Results 21 to 30 of about 951 (206)
Materials & 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.
Leilei Chen +8 more
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Densification of ultra-refractory transition metal diboride ceramics [PDF]
Science of Sintering, 2020 The densification behavior of transition metal diboride compounds was reviewed with emphasis on ZrB2 and HfB2. These compounds are considered ultra-high temperature ceramics because they have melting temperatures above 3000°C.
Fahrenholtz W.G. +2 more
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Synthesis of equimolar solid solution of zirconium and hafnium diborides by vacuum-thermal routes
Open Ceramics, 2023 We explored the Zr₁₋ₓHfₓB₂ system with first-principles cluster expansion and thermodynamic analysis of possible reactions targeting the synthesis in vacuum-thermal conditions.
O. Vasiliev +8 more
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HfB2-doped ZrB2-30 vol.% SiC composites: oxidation resistance behavior
Materials Research Express, 2021 To investigate the HfB _2 on microstructure and oxidation resistance of ZrB _2 -30 vol% SiC, ZrB _2 -30 vol% SiC composites with different amounts of HfB _2 (4, 8, and 12 vol%) were consolidated by Spark Plasma Sintering method (SPS).
Ebrahim Dodi +2 more
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Molten salt synthesis, formation mechanism, and oxidation behavior of nanocrystalline HfB2 powders
Journal of Advanced Ceramics, 2020 Nanocrystalline HfB2 powders were successfully synthesized by molten salt synthesis technique at 1373 K using B and HfO2 as precursors within KCl/NaCl molten salts.
Da Liu, Qiangang Fu, Yanhui Chu
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Effect of Milling Time on the Microstructure and Mechanical Properties of HfB2-ZrB2-TiB2 Sintered via SPS [PDF]
Journal of Advanced Materials in EngineeringThe aim of this research was to investigate the effect of milling time on the properties of HfB2-ZrB2-TiB2 ceramic. For this purpose, HfB2, ZrB2, and TiB2 powders with equal volume ratios were ground for 15, 30, and 45 hours and sintered using spark ...
A. Masdar, Z. Balak
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Journal of Materials Research and Technology, 2023 This study explains the synthesis mechanism of (HfTiZrMnCr)B2 high entropy diboride ceramics prepared via a combined route consisting of ball milling and spark plasma sintering.
İlayda Süzer +9 more
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Comparison of ZrB2-SiC, HfB2-SiC and HfB2-SiC-Y2O3 oxidation mechanisms in air using LIF of BO2(g) [PDF]
Corrosion Science, 2020 Abstract The oxidation behaviour of ZrB2-SiC, HfB2-SiC and HfB2-SiC-Y2O3 is studied using the real-time Laser-Induced Fluorescence (LIF) detection of BO2(g) evaporated from samples heated up to 1873K in dry air. For each composition, the relevant steps of oxidation (silica formation, volatilization, etc.) can be precisely determined.
V. Guérineau +3 more
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Materials Research Express, 2021 HfB _2 -SiC composites were fabricated by the introduction of carbon fibres to meet the mechanical requirements, and hot pressing was the sintering route.
Yaxi Chen
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Zhongguo shipin weisheng zazhi, 2021 ObjectiveTo develop an analytical method for determination of masked fumonisins in cereals by isotope dilution-ultra high performance liquid chromatography-tandem mass spectrometry.MethodsThe samples were extracted and diluted for determination of ...
ZHANG Shuo +3 more
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