TiB<sub>2</sub>-reinforced B<sub>4</sub>C composites produced by reaction sintering at high-pressure and high temperature

Wang, Xiaonan; Tang, Qiang; Han, Yang; Hu, Qiuyang; Cheng, Jiaen; Jia, Hongsheng; Zhu, Pinwen

doi:10.1080/08957959.2020.1747451

Cited by 4 publications

(5 citation statements)

References 24 publications

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“…4 Despite the high Vickers hardness (~30 GPa), a rather low fracture toughness was observed in B 4 C ceramics (e.g., 2.1 MPa•m 1/2 ), 4 which greatly limited the potential applications.The introduction of the reinforcing phase to B 4 C could effectively improve the densification and mechanical performance, among which titanium boride (TiB 2 ) is the most commonly used due to the good chemical compatibility with B 4 C (at high temperature) and its own excellent mechanical properties. [5][6][7][8] It was proved that B 4 C-TiB 2 ceramics demonstrated both high hardness of B 4 C phase and high toughness of TiB 2 , leading to the excellent workability. [9][10][11]…”

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confidence: 99%

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

et al. 2021

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B4C‐TiB2 ceramics (TiB2 ranging 5~70 vol%) with Mo‐Co‐WC as the sintering additive were prepared by spark plasma sintering. In comparison with B4C‐TiB2 without additive, the enhanced densification was evident in the sintered specimen with Mo‐Co‐WC additive. Core‐rim structured grain was observed around TiB2 grains. The interface of the rim between TiB2 and B4C phases demonstrated different feature: the inner borderline of the rim exhibited a smooth feature, whereas a sharp curved grain boundary was observed between the rim and the B4C grain. The formation mechanism is discussed: the epitaxial growth of (Ti,Mo,W)B2 rim around the TiB2 core may occur as a result of the solid solution and dissolution‐precipitation between TiB2 phase and the sintering additive. It was revealed that the fracture toughness increased as the content of TiB2 content increased, alongside the decreased hardness. B4C‐30 vol% TiB2 specimen demonstrated the optimal combination of mechanical properties, reaching Vickers hardness of 24.3 GPa and fracture toughness of 3.33 MPa·m1/2.

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confidence: 99%

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

et al. 2021

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“…Reactive sintering is a good method to fabricate high-performance composites. 16,17 For example, Zhao et al 14 prepared WB 2 -WB 3 -B 4 C composite by arc melting from powder mixtures of W and B 13 C 2 . In our previous work, the Vickers hardness of the WB 2 -B 4 C composite prepared by a combination of boro/carbothermal reduction and SPS techniques was found to be increased by 23 % compared with the monolithic WB 2 .…”

Section: Introductionmentioning

confidence: 99%

“…As bulk TMB 2 can be simultaneously synthesize and consolidate TMBs from elemental powders by SPS, if B 4 C powders is directly added into the mixed MT and B powders, the homogeneity of the obtained composite could be a problem. Reactive sintering is a good method to fabricate high‐performance composites 16,17 . For example, Zhao et al 14 .…”

Section: Introductionmentioning

confidence: 99%

In‐situ reaction sintered ReB₂–B₄C composite by reactive spark plasma sintering

Long,

Wang,

Zhang

et al. 2024

Int J Applied Ceramic Tech

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The high cost of ReB2 limits its application as a member of novel high‐hardness materials, which can be alleviated by forming composites with cheap compound(s). In the present study, a dense ReB2–B4C composite was fabricated via in situ reactive sintering by spark plasma sintering with Re and B13C2 (Re:B = 1:20) as raw materials. The phase composition, microstructure, Vickers hardness, and fracture toughness of the obtained composite were characterized, and the reaction mechanism, crack propagation, and toughening mechanism were clarified. XRD, SEM, Raman, and XPS results revealed that the obtained composite is mainly composed of ReB2 and B4C phases, with a small amount of free B and graphite coexisted. Vickers hardness of 33.5 ± 4.4 GPa under 0.49 N load and 24.6 ± 1.5 GPa under 4.9 N load and fracture toughness of 5.02 ± 0.37 MPa·m1/2 were observed for the obtained composite. The toughening mechanism of the obtained ReB2–B4C composite including crack deflection crack and cracking bridging was analyzed in detail.

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“…[12][13][14] Incorporating B 4 C as the second phase in TiB 2 substantially enhances the hightemperature mechanical properties of TiB 2 ceramics. [15][16][17] TiB 2 -B 4 C complex-phase ceramics demonstrate a heightened potential for application as cutting tools.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the elevated sintering temperature tends to induce abnormal growth in TiB 2 grains, resulting in the formation of microcracks that compromise its performance 12–14 . Incorporating B 4 C as the second phase in TiB 2 substantially enhances the high‐temperature mechanical properties of TiB 2 ceramics 15–17 . TiB 2 ‒B 4 C complex‐phase ceramics demonstrate a heightened potential for application as cutting tools.…”

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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TiB₂-reinforced B₄C composites produced by reaction sintering at high-pressure and high temperature

Cited by 4 publications

References 24 publications

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

In‐situ reaction sintered ReB₂–B₄C composite by reactive spark plasma sintering

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

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TiB2-reinforced B4C composites produced by reaction sintering at high-pressure and high temperature

Cited by 4 publications

References 24 publications

Dense and core‐rim structured B4C‐TiB2 ceramics with Mo‐Co‐WC additive

Dense and core‐rim structured B4C‐TiB2 ceramics with Mo‐Co‐WC additive

In‐situ reaction sintered ReB2–B4C composite by reactive spark plasma sintering

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

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Product

Resources

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TiB₂-reinforced B₄C composites produced by reaction sintering at high-pressure and high temperature

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

Dense and core‐rim structured B₄C‐TiB₂ ceramics with Mo‐Co‐WC additive

In‐situ reaction sintered ReB₂–B₄C composite by reactive spark plasma sintering

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