Results 71 to 80 of about 951 (206)

Effects of Gd2O3 Content on the Infrared Emissivity and Ablation Resistance of HfB2/SiC/TaSi2 Coating at 4400 kW/m2

, 2023
To improve the infrared emissivity and the ablation resistance of HfB2/SiC/TaSi2 coatings for serving in heat flux of 4400 kW/m2, HfB2/SiC/TaSi2 coatings with different contents of high-emissivity Gd2O3 were prepared using atmospheric plasma spraying ...
Jianxiao Lu, Mingshao Xie, Yanbo Liu, Shizhen Zhu   +3 more
core   +1 more source

FABRICATION OF FULLY DENSE ZrB2- AND HfB2-BASED ULTRA HIGH TEMPERATURE CERAMICS BY COMBINING SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS AND SPARK PLASMA SINTERING

Chemical Engineering Transactions, 2009
Not available.
R. Licheri, R. Orru', C. Musa, G. Cao
doaj   +1 more source

Environmental conical nozzle levitator equipped with dual wavelength lasers

Journal of the American Ceramic Society, Volume 107, Issue 3, Page 2010-2023, March 2024.
Abstract The environmental conical nozzle levitator (E‐CNL) with dual‐wavelength lasers is an extreme environment materials characterization system that was designed to investigate ultra‐high‐temperature materials: refractory metals, oxides, carbides, and borides above 3000 K in a controlled atmosphere.
Fox Thorpe, Trevor Li, Richard Weber, Scott J. McCormack   +3 more
wiley   +1 more source

Research Progress in Oxidation-Resistant and Ablation-Resistant Ultrahigh-Temperature Ceramic Coatings [PDF]

Cailiao Baohu
With the rapid development of hypersonic flight vehicles and advanced aerospace propulsion systems，key hot-end components such as nose cones，wing leading edges，and nozzle throat liners are subjected to long-term extremely coupled environments involving ...
LIU Zhizhang, LIU Ming, LI Xuan, ZHENG Ting, ZHANG Xuyi, ZHANG Lijing, SUN Shihan
doaj   +1 more source

Phase and Microstructural Correlation of Spark Plasma Sintered HfB2-ZrB2 Based Ultra-High Temperature Ceramic Composites

, 2017
The refractory diborides (HfB2 and ZrB2) are considered as promising ultra-high temperature ceramic (UHTCs) where low damage tolerance limits their application for the thermal protection system in re-entry vehicles.
Kantesh Balani, Ambreen Nisar
core   +1 more source

Differential expression of the vegetative and spore-bound hydrophobins of Trichoderma reesei cloning and characterization of the Hfb2 gene

, 1996
The hfb2 gene encoding the hydrophobin HFBII of the filamentous fungus Trichoderma reesei was isolated by heterologous hybridization using the vegetative hydrophobin I, hfb1, gene of T. reesei as a probe. The hfb2 gene codes for a typical fungal secreted
Nakari-Setälä, Tiina, Muñoz, Gastón, Aro, Nina, Kalkkinen, Nisse, Penttilä, Merja; id_orcid, Ilmen, Marja   +5 more
core   +1 more source

Densification of Hot-Pressed HfB2 Ceramics with Carbon and B4C Additions

, 2007
Hafnium diboride was densified below 2000°C using B4C and carbon additions. Attrition milled HfB2 containing no sintering additives was hot pressed to \u3e99% relative density at temperatures 2000°C.
Brown-Shaklee, Harlan J., Fahrenholtz, William, Hilmas, Greg   +2 more
core  

HfB2-SiC-MoSi2 oxidation resistance coating fabricated through in-situ synthesis for SiC coated C/C composites [PDF]

, 2017
A brand new HfB2-SiC-MoSi2 coating was fabricated to protect carbon/carbon (C/C) composites with inner SiC coating from oxidation, which was prepared by in-situ synthesis.
Yuan, Ruimei, Xuanru Ren, Yulei Zhang, Peipei Wang, Hou, Xianghui, Xianghui Hou, Hejun Li, Wang, Peipei, Li, Hejun, Ren, Xuanru, Ruimei Yuan, Zhang, Yulei   +11 more
core   +1 more source

Ultra-fast synthesis and composition-dependent formation behavior of (HfxZr1−x)B2 solid solution nanopowders

Journal of Advanced Ceramics
Ultrafine boride solid solutions offer immense potential for extreme environmental applications, yet their rapid synthesis with nanoscale compositional control remains a challenge.
Sen Yang, Zhengang Zhang, Yanqin Fu, Tao Li, Liyuan Han, Lingxiang Guo, Hang Yu, Jianhua Zhang, Wei Xie, Hailong Wang, Yulei Zhang   +10 more
doaj   +1 more source

Creep of HfB2-based UHTCs up to 2000oC

, 2017
Ultra-high temperature ceramics (UHTCs) are promising candidates for hypersonic applications as a consequence of their high melting points, in excess of 3000 ºC for ZrB2 and HfB2 UHTCs. The UHTCs community has traditionally focused on development of more
Feng, Lun, Lee, See Hun, Lee, Bill, Zapata-Solvas, Eugenio, Dominguez-Rodriguez, Arturo, Liu, Chenchen, Gomez-Garcia, Diego, Grasso, Salvatore, Reece, Mike   +8 more
core