Effect of tungsten carbide nanoparticles on mechanical properties and sinterability of B4C-WC nanocomposites using pressureless sintering method

Rahimi, Amirhossein; Baharvandi, Hamid Reza

doi:10.1016/j.ijrmhm.2016.10.024

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…It is widely used in the fields of grinding processing [5], catalytic carriers [6], and antioxidants of refractory materials [7]. However, the sintering of pure B4C powder is very difficult because of the high content of covalent bonds of B4C, which reduces the performance of the material [8].…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Yang

Deng

et al. 2022

Advances in Transdisciplinary Engineering

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B4C, Si, Al, and γ-Al2O3 were used as raw materials, formed β-Sialon and SiC in situ by solid-state reaction for preparation of B4C composite powder. β-Sialon and SiC grains are uniformly and dispersedly distributed in the composite powder. The effects of the molar ratio of raw materials, nitridation temperature and soaking time for the phase composition, and microstructure of the composite powder were studied. When the molar ratio of B4C and Si is 2: 3, the composite powder with columnar β-Sialon grains growing alternately can be prepared after nitridation at 1500°C for 4 h. The liquid phase formed by the melting of Si at high temperature promoted the dissolution of B4C and the formation of SiC. When the nitridation temperature was increased or the soaking time was prolonged, the gas phase volatilization of Si and Al was intensified, SiC and AlN whiskers tend to be formed in the composite powder.

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Section: Introductionmentioning

confidence: 99%

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Yang

Deng

et al. 2022

Advances in Transdisciplinary Engineering

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“… To prepare B 4 C‐based composite materials is instead an applicable way to circumvent this problem by means of conventional densification techniques. Meanwhile, liquid silicon infiltration (LSI) process is of particular interest especially for net dimensional fabrication of reaction‐bonded boron carbide (RBBC) composites at low temperatures …”

Section: Introductionmentioning

confidence: 99%

Gel‐casting process‐derived 3D‐interconnected porous carbon/B₄C preform for reaction‐bonded boron carbide composites

Long

et al. 2017

Int J Applied Ceramic Tech

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A novel kind of 3D interconnected porous carbon-bonded B 4 C preform with flexural strength of about 20MPa is fabricated by gel-casting method. As the control, the B 4 C/C preforms via molding-produced method are fabricated. The B 4 C/C preforms own the same carbon content and almost the same porosity with different molding method. Compared with the conventional compression molding-produced B 4 C/C preform, the 3D-interconnected porous carbon-bonded boron carbide preforms afford three-fold advantages in the fabrication of reaction-bonded boron carbide (RBBC) composite via the liquid silicon infiltration (LSI) process, including induced formation of continuous SiC-bonded boron carbide skeleton structure, a reduction in the size of residual silicon, and prevented the coarsening of ceramic grains as well. As a result, the RBBC composite fabricated by gel-casting appears as a more refined structure resulting in enhanced mechanical properties: the Vickers hardness, flexural strength, and fracture toughness of I-GC composites fabricated from 3D-interconnected porous carbon/B 4 C preforms are 19.4 AE 1.3 GPa, 389 AE 17 MPa, and 4.37 AE 0.1 MPaÁm 1/2 , respectively, which are statistically higher than those of RBBC fabricated by the conventional compression moldingproduced B 4 C/C preform. K E Y W O R D Sboron carbide, gel-casting, infiltration, mechanical properties, refined structure

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Tungsten Carbides

Shabalin

2022

Ultra-High Temperature Materials IV

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Effect of tungsten carbide nanoparticles on mechanical properties and sinterability of B4C-WC nanocomposites using pressureless sintering method

Cited by 7 publications

References 11 publications

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Gel‐casting process‐derived 3D‐interconnected porous carbon/B₄C preform for reaction‐bonded boron carbide composites

Tungsten Carbides

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Effect of tungsten carbide nanoparticles on mechanical properties and sinterability of B4C-WC nanocomposites using pressureless sintering method

Cited by 7 publications

References 11 publications

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

Gel‐casting process‐derived 3D‐interconnected porous carbon/B4C preform for reaction‐bonded boron carbide composites

Tungsten Carbides

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Product

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Gel‐casting process‐derived 3D‐interconnected porous carbon/B₄C preform for reaction‐bonded boron carbide composites