Results 1 to 10 of about 113 (94)
Stability Evaluation of Candidate Precursors for Chemical Vapor Deposition of Hafnium Diboride (HfB2) [PDF]
ACS Omega, 2021 Alternative candidate precursors to [Hf(BH4)4] for low-temperature chemical vapor deposition of hafnium diboride (HfB2) films were identified using density functional theory simulations of molecules with the composition [Hf(BH4)2L2], where L = -OH, -OMe, -O-t-Bu, -NH2, -N=C=O, -N(Me)2, and -N(CH2)5NH2 (1-piperidin-2-amine referred to as Pip2A ...
Jessica M. Rimsza +3 more
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Experimental and Computational Studies of Compression and Deformation Behavior of Hafnium Diboride to 208 GPa. [PDF]
Materials (Basel), 2022 The compression behavior of the hexagonal AlB2 phase of Hafnium Diboride (HfB2) was studied in a diamond anvil cell to a pressure of 208 GPa by axial X-ray diffraction employing platinum as an internal pressure standard. The deformation behavior of HfB2 was studied by radial X-ray diffraction technique to 50 GPa, which allows for measurement of maximum
Burrage K, Lin CM, Chen CC, Vohra YK.
europepmc +3 more sources
Numerical Simulation for Thermal Shock Resistance of Thermal Protection Materials Considering Different Operating Environments [PDF]
The Scientific World Journal, 2013 Based on the sensitivities of material properties to temperature and the complexity of service environment of thermal protection system on the spacecraft, ultrahigh-temperature ceramics (UHTCs), which are used as thermal protection materials, cannot ...
Weiguo Li +3 more
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Materials and Design, 2021 Being one of the hardest materials known in nature, boron carbide (B4C) suffers from severe degradation of mechanical properties when subjected to external pressure or shear stress, which hinders its application in metal forming and machining industries.
Ming Lou, Xiaolong Chen, Keke Chang
exaly +3 more sources
Research on the Synthesis of Hafnium Diboride via Molten Salts
Kuangchan zonghe liyongThis 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
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Consolidation and Oxidation of Ultra Fine WC-Co-HfB2 Hard Materials by Spark Plasma Sintering [PDF]
Archives of Metallurgy and Materials, 2021 In this study, a novel composite was fabricated by adding the Hafnium diboride (HfB2) to conventional WC-Co cemented carbides to enhance the high-temperature properties while retaining the intrinsic high hardness.
Hyun-Kuk Park +4 more
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Thermoelectric properties of boron carbide/HfB2 composites
Materials for Renewable and Sustainable Energy, 2017 Boron carbide/hafnium diboride composites were prepared by spark plasma sintering of a mixture of hafnium diboride and boron carbide powders. Boron carbide was prepared with a 13.3 at.% composition of carbon, known as the ideal carbon content to maximize
Jon-L. Innocent +5 more
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PROCESSING AND PROPERTIES OF BORON CARBIDE WITH HAFNIUM DIBORIDE ADDITION [PDF]
Ceramics - Silikaty, 2016 This article presents the results of investigations on densification, mechanical and electrical properties of boron carbide (B₄C) with the addition of HfB₂. High dense B₄C-HfB₂ (2.5-30 wt.%) composites were prepared by hot pressing at a temperature of 2173 K with 40 MPa mechanical pressure.
K. Sairam +7 more
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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 +3 more
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Hafnium Diboride as a saturable absorber for Q-switched lasers
Journal of Modern Optics, 2019 Hafnium diboride (HfB2) is used in hypervelocity re-entry vehicles (such as intercontinental ballistic missile (ICBM) or ICBM heat shields), nuclear reactors and aerodynamic leading edges because o...
Haque, A, Morshed, M, Hattori, HT
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