Fast synthesis of B4C–TiB2 composite powders by pulsed electric current heating TiC–B mixture

Wang, Dewen; Ran, Songlin; Shen, Lu; Sun, Huifeng; Huang, Qing

doi:10.1016/j.jeurceramsoc.2014.10.018

Cited by 32 publications

(22 citation statements)

References 20 publications

(30 reference statements)

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“…In our previous study, B 4 C and TiB 2 were simultaneously generated using TiC nanopowders and amorphous B powders. The relative density of compact was only 96% under a pressure of 60 MPa at 1900°C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

et al. 2018

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High electrical resistance and low fracture toughness of B4C ceramics are 2 of the primary challenges for further machining of B4C ceramics. This report illustrates that these 2 challenges can be overcome simultaneously using core‐shell B4C‐TiB2&TiC powder composites, which were prepared by molten‐salt method using B4C (10 ± 0.6 μm) and Ti powders as raw materials without co‐ball milling. Finally, the near completely dense (98%) B4C‐TiB2 interlayer ceramic composites were successfully fabricated by subsequent pulsed electric current sintering (PECS). The uniform conductive coating on the surface of B4C particles improved the mass transport by electro‐migration in PECS and thus enhanced the sinterability of the composites at a comparatively low temperature of 1700°C. The mechanical, electrical and thermal properties of the ceramic composites were investigated. The interconnected conductive TiB2 phase at the grain boundary of B4C significantly improved the properties of B4C‐TiB2 ceramic composites: in the case of B4C‐29.8 vol% TiB2 composite, the fracture toughness of 4.38 MPa·m1/2, the electrical conductivity of 4.06 × 105 S/m, and a high thermal conductivity of 33 W/mK were achieved.

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Section: Resultsmentioning

confidence: 99%

Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

et al. 2018

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“…Due to its prevailing covalent bonding the boron carbide based ceramic materials are extremely hard. The high hardness, above 30 GPa, places it on the third place between hardest materials after diamond and cubic boron nitride [4][5][6]. B4C is corrosion and wear resistant and ambient and elevated temperatures [7][8].…”

Section: Introductionmentioning

confidence: 99%

“…B4C is corrosion and wear resistant and ambient and elevated temperatures [7][8]. Boron carbide is characterized by high melting temperature of 2450 °C, it has low density of 2.52 g.cm -3 , high Young's modulus of 460 GPa and high cross-section for absorption of neutrons [4,[10][11][12]. Difficult sinterability of B4C is one of the main problems of reliable compacts preparations.…”

Section: Introductionmentioning

confidence: 99%

Boron Carbide Based Ceramic Composites Hot Pressed With Aluminium Additive

Švec¹,

Gábrišová²,

Brusilová³

et al. 2020

Acta Metall Slovaca

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Ceramic composite materials consisting of B4C matrix and Al8B4C7 secondary phase were prepared by in situ reactive sintering of the initial powder mixture B4C-Al with concentration from 5 to 25 wt.% Al sintering additives. The composite samples were hot pressed at the temperature of 1850 °C, pressure of 35 MPa, for 15 min in a vacuum atmosphere. The portion of Al8B4C7 secondary phase increased from 3.3 to 22.1 wt.% when increasing the concentration of Al sintering additive from 5 to 25 wt.% Al. Significant improving of densification and mechanical properties was measured at increasing of Al sintering additive concentration from 5 to 10 wt.% Al. The highest average hardness of 28.74 GPa was achieved when adding 15 wt.% Al sintering additive. The fracture toughness increased with concentration of Al sintering additive in whole concentration range with the highest average value of 5.92 MPa.m1/2 at 25 wt.% Al sintering additives.

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“…Boron carbide (B 4 C) has many excellent physical properties, such as extremely high hardness, high wear resistance, low specific gravity, and high chemical stability. Up to now, it has been widely used in wear resistant components, lightweight armor products, and neutron radiation shields, etc . However, the intrinsic brittleness and relatively bad sinterability owing to the rigid covalent bonds and low ion diffusion mobility of B 4 C have restricted its widespread application as a structural material .…”

Section: Introductionmentioning

confidence: 99%

Effect of TiB₂ on dynamic response of TiB₂‐B₄C composites under shock wave loading

Gao

Yi²,

Zhang

et al. 2018

Int J Applied Ceramic Tech

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A series of plate impact tests were conducted to evaluate the effect of TiB2 on the mechanical performance of the TiB2‐B4C composites under ultra‐high strain rates. The free surface velocity of sample was monitored by the dual‐laser Doppler pin system. The dynamic response and Hugoniot equation of state of the TiB2‐B4C composites were obtained in shock and impact environments. Experimental results showed that the Hugoniot elastic limit (HEL) of the composites was increased from 14.98 to 16.91 GPa with increasing of loading strain rates. The strain‐rate sensitivity of the TiB2‐B4C composites, as well as the pure TiB2, was positive. The HEL of the composites was close to that of the matrix material (B4C), and was little effected by the additional agent (TiB2 phase) at the strain rates higher than 104 s−1. Compared with previous data, a strong relation was showed between the HEL and the wave impedance of the composites under shock wave loading.

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Fast synthesis of B4C–TiB2 composite powders by pulsed electric current heating TiC–B mixture

Cited by 32 publications

References 20 publications

Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

Boron Carbide Based Ceramic Composites Hot Pressed With Aluminium Additive

Effect of TiB₂ on dynamic response of TiB₂‐B₄C composites under shock wave loading

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Fast synthesis of B4C–TiB2 composite powders by pulsed electric current heating TiC–B mixture

Cited by 32 publications

References 20 publications

Synthesis and properties of conductive B4C ceramic composites with TiB2 grain network

Synthesis and properties of conductive B4C ceramic composites with TiB2 grain network

Boron Carbide Based Ceramic Composites Hot Pressed With Aluminium Additive

Effect of TiB2 on dynamic response of TiB2‐B4C composites under shock wave loading

Contact Info

Product

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Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

Synthesis and properties of conductive B₄C ceramic composites with TiB₂ grain network

Effect of TiB₂ on dynamic response of TiB₂‐B₄C composites under shock wave loading