A novel mechanism of B4C-TiB2-graphite composites with high flexural strength by spark plasma sintering

Li, Shuai; Wang, Hailiang; Wang, Hailong; Fang, Cheng; Li, Wen; Ji, Chenchen; Zhang, Kai; Li, Mingliang; Shao, Gang; Fan, Bingbing; Xu, Hongliang; Lu, Hongxia; Zhang, Rui

doi:10.1016/j.mtcomm.2023.105935

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…TiB 2 ceramics exhibit exceptional properties, such as a high melting point (3225 • C), high hardness (∼32 GPa), a high modulus of elasticity (529 GPa), excellent wear resistance, and commendable chemical stability. [1][2][3][4][5][6][7] These characteristics enable their extensive applications in hightemperature wear-resistant components, crucibles, electrolytic electrodes, armor protection, and cutting tools. [8][9][10][11] Owing to TiB 2 's high melting point and low self-diffusion coefficient, achieving sintering densification in purephase TiB 2 ceramics is challenging, necessitating elevated sintering temperatures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Wang,

Ding,

Zhang

et al. 2024

Int J Applied Ceramic Tech

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A finite model incorporating microstructure was developed to investigate the thermal shock resistance of TiB2‒B4C composite ceramic cutting tool materials. Numerical simulations were conducted to analyze changes in the transient temperature field and thermal stress field during the thermal shock process. TiB2‒B4C composite ceramic tool materials were fabricated using discharge plasma sintering technology. With different B4C contents, different sintering temperatures and holding times as study variables, optimization of the sintering process parameters and ceramic material components was achieved through testing the mechanical and microscopic morphology of the ceramics. Thermal shock water quenching experiments were performed, and the strength‐decay method was employed to assess the thermal shock resistance of TiB2‒B4C ceramics. The findings indicate that the optimal sintering conditions are temperature of 1700°C and holding time of 5 min. The TiB2‒B4C ceramic material containing 20 vol% B4C exhibits superior comprehensive mechanical properties and thermal shock resistance, and its relative density, fracture toughness, hardness, and flexural strength were 99.3%, 6.8 MPa m1/2, 22.8 GPa, and 598 MPa, respectively. The critical thermal shock temperature difference falls within the range of 400°C‒500°C.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Wang,

Ding,

Zhang

et al. 2024

Int J Applied Ceramic Tech

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Toughening mechanism of B₄C/TiB₂ ceramic materials by in situ reaction via spark plasma sintering

Du,

Yi,

Chen

et al. 2024

Int J Applied Ceramic Tech

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To enhance the fracture toughness of B4C ceramics, B4C/TiB2 ceramics with excellent performance were prepared by using TiO2 as the addition item and using spark plasma sintering to introduce TiB2 based on in situ reaction, which was compared with ceramics directly introduced with TiB2, the impacts of TiO2 content, temperature and holding time on B4C/TiB2 ceramics were studied, and the toughening mechanism of B4C/TiB2 ceramics in situ reaction was discussed. The results showed that compared with the ceramics directly introduced with TiB2, B4C/TiB2 ceramics with reinforcement phase TiB2 introduced through in‐situ reaction were easier to obtain higher relative density and better properties. Due to the existence of a discharge effect and the application of pulse current, B4C/TiB2 ceramics with excellent comprehensive properties can be prepared at lower temperatures and short time. When 15 vol% TiO2 was added, the temperature was 1750°C and the holding time was 10 min, the comprehensive properties were better, and their relative density, Vickers hardness, flexural strength, and fracture toughness were 98.5%, 27.72 GPa, 474 MPa, and 5.08 MPa·m1/2, respectively. Toughening mechanisms such as crack deflection, crack branching, and crack bridging improved the fracture toughness.

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A novel mechanism of B4C-TiB2-graphite composites with high flexural strength by spark plasma sintering

Cited by 2 publications

References 38 publications

Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Toughening mechanism of B₄C/TiB₂ ceramic materials by in situ reaction via spark plasma sintering

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A novel mechanism of B4C-TiB2-graphite composites with high flexural strength by spark plasma sintering

Cited by 2 publications

References 38 publications

Mechanical properties and thermal shock resistance of TiB2‒B4C composite ceramic tool materials at microscopic scale

Mechanical properties and thermal shock resistance of TiB2‒B4C composite ceramic tool materials at microscopic scale

Toughening mechanism of B4C/TiB2 ceramic materials by in situ reaction via spark plasma sintering

Contact Info

Product

Resources

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Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Mechanical properties and thermal shock resistance of TiB₂‒B₄C composite ceramic tool materials at microscopic scale

Toughening mechanism of B₄C/TiB₂ ceramic materials by in situ reaction via spark plasma sintering