Physical properties of high-temperature sintered TaB2 under high pressure

Zhang, Zhengang; Liang, Hao; Chen, Haihua; Ding, Lanfang; Song, Minqing; Juwei, Wang

doi:10.1016/j.ceramint.2020.12.029

Cited by 10 publications

(5 citation statements)

References 41 publications

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“…The UHPS‐ZrB 2 started to show obvious oxidation at the temperature of 1100 °C, which was much higher than that of SPS‐ZrB 2 (850 °C) and other reported ultra‐high temperature ceramics such as TaB 2 (930 °C), ZrB 2 (800 °C), and HfC (700–900 °C). [ 48–54 ]…”

Section: Resultsmentioning

confidence: 99%

“…The UHPS-ZrB 2 started to show obvious oxidation at the temperature of 1100 °C, which was much higher than that of SPS-ZrB 2 (850 °C) and other reported ultra-high temperature ceramics such as TaB 2 (930 °C), ZrB 2 (800 °C), and HfC (700-900 °C). [48][49][50][51][52][53][54] According to the results of oxidation behavior analysis, UHPS-ZrB 2 and SPS-ZrB 2 were thermally annealed for 0.5 h respectively at 1100 and 850 °C in air atmosphere in a muffle furnace to compare the microstructure evolution and elemental distributions after oxidation.…”

Section: The Promotion Of Oxidation Resistancementioning

confidence: 99%

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Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Guo

et al. 2022

Advanced Science

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Zirconium diboride (ZrB2) is considered as one of the most promising ultra‐high temperature materials for the applications in extreme environments. However, the difficulty in fabrication of ZrB2 limits its industrial applications. In this study, fully dense and grain‐refined ZrB2 is prepared under ultra‐high pressure of 15 GPa at low temperature of 1450 °C. The as‐prepared ZrB2 exhibits excellent mechanical and oxidation‐resistant properties. Compared with raw powder, the grain size decreases 56%. Compared with high‐temperature sintered control specimen beyond 2000 °C, the hardness and fracture toughness increase about 46% and 69%, respectively, the dislocation density increase 3 orders of magnitude, while the grain size considerably decrease 96%. According to work hardening, Hall–Petch and Taylor dislocation hardening effects, the refined grains, substructures, and high dislocation density caused by plastic deformation during sintering can enhance the mechanical properties. The unique structure contributes to a threshold oxidation temperature increase of ≈250 °C relative to the high‐temperature sintered ZrB2, achieving one of the highest values (1100 °C) among the reported monolithic ultra‐high temperature ceramics. A developed densification mechanism of dislocation multiplication with grain refining is proposed and proved to dominate the sintering, which is responsible for simultaneous improvements in mechanical and oxidation‐resistant properties.

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Section: Resultsmentioning

confidence: 99%

Section: The Promotion Of Oxidation Resistancementioning

confidence: 99%

Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Guo

et al. 2022

Advanced Science

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“…Therefore, several new opportunities for researchers are available to successfully realize the great potential that this class of materials has to offer. Theoretical reports have already predicted these borides to be useful for unique applications such as ferromagnetism, coating films, spintronic devices, optical materials, functional ceramics, , and also novel catalysts. , The ensuing section of this review will detail some of the applications that have been realized.…”

Section: Other Diboridesmentioning

confidence: 99%

Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends

et al. 2022

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Transition-metal diborides are a class of abundantly available ceramic materials that exhibit a landscape of rich properties such as extraordinary high strength, exceptional hardness, and high-melting points. To date, these materials have been investigated primarily for their bulk scale properties. Many of these transition-metal diborides adopt an AlB2-type structure. In this type of structure, the metal atoms are sandwiched between alternating layers of boron atoms. Examples of these types of borides include, magnesium diboride (MgB2), titanium diboride (TiB2), chromium diboride (CrB2), etc. The AlB2-type structure is appealing for a plethora of reasons, primary among them is the inherent presence of boron atoms arranged in a honeycomb pattern reminiscent of the graphenic arrangement. This provides an opportunity to access two-dimensional (2D) boron. Recent research trends indicate a rising interest in nanoscaling these borides to yield 2D nanostructures. Research groups across the globe are currently pursuing this very objective, and multiple reports have already emerged showing that it is possible to nanoscale these bulk AlB2-type borides into nanosheets. One of the routes that researchers have adopted to this end is the well-recognized, top-down exfoliation. This involves methods such as liquid-phase exfoliation, mechanical exfoliation, and chemically induced selective extraction. This review will chronicle the research evolution of top-down exfoliation of metal borides from a physicochemical context and present the reader with a summary of these methods and the associated findings. We will also briefly discuss the various areas where these nanoscaled metal borides have just started finding applications toward sustainable technologies and present our perspective on where the field is headed. We hope that this review will be a timely addition to the fast-evolving literature on nanoscaling metal borides.

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“…This heightened pressure enhances density and lowers the temperature threshold for grain growth, thereby ameliorating brittleness and bolstering the mechanical properties of the sintered ceramics. [29][30][31] The majority of prior studies are primarily concentrated on aspects such as nanowires and thin films, with limited attention directed toward the bulk TaSi 2 ceramic samples. Consequently, to optimize and enhance the practical applications of silicide ceramics, it is imperative to examine the physical properties, including microstructures, Young's modulus, Vickers hardness, and electrical conductivity, of dense bulk TaSi 2 ceramic.…”

Section: Introductionmentioning

confidence: 99%

“…A one‐stage increase system is employed to raise the pressure to 5.5 GPa, a significant elevation compared to the pressure exerted in SPS (<1 GPa). This heightened pressure enhances density and lowers the temperature threshold for grain growth, thereby ameliorating brittleness and bolstering the mechanical properties of the sintered ceramics 29–31 . The majority of prior studies are primarily concentrated on aspects such as nanowires and thin films, with limited attention directed toward the bulk TaSi 2 ceramic samples.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional tantalum disilicide ceramics sintered at high temperature and high pressure

Yu,

He,

Zhang

et al. 2023

J Am Ceram Soc.

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Silicide ceramics are attracted significant attention due to their exceptional physical properties. However, their inherent brittleness at room temperature limits their practical applications. Here, we aim to improve the mechanical properties of tantalum disilicide (TaSi2) ceramics by modifying the preparation methods and sintering conditions. We fabricate the dense TaSi2 ceramics using high‐pressure and high‐temperature (HPHT) sintering technology at 5.5 GPa and 800–1300°C. We characterize the microstructures, mechanical, and electronic properties of bulk TaSi2 ceramics at HPHT conditions. Our results indicate an enhancement in the fracture toughness of 11.97 MPa m1/2 for TaSi2 ceramics. More importantly, the electrical conductivity (47.13 × 105 S/m) of TaSi2 ceramic is increased and verified by theoretical calculations. These findings provide crucial insights for future applications of TaSi2 and offer valuable avenues for the design and synthesis of advanced ceramic materials.

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Physical properties of high-temperature sintered TaB2 under high pressure

Cited by 10 publications

References 41 publications

Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends

Multifunctional tantalum disilicide ceramics sintered at high temperature and high pressure

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Physical properties of high-temperature sintered TaB2 under high pressure

Cited by 10 publications

References 41 publications

Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation

Quasi-Two-Dimensional Nanostructures from AlB2-Type Metal Borides: Physicochemical Insights and Emerging Trends

Multifunctional tantalum disilicide ceramics sintered at high temperature and high pressure

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Product

Resources

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Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends