Synthesis and properties of hot pressed B4C–TiB2 ceramic composite

Yue, Xin; Zhao, Shumao; Lü, Peng; Chang, Qing; Ru, Hongqiang

doi:10.1016/j.msea.2010.07.101

Cited by 89 publications

(34 citation statements)

References 15 publications

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“…10 However, there are some weak points of boron carbide, too. [12][13][14][15] Almost all applications benefit from higher fracture toughness of the ceramic material. 11 Typical K IC of B 4 C ceramics is between 2 and 3 MPa√m.…”

Section: Introductionmentioning

confidence: 99%

Pressureless sintering and properties of boron carbide composite materials

Martin

Feng

Michaelis

2019

Int J Applied Ceramic Tech

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Boron carbide and Tantalum boride composites were prepared by pressureless sintering of B 4 C with addition of TaC powder. The effect of TaC addition on the sinterability of boron carbide was studied. High densified ceramic with a relative density of 98.7% was obtained at sintering temperature of 2250°C. The composition and the microstructure of the dense composites are characterized by means of x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive x-ray spectroscopy (EDX). The studies show that the composites contain boron carbide, TaB 2 , and carbon phases with a homogeneous structure. In addition, the correlation between the composition and the electrical conductivity was investigated. The electrical conductivity of the composite increased with increasing addition of TaC, and a change in conduction behavior from semiconducting to metallic was observed.High hardness value of 28.49 ± 1.33 GPa was obtained by the sample with 30 wt% TaC addition. K E Y W O R D S boron carbide, electrical conductivity, pressureless sintering, tantalum boride How to cite this article: Martin H-P, Feng B, Michaelis A. Pressureless sintering and properties of boron carbide composite materials. Int J Appl Ceram Technol.

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Section: Introductionmentioning

confidence: 99%

Pressureless sintering and properties of boron carbide composite materials

Martin

Feng

Michaelis

2019

Int J Applied Ceramic Tech

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“…The in-situ reaction of B 4 C with Me oxides (Me = Ti, Zr, Cr, V, Hf, Eu, La, and Y) yielded high dense B 4 C based composites (B 4 C-MeB 2 composites) at a lower sintering temperatures with improved mechanical properties compared to monolithic boron carbide [3,19,22,23]. It is reported that TiO 2 addition to B 4 C has helped to enhance the densification, due to the formation of sub-stoichiometric B 4 C by reactive sintering [19,24]. This sub-stoichiometric compound is believed to enhance the mobility of the constituents, resulting in higher sinterability [19,24].…”

Section: Introductionmentioning

confidence: 99%

“…It is reported that TiO 2 addition to B 4 C has helped to enhance the densification, due to the formation of sub-stoichiometric B 4 C by reactive sintering [19,24]. This sub-stoichiometric compound is believed to enhance the mobility of the constituents, resulting in higher sinterability [19,24]. The reaction between HfO 2 and B 4 C results in the formation of B 4 C-HfB 2 composites with improved thermo-mechanical properties as compared to monolithic B 4 C [19].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Thermo-Physical, Mechanical and Wear Properties of in-Situ Formed Boron Carbide - Zirconium Diboride Composite

Murthy¹

2017

Ceramics - Silikaty

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“…However, to achieve a good balance among different aspects of the mechanical properties of the material, it is still difficult. For instance, hot-pressed B 4 C-TiB 2 composite prepared by Ru showed high strength and toughness of 506 MPa and 9.4 MPa m 1/2 , respectively, but the hardness was just only 23.6 GPa [15]. In comparison, hot-pressed B 4 C-TiB 2 composite prepared by J.Vleugels showed a combination of high strength and high toughness of 867 MPa and 29 GPa, while the fracture toughness was modest (4.5 MPa m 1/2 ) [16].…”

Section: Introductionmentioning

confidence: 99%