Results 31 to 40 of about 951 (206)

بررسی مقاومت به اکسیداسیون کامپوزیت چهارجزئی HfB2-HfC-TiC-B4C [PDF]

نشریه مهندسی متالورژی و مواد
در این پژوهش به بررسی مقاومت به اکسایش کامپوزیت های چهار جزیی HfB2-HfC-TiC-B4C با نسبت های مولی برابر و 7:1:1:1 با و بدون نایوبیوم پرداخته شده است. برای این منظور چهار کامپوزیت 70HfB2-HfC-TiC-B4C، 70HfB2-HfC-TiC-B4C/Nb، HfB2-HfC-TiC-B4C و HfB2-HfC-TiC ...
پریسا چناری, زهره بلک, وحیده شاهدی فر   +2 more
doaj   +1 more source

Synthesis and growth mechanism of highly crystalized multi-branched HfB2 microrods with self-toughening effect

Materials & Design
Development of strategies to toughen HfB2 ceramic, improve their mechanical properties is the key to promote their applications in extreme thermal environments.
Kewei Li, Zhulin Huang, Jieyan Yuan, Xinyang Li, Zhen Wang, Mengen Hu, Tianxu Wang, Xiaoye Hu, Yue Li, Xinghong Zhang   +9 more
doaj   +1 more source

High temperature creep of 20 vol.% SiC-HfB2 UHTCs up to 2000 °C [PDF]

, 2017
High temperature compressive creep of SiC-HfB2 UHTCs up to 2000 °C has been studied. Microstructural analysis after deformation reveals formation of new phases in the Hf-B-Si and Hf-B-Si-C systems, which are responsible for the poor creep resistance.
Lee, W. E., Zapata Solvas, E., Domínguez-Rodríguez, A., Gómez-García, Diego, Dominguez-Rodriguez, A, Zapata-Solvas, E., Zapata-Solvas, E, D. Gómez-García, Domínguez Rodríguez, Arturo, W.E. Lee, Gomez-Garcia, D, Lee, WE, Gómez García, Diego, A. Domínguez-Rodríguez, E. Zapata-Solvas   +14 more
core   +1 more source

Structure, Mechanical Properties, and High-Temperature Stability of ZrB2- and HfB2-Based Materials

, 2023
The structure, mechanical characteristics, and high-temperature stability in vacuum and air of ZrB2 and HfB2-based materials sintered at a high quasi-hydrostatic pressure (4.1 GPa) under hot pressing (at a pressure of 30 MPa) with and without SiC and ...
Borymskyi, O. I., Yasar, Zeynep Ayguzer, Prisyazhna, O. V., Lokatkina, A. S., Rucki, M., Büchner, B., Kluge, R., Haber, R., Matović, Branko, Werner, J., Ponomaryov, S. S., Bondar, A. A., Prikhna, T. O., Moshchil, V. E., Devin, L. M., Rychev, S. V., Barvitskyi, P. P., Karpets, M. V.   +17 more
core   +1 more source

EPR investigation of point defects in HfB2 and their roles in supercapacitor device performances

, 2022
Boron-based materials have various attractive properties and gained increased attention in recent years as promising materials for energy storage applications. Despite vast literature on structural and mechanical properties of transition metal diborides,
Merve Buldu-Akturk, Erdem, Emre, Aktürk, Merve, Balcı-Çağıran, Özge, Emre Erdem, Özge Balcı-Çağıran   +5 more
core   +1 more source

Screw dislocation assisted spontaneous growth of HfB2 tubes and rods

, 2015
The mechanism of anisotropic growth of HfB2 rods has been discussed in this study. HfB2 powder has been synthesized via a sol-gel-based route using phenolic resin, hafnium chloride, and boric acid as the source of carbon, hafnium, and boron respectively,
J.G.P. Binner (7121612), Anish Paul, Daniel Doni Jayaseelan, Venugopal, Saranya, Peter M. Brown, Jayaseelan, Daniel Doni, Saranya Venugopal (7124624), Vaidhyanathan, Bala, Binner, JGP; id_orcid, Anish Paul (7124552), Brown, Peter M., Vaidhy Vaidhyanathan (1247964), Saranya Venugopal, Paul, Anish, Jon G. P. Binner, Binner, Jon G. P., Daniel Doni Jayaseelan (7126451), Peter M. Brown (7125803), Bala Vaidhyanathan, Fahrenholtz, W.   +19 more
core   +1 more source

Room-Temperature Mechanochemical Synthesis and Consolidation of Nanocrystalline HfB2-HfO2 Composite Powders [PDF]

, 2018
This study reports on the in-situ preparation of HfB2-HfO2 composite powders at room temperature by means of mechanochemical synthesis (MCS) from HfCl4-B2O3-Mg powder blends.
Akçamlı, Nazlı, Ovecoglu, M. L., Agaogullari, D., Balci, O., Akcamli, N., Duman, I   +5 more
core   +1 more source

Research on the Synthesis of Hafnium Diboride via Molten Salts

Kuangchan zonghe liyong
This is an article in the field of metallurgical engineering. High purity hafnium diboride (HfB2) powders were synthesized from hafnium oxide (HfO2) and boron carbide (B4C) powders via sodium chloride as the molten salt through boron/carbon thermal ...
Chong YU, Can LIU, Yiran PU, Hao WU
doaj   +1 more source

Zirconium‐Based High Emissivity Multilayer Coating for Carbon/Carbon Composite With Enhanced Ablation Resistance

International Journal of Applied Ceramic Technology, Volume 23, Issue 3, June 2026.
ABSTRACT A multilayer coating system was developed as an ablation and thermal protection measure for C/C composites. The multilayer coating architecture consists of SiC, ZrB2‐SiC (ZBS), and ZrC‐ZrO2 (ZZC) sublayers with a Sm2O3‐ZrO2 (SZC) topcoat.
Abdullah Al Saad, Michael Helminiak, Molly M. O'Connor, Michael Brennan, Carlos J. Martinez, Rodney W. Trice   +5 more
wiley   +1 more source

Intrinsic Thermal Transport Properties of ZrB2 From Room Temperature to Melting Point

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Zirconium diboride (ZrB2) is a promising material for extreme‐environment applications, yet its intrinsic high‐temperature thermophysical behavior remains uncertain: Experiments are highly sensitive to processing conditions, simulations omit key mechanisms, and both rarely reach ultrahigh temperatures. Here, we predict the thermal conductivity
Yeojin Lee, Qihao Xu, Hyejin Jang, Tianli Feng   +3 more
wiley   +1 more source