2 was found to replace ZrC phase, hence leading to confusion in designing ultra-high-temperature ceramics (UHTCs).
Qiang Zheng, Hui Gu, Dong-Li Hu, Guo-Jun Zhang   +3 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

Optimal Process Parameters for a Thermal-Sprayed Molybdenum-Reinforced Zirconium Diboride Composite on a Dummy Substrate

Energies, 2022
Thermal spray is an effective process for the fabrication of a metal matrix composite (MMC), where a zirconium diboride reinforcement is embedded in a molybdenum matrix to enable the combining of favorable properties in a new composite.
Muftah M. Mihoob, Haetham G. Mohammed, Thar Mohammed Badri Albarody, Faiz Ahmad, Mohamad Sahban Alnarabiji   +4 more
doaj   +1 more source