Microstructural characterization of amorphous and nanocrystalline boron nitride prepared by high-energy ball milling

Ghosh, Jiten; Mazumdar, Sujata; Das, Mitun; Ghatak, Sankar; Basu, A K

doi:10.1016/j.materresbull.2007.04.022

Cited by 61 publications

(26 citation statements)

References 22 publications

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“…[1][2][3][4] Therefore, h-BN has been widely applied as insulators for high temperature furnaces, protection tubes and insulating sleeves for thermocouples. [5][6][7] However, the densification of h-BN ceramic is rather difficult due to its strong covalent bonding nature and anisotropic plate-like structure.…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of hexagonal boron nitride ceramic fabricated by pressureless sintering without additive

Wang

Jin

Yang

et al. 2014

Advances in Applied Ceramics

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Hexagonal boron nitride (h-BN) ceramic was successfully fabricated by pressureless sintering at 2100uC using submicrometre h-BN powders without any sintering additive. The as prepared h-BN ceramic showed a room temperature flexural strength of 30?7 MPa. Its flexural strength increased with the increment of temperature in N 2 atmosphere, and it retained a strength of 57?2 MPa (nearly two times of the room temperature strength) at 1600uC due to clean grain boundaries with no glassy phase. Additionally, the as prepared h-BN ceramic showed a high thermal conductivity of 31?76 W m 21 k 21 and a good thermal shock resistance, which retained a relatively high residual flexural strength of 22?6 MPa (73?5% of the original flexural strength) at DT5800uC. The as prepared h-BN ceramic presents a good application prospect at high temperature.

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Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of hexagonal boron nitride ceramic fabricated by pressureless sintering without additive

Wang

Jin

Yang

et al. 2014

Advances in Applied Ceramics

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“…[13][14][15][16][17][18][19]. Hexagonal boron nitride has a layered structure, B and N atoms form hexagons, which extend in two-dimensional layers, forming the planes of the structure.…”

Section: Introductionmentioning

confidence: 99%

Morphology control of hexagonal boron nitride by a silane coupling agent

Lee

et al. 2011

Journal of Crystal Growth

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“…Microstructural parameters such as grain size and lattice strain can be estimated by XRD line profile analysis using different model-based approaches, such as Scherrer analysis, the integral breadth method, and the Williamson-Hall technique. [7] It has been shown that the evolution of texture during the ARB process is different from that in conventionally rolled samples. [8] The textural evolution of ARB-processed samples was investigated in a central region of pure Al, Al alloys, and interstitial-free (IF) steels.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Texture and Grain Size of Nanograined Copper Produced by the Accumulative Roll Bonding Process

Shaarbaf

Toroghinejad

2009

Metall Mater Trans A

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Pure copper was intensely deformed by accumulative roll bonding (ARB) for up to eight cycles at ambient temperature. X-ray diffraction (XRD) was used to evaluate the grain size and texture during the ARB process. The Williamson-Hall method was used to calculate the grain size from the XRD patterns, which was about 30 nm after eight cycles of the ARB process. Texture analysis revealed cube texture in the initial copper. The intensity of cube texture decreased after one cycle of the ARB process. The texture of two-cycle ARB-processed sample was a transition texture, from cube to shear texture (rotated cube) that appeared after two cycles of ARB process in the subsurface regions. This shear texture developed due to shear deformation induced by the high level of friction between the rolls and the sheet. Moreover, shear texture was replaced by recrystallization texture (cube component) by annealing the ARB-processed samples. This result was caused by preferential growth of cube grains.

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Microstructural characterization of amorphous and nanocrystalline boron nitride prepared by high-energy ball milling

Cited by 61 publications

References 22 publications

Physical and mechanical properties of hexagonal boron nitride ceramic fabricated by pressureless sintering without additive

Physical and mechanical properties of hexagonal boron nitride ceramic fabricated by pressureless sintering without additive

Morphology control of hexagonal boron nitride by a silane coupling agent

Evaluation of Texture and Grain Size of Nanograined Copper Produced by the Accumulative Roll Bonding Process

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