Microstructure and mechanical properties of h-BN–SiC ceramic composites prepared by in situ combustion synthesis

Zheng, Yongting; Li, H.B.; Zhou, Tongming

doi:10.1016/j.msea.2012.01.105

Cited by 29 publications

(13 citation statements)

References 7 publications

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“…BN (h) is a soft material with a low coefficient of friction and also a candidate for dry machining applications [15]. In relation to such properties, the span of application of BN (h) as a solid lubricant has established significant research attention [16,17]. Its high temperature steadiness, small coefficient of friction and inertness in a wide variety of chemical environments have made BN (h) as a perfect alternative to other solid lubricants in many high performance applications.…”

Section: Introductionmentioning

confidence: 99%

Tribological and electrochemical corrosion behavior of Ni–W/BN (hexagonal) nano-composite coatings

Sangeetha

Kalaignan

2015

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Tribological and electrochemical corrosion behavior of Ni–W/BN (hexagonal) nano-composite coatings

Sangeetha

Kalaignan

2015

Ceramics International

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“…Hexagonal boron nitride (h-BN) has a layered structure similar to that of graphite, where B and N atoms are combined by covalent bonds with sp2 hybridization in the same layer, while different layers are combined by van der Waals forces [1][2][3]. Due to its unique crystal structure, the single h-BN crystal shows anisotropy in the physical properties.…”

Section: Introductionmentioning

confidence: 99%

Texture and Anisotropy of Hot-Pressed h-BN Matrix Composite Ceramics With in Situ Formed YAG

Zhang

Duan

Tian

et al. 2021

Preprint

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Textured h-BN matrix composite ceramics were prepared by hot-pressing using different contents of 3Y2O3-5Al2O3 (mole ratio of 3:5) as the liquid phase sintering additive. During the hot-pressing process, the liquid Y3Al5O12 (YAG) phase with good wettability to h-BN grains was in situ formed through the reaction between Y2O3 and Al2O3, and a coherent relationship between h-BN and YAG was observed with [010]h-BN // [1̅11]YAG and (002)h-BN // (321)YAG. Plate-like h-BN grains in the YAG liquid phase environment were rotated under the action of the uniaxial sintering pressure, making their basal surfaces preferentially arranged perpendicular to the sintering pressure, forming textured microstructures with the c-axis of h-BN grains oriented parallel to the sintering pressure, which give these composite ceramics anisotropy in their mechanical and thermal properties. The highest texture degree was found in the specimen with 30 wt.% YAG content, which also possesses the most anisotropic thermal conductivity. The aggregation of YAG phase resulting in the buckling of h-BN plates was observed in the specimen with 40 wt.% YAG content, which significantly reduced its texture degree.

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“…Furthermore, the densification of h -BN/SiC ceramic is difficult, due to their poor sintering ability and the special flake-like structure of h -BN [14,15]. In order to obtain a relative high density, h -BN/SiC ceramic is usually sintered by hot pressing and spark plasma sintering (SPS).…”

Section: Introductionmentioning

confidence: 99%

The Effect of SiC Content on Microstructure and Microwave Heating Rate of h-BN/SiC Ceramics Fabricated by Spark Plasma Sintering

et al. 2019

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Hexagonal boron nitride/silicon carbide (h-BN/SiC) ceramics were fabricated by a spark plasma sintering (SPS) method. Phase and microstructure of ceramics were characterized and observed, respectively, using the X-ray diffraction, scanning electron microscope and electron probe microanalysis. The effect of molar ratios of SiC to h-BN on the microstructure, relative density, hardness, thermal conductivity, and the heating rate by microwaves on the ceramics were investigated. The results showed that the orientation of flake-like h-BN was significantly influenced by SiC content in h-BN/SiC ceramics. With the increasing of SiC content, the h-BN flakes gradually became an isotropic distribution from the preferred orientation aligning in a SPS pressure direction. The relative density of h-BN/SiC ceramics was 97.6 ± 0.9% at a molar ratio of SiC to h-BN of 40/60 mol%. The preferential orientation of h-BN flakes contributed to a relatively high thermal conductivity along the SPS pressure direction, which was beneficial to increasing the heating rate of h-BN/SiC ceramics in microwave fields.

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Microstructure and mechanical properties of h-BN–SiC ceramic composites prepared by in situ combustion synthesis

Cited by 29 publications

References 7 publications

Tribological and electrochemical corrosion behavior of Ni–W/BN (hexagonal) nano-composite coatings

Tribological and electrochemical corrosion behavior of Ni–W/BN (hexagonal) nano-composite coatings

Texture and Anisotropy of Hot-Pressed h-BN Matrix Composite Ceramics With in Situ Formed YAG

The Effect of SiC Content on Microstructure and Microwave Heating Rate of h-BN/SiC Ceramics Fabricated by Spark Plasma Sintering

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