Synthesis and sintering of tungsten tetraboride and tantalum-bearing tungsten tetraboride under ultra high temperature and high pressure

Wang, Wenqiang; Peng, Fang; Liang, Hao; Guan, Shixue; Liang, Wenjia; Zhang, Lu; Huang, Mengyang; Tang, Youqi; He, Duanwei

doi:10.1016/j.ijrmhm.2021.105701

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…Possible reasons may be an inaccurate match of the phase composition of the analyzed material and the larger particle size (about 100 μm) . Wang et al synthesized samples of higher tungsten boride and showed a higher oxidation temperature of 588 °C compared to our results due to the usage of bulk sintered ceramic samples with larger grains. In ref , samples made of WB 2 particles of both micron and submicron range are characterized by the temperature of the maximum oxidation rate of 633 °C .…”

Section: Resultscontrasting

confidence: 67%

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

et al. 2022

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We proposed an efficient method toward the synthesis of higher tungsten boride WB5–x in the vacuumless direct current atmospheric arc discharge plasma. The crystal structure of the synthesized samples of boron-rich tungsten boride was determined using computational techniques, showing a two-phase system. The ab initio calculations of the energies of various structures with similar X-ray diffraction (XRD) patterns allowed us to determine the composition of the formed higher tungsten boride. We determined the optimal parameters of synthesis to obtain samples with 61.5% WB5–x by volume. The transmission electron microscopy measurements showed that 90% of the particles have sizes of up to 100 nm, whereas the rest of them may have sizes from 125 to 225 nm. Our study shows the possibility of using the proposed vacuumless method as an efficient and inexpensive way to synthesize superhard WB5–x without employing resource-consuming vacuum techniques.

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Section: Resultscontrasting

confidence: 67%

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

et al. 2022

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“…Notably, excessive B can weaken the content of BP according to the diffraction peaks and the same phenomenon occurs in WB 4 . [29] In previous experiments, [6] the synthesis temperature is at 800 • C. Therefore, the phase diagram of BP is depicted in Fig. 2(d).…”

Section: Stability In B-rich and P-rich Environmentsmentioning

confidence: 98%

Stability and melting behavior of boron phosphide under high pressure

Liang 梁,

Xiang 向,

Li 李

et al. 2024

Chinese Phys. B

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Boron Phosphide (BP) has gained significant research attention due to its unique photoelectric and mechanical properties. In this study, we investigated the stability of BP under high pressure using X-ray diffraction (XRD) and scanning electron microscope (SEM). The phase diagram of BP was explored in both B-rich and P-rich environments, revealing crucial insight into its behavior at 5.0 GPa. Additionally, we measured the melting curve of BP from 8.0 GPa to 15.0 GPa. Our findings indicate the stability of BP under high pressure will be improved within B-rich and P-rich environments. Furthermore, we reported a remarkable observation of melting curve frustration at 10.0 GPa. This study will enhance our understanding of stability of BP under high pressure, shedding light on its potential application in semiconductor, thermal, and light-transmitting devices.

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“…25,26,33−35 Thus, the methodological advancement toward synthesizing high-quality tungsten borides is highly desired to address the aforementioned issues in this important class of materials. High-pressure (P) synthesis is a proven effective approach for preparing TM borides 10,36,37 because pressure can effectively prompt the role of d-electrons in chemical bonding with boron. Also noted is that the thermal stabilities of TM borides can profoundly be enhanced under pressure to resist against decomposition, allowing preparing borides at extended high temperatures.…”

Section: ■ Introductionmentioning

confidence: 99%

“…High-pressure ( P ) synthesis is a proven effective approach for preparing TM borides ,, because pressure can effectively prompt the role of d -electrons in chemical bonding with boron. Also noted is that the thermal stabilities of TM borides can profoundly be enhanced under pressure to resist against decomposition, allowing preparing borides at extended high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Phase Evolutions, and Stabilities of Boron-Rich Tungsten Borides at High Pressure

Zhou

et al. 2022

Inorg. Chem.

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Boron-rich tungsten borides such as WB2+x and WB3+x have been highly expected to be superhard with many advantages over conventional superhard materials. However, because the formation of boron-rich tungsten borides is thermodynamically unfavorable at ambient pressure, their crystal structures, compositions, and properties are largely unexplored, which have impeded the rational design of functional materials in the W–B family. In this work, using unique high-pressure reactions, we report a systematic synthesis study of challenging compounds of tungsten borides including WB, WB2+x , and WB3+x . The use of pressure, combined with the controllable temperature, heating duration, and ratios of starting reactants, leads to different compositions and structures of final products with largely tunable crystallite size from nanocrystalline to single-crystal forms. In addition, the optimal conditions for the formation of WB3+x are well investigated by tuning the temperature and starting ratio of reactants, as well as by adding a solvent material. Phase diagrams and stabilities of the involved W–B compounds are also well depicted, which would provide an important guidance for future exploratory synthesis and study of the family of transition-metal borides.

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Synthesis and sintering of tungsten tetraboride and tantalum-bearing tungsten tetraboride under ultra high temperature and high pressure

Cited by 13 publications

References 31 publications

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Stability and melting behavior of boron phosphide under high pressure

Synthesis, Phase Evolutions, and Stabilities of Boron-Rich Tungsten Borides at High Pressure

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Synthesis and sintering of tungsten tetraboride and tantalum-bearing tungsten tetraboride under ultra high temperature and high pressure

Cited by 13 publications

References 31 publications

Efficient Synthesis of WB5–x–WB2 Powders with Selectivity for WB5–x Content

Efficient Synthesis of WB5–x–WB2 Powders with Selectivity for WB5–x Content

Stability and melting behavior of boron phosphide under high pressure

Synthesis, Phase Evolutions, and Stabilities of Boron-Rich Tungsten Borides at High Pressure

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Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content