Magic high-pressure strengthening in tungsten carbide system

Zhang, Yuanfen; Kou, Zili; Wang, Zhiwei; Yang, Ming; Lu, Jingrui; Liang, Hao; Guan, Shixue; Hu, Qiwei; Gong, Hongxia; He, Duanwei

doi:10.1016/j.ceramint.2019.01.195

Cited by 27 publications

(6 citation statements)

References 45 publications

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“…Considering that the fracture toughness of Al 2 O 3 is independent of the grain size, the reason for the increased fracture toughness of the Al 2 O 3 ‐cBN‐hBN composite may be the microcracks 15 . It is well known that microcracks can improve toughness by dissipating the energy at the tip of the main crack 27,28 . Therefore, forming a reticulated crack structure in the high‐temperature sintered composites can further enhance the fracture toughness.…”

Section: Resultsmentioning

confidence: 99%

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Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors

Wang

Zhang

et al. 2022

Int J Applied Ceramic Tech

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Al 2 O 3 -cBN-hBN self-lubricating ceramics were synthesized by using a highpressure sintering method. The mapping relationships between sintering thermodynamic conditions, component content, and mechanical properties were established using the response surface method. The main factors influencing the mechanical properties are clarified. The formation mechanism of the excellent mechanical properties is explained. It is found that the undesired phase transformation from cBN to soft hBN can be effectively inhibited by using a low-temperature and high-pressure sintering process. Sintering temperatures improve the relative densities and elastic modulus of self-lubricating ceramic but have little effect on the hardness and fracture toughness. cBN content is the main factor affecting the mechanical properties of the composites. The microcracks developed during the high-pressure sintering process contribute to the fracture toughness of the composites.

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Section: Resultsmentioning

confidence: 99%

“…15 It is well known that microcracks can improve toughness by dissipating the energy at the tip of the main crack. 27,28 Therefore, forming a reticulated crack structure in the high-temperature sintered composites can further enhance the fracture toughness.…”

Section: Densification and Mechanical Propertiesmentioning

confidence: 99%

Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors

Wang

Zhang

et al. 2022

Int J Applied Ceramic Tech

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“…The results below demonstrate that our strategy is successful with HfC ceramics. On the one hand, the HPHT technique greatly reduces the sintering temperature of HfC; on the other hand, it also effectively improves the density of HfC by promoting the deformations of the crystal grains to produce a certain degree of defects, which is widely used in the synthesis of many refractory materials, such as diamond, cBN, and other transition metal carbides (ReB 2 , WC, and TaC). − In the present work, we consolidated a series of HfC ceramics by HPHT. The samples were characterized in terms of their density, microstructure, deformation behavior, mechanical properties, and oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Achieving Dislocation Strengthening in Hafnium Carbide through High Pressure and High Temperature

et al. 2021

Self Cite

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Dislocations profoundly impact the mechanical behavior of materials. High dislocation density induced strengthening is easily achieved in metallic materials, but it is a challenge in ceramics. Here, we highlight the dislocation engineering of an ultrahigh-temperature ceramic, hafnium carbide (HfC), by high-pressure and high-temperature (HPHT) consolidation. The microstructure and temperature-dependent high-pressure consolidation behaviors were systematically investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Our results reveal that pressure-induced intergranular strains promote the generation of high-density dislocations in multiple orientations near grain boundaries and finally enhance the hardness and oxidation resistance of the HfC ceramic. These findings elucidate that dislocation strengthening can be achieved in ultra-high-temperature ceramic HfC, which offers crucial insights for the design and synthesis of advanced ceramic materials.

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“…Micron tungsten carbide (WC) is a commonly used reinforcing particle due to its advantages of high stiffness and abrasiveness. 5 Therefore, the study used laser melting technology to prepare high entropy alloy composite coatings with different WC content particles, and tested and analyzed their microstructure and wear resistance. The study aims to upgrade the abrasiveness of mining machinery, increase the reliability of the machinery and extend parts' operation life, maximize the economic benefits of mechanical work.…”

Section: Introductionmentioning

confidence: 99%

“…The insertion of ceramic pellets to the laser melting of high‐entropy alloy coatings is an efficacious approach to upgrade the wear resistance of the coatings. Micron tungsten carbide (WC) is a commonly used reinforcing particle due to its advantages of high stiffness and abrasiveness 5 . Therefore, the study used laser melting technology to prepare high entropy alloy composite coatings with different WC content particles, and tested and analyzed their microstructure and wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Study on tribological properties of high entropy alloy composite coatings with different tungsten carbide contents in laser cladding

Chen¹

2023

Adv Control Appl

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The severe working conditions of mining machinery make the wear of its parts extremely serious, thus reducing its service life, increasing the probability of accidents, and may cause huge economic wastage. So promoting the improvement of mining machinery is imperative, and the melting of wear‐resistant layer on the surface of wear‐prone equipment is a more effective improvement method. The study was performed by laser fusing a composite coating of CoCrFeNiMn high‐entropy alloy with different WC contents, and a second phase was generated in the coating by an additive method to achieve the strengthening of the coating. The experiments revealed that all the coatings had FCC phase as the main phase by analyzing the phase conformation, structure, stiffness, and abrasiveness. When the WC dosage exceeded 20 wt.%, Fe3W3 (M6C) carbide reinforced phases with different morphologies were produced in the coatings. Forty wt.% of the coatings showed the highest hardness, which was 3.1 times better than that of the coatings without WC particles, and 30 wt.% of the coatings showed the best abrasiveness. HT0 coatings showed the least friction factor of 0.27. HT600 and HT800 corresponded to friction factors of 0.37 and 0.35, respectively. The coefficient of friction of the coating was most stable after about 3 min at room temperature, and the wear phase took longer after annealing. During the break‐in phase, the precipitated phase has a supportive effect and prolongs the break‐in period. The coating using the studied method improves the wear resistance of mechanical parts and extends their service life, which has some economic and practical value.

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Magic high-pressure strengthening in tungsten carbide system

Cited by 27 publications

References 45 publications

Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors

Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors

Achieving Dislocation Strengthening in Hafnium Carbide through High Pressure and High Temperature

Study on tribological properties of high entropy alloy composite coatings with different tungsten carbide contents in laser cladding

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Magic high-pressure strengthening in tungsten carbide system

Cited by 27 publications

References 45 publications

Analysis of mechanical properties of Al2O3‐cBN‐hBN composites and identification of main influencing factors

Analysis of mechanical properties of Al2O3‐cBN‐hBN composites and identification of main influencing factors

Achieving Dislocation Strengthening in Hafnium Carbide through High Pressure and High Temperature

Study on tribological properties of high entropy alloy composite coatings with different tungsten carbide contents in laser cladding

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Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors

Analysis of mechanical properties of Al₂O₃‐cBN‐hBN composites and identification of main influencing factors