Spark plasma sintering of B4C-TiB2-SiC composite ceramics using B4C, Ti3SiC2 and Si as starting materials

Zhang, Zhao Hui; Cheng, Xingwang; Su, Tie-Jian; Hu, Zheng-Yang; Song, Qi; Wang, Hao

doi:10.1016/j.ceramint.2018.08.245

Cited by 47 publications

(15 citation statements)

References 28 publications

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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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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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“…Yin et al reported such grain refinement and consequent improvement in hardness in which case B 4 C was the matrix material that was reinforced with Ti 3 SiC 2 and Si particles via spark plasma sintering. 18 However, this applies up to a certain weight fraction of the reinforcing agent for the same sintering conditions. In the present case, in which the hard particulates and matrix material have the same weight fraction, a higher sintering pressure was required to achieve the same structural integrity with that of the samples having a lower reinforcement ratio.…”

Section: Microhardness Measurement Resultsmentioning

confidence: 99%

Effect of B4C addition on the microstructure, hardness and dry-sliding-wear performance of AZ91 composites produced with hot pressing

Öge¹,

Öge²,

Yılmaz³

et al. 2019

Mater. Tehnol.

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AZ91-B4C composites were fabricated with varying reinforcement ratios (5 w/%, 10 w/%, 20 w/% and 50 w/% B4C) via powder metallurgy and hot pressing to examine their microstructure, hardness and dry-sliding-wear performance. Powder compositions were verified with XRD and the microstructure of the sintered composites was evaluated using SEM (Scanning Electron Microscope) and EDS analyses. Hardness measurements and dry-sliding-wear tests were performed to evaluate the effect of reinforcement addition on the hardness and wear performance of the fabricated composites. Hot pressing of the composite with 50 w/% B4C required a significantly higher sintering pressure at the same sintering temperature. Increasing the B4C addition resulted in increased hardness values for all the composites, whereas the lowest worn volume and coefficient of friction were obtained with 10 w/% B4C.

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“…Therefore, the B 4 C-TiB 2 composite ceramics are densified well. and reached a maximum with 20 wt% TiH 2 [27] . Due to the decomposition of TiH 2 powder at 620 °C via the process shown in Equation 1, the temperature was maintained at 800 °C for 10 minutes to ensure the complete formation of Ti.…”

Section: Density and Phase Compositionsmentioning

confidence: 97%

Properties of B₄C-TiB₂ ceramics prepared by spark plasma sintering*

et al. 2021

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By doping titanium hydride (TiH2) into boron carbide (B4C), a series of B4C + x wt% TiH2 (x = 0, 5, 10, 15, and 20) composite ceramics were obtained through spark plasma sintering (SPS). The effects of the sintering temperature and the amount of TiH2 additive on the microstructure, mechanical and electrical properties of the sintered B4C-TiB2 composite ceramics were investigated. Powder mixtures of B4C with 0–20 wt% TiH2 were heated from 1400 °C to 1800 °C for 20 min under 50 MPa. The results indicated that higher sintering temperatures contributed to greater ceramic density. With increasing TiH2 content, titanium diboride (TiB2) formed between the TiH2 and B4C matrix. This effectively improved Young’s modulus and fracture toughness of the composite ceramics, significantly improving their electrical properties: the electrical conductivity reached 114.9 S⋅cm−1 at 1800 °C when x = 20. Optimum mechanical properties were obtained for the B4C ceramics sintered with 20 wt% TiH2, which had a relative density of 99.9 ± 0.1%, Vickers hardness of 31.8 GPa, and fracture toughness of 8.5 MPa⋅m1 / 2. The results indicated that the doping of fine Ti particles into the B4C matrix increased the conductivity and the fracture toughness of B4C.

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Spark plasma sintering of B4C-TiB2-SiC composite ceramics using B4C, Ti3SiC2 and Si as starting materials

Cited by 47 publications

References 28 publications

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

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

Effect of B4C addition on the microstructure, hardness and dry-sliding-wear performance of AZ91 composites produced with hot pressing

Properties of B₄C-TiB₂ ceramics prepared by spark plasma sintering*

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Spark plasma sintering of B4C-TiB2-SiC composite ceramics using B4C, Ti3SiC2 and Si as starting materials

Cited by 47 publications

References 28 publications

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

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

Effect of B4C addition on the microstructure, hardness and dry-sliding-wear performance of AZ91 composites produced with hot pressing

Properties of B4C-TiB2 ceramics prepared by spark plasma sintering*

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Properties of B₄C-TiB₂ ceramics prepared by spark plasma sintering*