Effect of sintering temperature and TiB2 content on the grain size of B4C-TiB2 composites

Liu, Yingying; Li, Zhenqin; Peng, Yusi; Huang, Yihua; Huang, Zhengren; Zhang, Deku

doi:10.1016/j.mtcomm.2019.100875

Cited by 30 publications

(25 citation statements)

References 35 publications

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“…Besides, the SiC and TiB 2 grains locate at the boundaries of the B 4 C grains, pinning the boundaries of B 4 C grains and restrict the grain growth. This kind of effect was also reported in previous researches 34,35 . The average size of B 4 C grains in this composite were calculated according to the line‐interception method using more than 100 grains, and it is 1.66 μm.…”

Section: Resultssupporting

confidence: 84%

Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

Wang

Deng

Gao

et al. 2020

Int J Applied Ceramic Tech

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B 4 C-TiB 2-SiC composites toughened by (TiB 2-SiC) agglomerates were prepared via reactive hot pressing with B 4 C and TiSi 2 as raw materials. Phase composition, microstructure, and mechanical properties of the fabricated composites were investigated. The function of (TiB 2-SiC) agglomerates was analyzed, and the strengthening and toughening mechanism were also discussed. Results indicated that some of the How to cite this article: Wang S, Deng Y, Gao S, Yang M, Xing P. Microstructure and mechanical property of (TiB 2-SiC) agglomerate-toughened B 4 C-TiB 2-SiC composites.

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Section: Resultssupporting

confidence: 84%

Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

Wang

Deng

Gao

et al. 2020

Int J Applied Ceramic Tech

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“…However, due to the covalent bonding nature of TiB 2 , a sintering temperature as high as 2000°C was still required for the densification of B 4 C‐20 vol% TiB 2 7,11 . The relative density of B 4 C‐TiB 2 showed a decreasing tendency as the content of TiB 2 increased 5,7,12‐13 . As a consequence, the sintering additive was further introduced to improve the densification of B 4 C‐TiB 2 system, including metallic addition, 14‐16 oxides, 17‐18 carbides, 19‐23 borides, 24 etc.…”

Section: Introductionmentioning

confidence: 99%

“…7,11 The relative density of B 4 C-TiB 2 showed a decreasing tendency as the content of TiB 2 increased. 5,7,[12][13] As a consequence, the sintering additive was further introduced to improve the densification of B 4 C-TiB 2 system, including metallic addition, [14][15][16] oxides, [17][18] carbides, [19][20][21][22][23] borides, 24 etc. The addition of Mo and other metals, such as Fe, Co, and Ni, is favorable to form the liquid phase during sintering and thus improve the densification and mechanical properties of TiB 2 -based ceramics.…”

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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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“…The crack propagation path in this area is shown in Fig.5(d). Table 3 shows the mechanical properties of B 4 C-TiB 2 composite ceramics prepared by different starting materials and sintering methods in recent two years [13][14][15][16][17] . Compared with these works, the exural strength (405.11 MPa) of the simple that we sintered by SPS at 1900 ℃ is in the middle to a low level, but the fracture toughness (18.94 MPa•m 1/2 ) is much higher than the fracture toughness shown in the table, which can be described as a leap forward improvement.…”

Section: Resultsmentioning

confidence: 99%

B4C-TiB2 Composite Ceramics with Ultra-High Fracture Toughness Fabricated by Spark Plasma Sintering

Yan¹,

Zhou²,

Wang³

2020

Preprint

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B4C-TiB2 composite ceramics with ultra-high fracture toughness were successfully prepared via spark plasma sintering using B4C and 30 vol.% Ti3SiC2 as raw materials at different sintering temperatures. The results show that compared with pure B4C ceramics sintered by SPS, the flexural strength and fracture toughness are significantly improved, especially the fracture toughness has been improved by leaps and bounds. When the sintering temperature is 1900 ℃, the B4C-TiB2 composite ceramic has the best comprehensive mechanical properties: hardness, bending strength and fracture toughness are 27.28 GPa, 405.11 MPa and 18.94 MPa·m1/2, respectively. The main two reasons for the ultra-high fracture toughness are the formation of TiB2 three-dimensional network covering the whole composites, and the existence of lamellar graphite at the grain boundary.

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Effect of sintering temperature and TiB2 content on the grain size of B4C-TiB2 composites

Cited by 30 publications

References 35 publications

Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

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

B4C-TiB2 Composite Ceramics with Ultra-High Fracture Toughness Fabricated by Spark Plasma Sintering

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Effect of sintering temperature and TiB2 content on the grain size of B4C-TiB2 composites

Cited by 30 publications

References 35 publications

Microstructure and mechanical property of (TiB2‐SiC) agglomerate‐toughened B4C‐TiB2‐SiC composites

Microstructure and mechanical property of (TiB2‐SiC) agglomerate‐toughened B4C‐TiB2‐SiC composites

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

B4C-TiB2 Composite Ceramics with Ultra-High Fracture Toughness Fabricated by Spark Plasma Sintering

Contact Info

Product

Resources

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Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

Microstructure and mechanical property of (TiB₂‐SiC) agglomerate‐toughened B₄C‐TiB₂‐SiC composites

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