Electrical discharge machining of B4C–TiB2 composites

Malek, Olivier; Zhang, Fei; Vanmeensel, Kim; Huang, Shuigen; Jun-hu, Liu; Berghe, S. Van den; Datye, Amit; Wu, Kuang‐Hsi; Lauwers, Bert

doi:10.1016/j.jeurceramsoc.2011.04.024

Cited by 37 publications

(17 citation statements)

References 15 publications

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“…Although B 4 C ceramics have great potential applications, the poor sinterability and relatively low fracture toughness hinder the use of boron carbide. In addition, B 4 C is difficultly machined using the electrical discharge machining (EDM) since it has a high electrical resistance . Consequently, it is important to improve the mechanical properties and machinability.…”

Section: Introductionmentioning

confidence: 99%

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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: Introductionmentioning

confidence: 99%

“…In addition, B 4 C is difficultly machined using the electrical discharge machining (EDM) since it has a high electrical resistance. 8 Consequently, it is important to improve the mechanical properties and machinability.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…Among these composites, B 4 C-TiB 2 ceramic was thought as one of the best potential composites that could retain the essential properties of B 4 C as much as possible. 2,[9][10][11] Firstly, TiB 2 has a higher melting point (2980 • C) than B 4 C, guaranteeing the stability of B 4 C-TiB 2 composite at high temperature. Secondary, B 4 C-TiB 2 composite is hard and light due to the high hardness (25-32 GPa) and moderate density (4.52 g cm −3 ) of TiB 2 .…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Ran

Shen

et al. 2015

Journal of the European Ceramic Society

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“…Further information on the processing can be found elsewhere [5]. , a thermal conductivity of 68.27 W/m.°K [7] and a specific heat of 704.2 J/(kg.°K) according to the rule of mixture using 940 J/(kg. °K) and 617 J/(kg.…”

Section: 1mentioning

confidence: 99%

FRICTION AND WEAR RESPONSE OF TiB2-B4C CERAMICS

Perez¹,

Bonny²,

Baets³

et al. 2013

SCAD

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Rotating sliding wear experiments on TiB2-B4C have been conducted at room temperature (25 °C) in dry conditions according to the ASTMG99-95a standard. SiC balls were used as static counterpart. The disk specimens were surface finished by polishing. The tests were performed using different rotating sliding speeds from 0.1 up to 1.5 m/s with a mean Hertzian contact pressure of 1.2 GPa. Balls and disk specimens were analyzed by 2-D and 3-D surface topography, SEM and optical microscopy. The experimental results demonstrated that the sliding velocity influences both friction coefficient and wear rate values of TiB2-B4C ceramics. It was shown, that the wear rate varied between 3.64E-7 to 8.43E-7 mm3/Nm. Wear mechanisms such as polishing, abrasion and wear debris formation have been identified by means of SEM and EDX technique.

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Electrical discharge machining of B4C–TiB2 composites

Cited by 37 publications

References 15 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

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

FRICTION AND WEAR RESPONSE OF TiB2-B4C CERAMICS

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Electrical discharge machining of B4C–TiB2 composites

Cited by 37 publications

References 15 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

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

FRICTION AND WEAR RESPONSE OF TiB2-B4C CERAMICS

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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