Pressureless sintering of boron carbide

Roy, Tufan; Subramanian, C.; Suri, A.K.

doi:10.1016/j.ceramint.2005.02.008

Cited by 165 publications

(92 citation statements)

References 9 publications

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“…The B 10 isotope of B 4 C undergoes the following nuclear reaction without forming long-lived nuclides and g radiation emission during 10 B(n,) 7 Li neutron capture reaction. [11][12][13].…”

Section: Introductionmentioning

confidence: 98%

Studies on the effect of processing parameters on electroless coating of copper on boron carbide particles

Deepa

Resmi

Rajan

et al. 2011

Trans Indian Inst Met

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Boron carbide a hard refractory semiconductor ceramic material due to its unique structural properties and high neutron cross section finds application as structural materials and neutron shielding material. Its applicability is reduced due to low sinterbility and dispersiblity which can be overcome by copper coating. The effect of Electroless coating parameters on the surface deposits is characterised. The studies revealed that uniform and smooth coating was observed for pH11 at bath temperature of 348K. The prolonged suspension of B 4 C particles on the reaction bath has little effect on coating but it inturns reduces the adhesion of coating on activated particles.

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Section: Introductionmentioning

confidence: 98%

Studies on the effect of processing parameters on electroless coating of copper on boron carbide particles

Deepa

Resmi

Rajan

et al. 2011

Trans Indian Inst Met

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“…The efficacy of various additives for densification of boron carbide has already been studied, such as some transition elements, transition-metal oxides or nonoxide materials such as Al, Fe, TiO 2 , SiC, and TiC. [9][10][11] In consideration of such previous work on ''B 4 C,'' we decided to work with similar additives such as Si, SiC, Al, and TiC, to determine their effect on the densification process and thermoelectric properties of YB 22 C 2 N. In addition, in this work we evaluate the effect of atmosphere during sintering. Nitrogen and argon atmospheres have been used as sintering media.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Thermoelectric Properties of Dense YB22C2N Samples Fabricated Through Spark Plasma Sintering

Berthebaud

Nishimura

Mori

2011

Journal of Elec Materi

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Dense samples of the higher boride YB 22 C 2 N have been fabricated through the spark plasma sintering (SPS) method with different sintering aids. YB 22 C 2 N is a representative of a series of newly discovered rare-earth borocarbonitrides, which may be the long-awaited n-type counterpart of boron carbide, ''B 4 C.'' The effect of Si, SiC, Al, and TiC additions on the sintering process of YB 22 C 2 N has been studied. The best sintered bodies with densities higher than 90% of theoretical density were obtained by means of SPS at 1700°C. We show that the additive choice and pressure have an effect on grain size and density. An investigation of the effect of atmosphere on the sintering behavior has also been carried out. It was found that sinterability is enhanced under nitrogen atmosphere. Thermoelectric properties of the materials sintered with additives have been evaluated, and we discuss their dependences on the fabrication process route.

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“…5,6 Hot pressing is therefore an essential technique for obtaining dense boron carbide ceramics. Many literatures have reported that the effects of B 4 C powder particle size 7 and hot-pressing parameters [8][9][10][11] on the microstructure and properties of hot-pressed boron carbide. Unfortunately, scarce publications had been covered as yet on the hot-pressing kinetics and densification mechanisms of boron carbide.…”

Section: Introductionmentioning

confidence: 99%

Hot‐Pressing Kinetics and Densification Mechanisms of Boron Carbide

Zhang

Wang

et al. 2015

J. Am. Ceram. Soc.

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The hot-pressing kinetics of boron carbide at different stages in the hot-pressing process was investigated. Based general densification equation and pore-dragged creep model, the densification and grain growth kinetics were analyzed as a function of various parameters such as sintering temperature, sintering pressure and dwell time. Stress exponent of n % 3 at the initial dwell stage suggests the plastic deformation may dominates the densification. The further TEM observations and the calculation based on effective stress and plastic yield stress also indicate that plastic deformation may occur and account for the large increase in density at the initial stage of sintering. Calculated grain size exponent of m % 3 suggests that the grain-boundary diffusion dominates the densification at the final stage. During the final stage of sintering, grain growth may be determined by evaporation/condensation and grain-boundary migration.

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Pressureless sintering of boron carbide

Cited by 165 publications

References 9 publications

Studies on the effect of processing parameters on electroless coating of copper on boron carbide particles

Studies on the effect of processing parameters on electroless coating of copper on boron carbide particles

Microstructure and Thermoelectric Properties of Dense YB22C2N Samples Fabricated Through Spark Plasma Sintering

Hot‐Pressing Kinetics and Densification Mechanisms of Boron Carbide

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