Composite Material Based on Cubic Boron Nitride Micropowder with a Coating

Богданов, С. П.; Garshin, A. P.; Пономаренко, В. А.

doi:10.1007/s11148-016-9899-4

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…here S ij denote the softening coefficient in elastic compliance matrix by inversing the elastic stiffness matrix C. The calculated lattice constants and elastic parameters, and other reference data for comparison are listed in Table 1. [3,18,19,21] It is clear that, as shown in Figure 4, all elastic constants C ij and elastic modulus increase with pressure, as well as the compressive strains. The increase of elastic constants possesses different slopes, C 11 and C 33 are the largest, C 66 , C 12 , C 14 , C 44 follow, and C 13 is the minimum.…”

Section: Resultsmentioning

confidence: 95%

“…The calculated lattice constants and elastic parameters, and other reference data for comparison are listed in Table . It is clear that, as shown in Figure , all elastic constants C ij and elastic modulus increase with pressure, as well as the compressive strains.…”

Section: Resultsmentioning

confidence: 99%

“…h ‐BN has a multi‐layer structure similar to graphite, it can be used as chemical protective and refractory coating for material surfaces . Besides, some new research hot spots, such as boron nitride doped with transition elements and low‐dimensional BN material, have also been applied in many aspects …”

Section: Introductionmentioning

confidence: 99%

“…[18] Besides, some new research hot spots, such as boron nitride doped with transition elements and low-dimensional BN material, have also been applied in many aspects. [19,20] Recently, Mei et al [21] found a new boron nitride polymorph with 6 atoms in each unit cell, belongs to a trigonal system and is labeled as trigonal boron nitride (T-BN). To our knowledge, there is no report about trigonal system in BN polymorphs before.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Hydrostatic Pressure and Biaxial Strains on the Elastic, Electronic and Lattice Vibrational Properties of Trigonal Boron Nitride

Shi

Zhu

et al. 2019

Physica Status Solidi (b)

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The effects of hydrostatic pressure and biaxial strains on the elastic, electronic, and lattice vibrational properties of a new superhard material trigonal boron nitride (T‐BN) are studied by first‐principles calculation. The mechanical and dynamical stabilities of T‐BN are confirmed by elastic constants criteria and phonon dispersion curves. It is found that all elastic constants and elastic modulus increase (decrease) under pressure and compressive (tensile) strain ϵxx. The Vicker's hardness of every single chemical bond as well as the crystal is calculated by a microscopic model. The hardness of T‐BN 55.5 GPa is smaller than that in c‐BN (64 GPa) but increases significantly with increasing pressure and compressive ϵxx. The anisotropic index and anisotropic velocities, as well as the Debye temperature for T‐BN are also discussed. Moreover, the computational infrared absorption spectra exhibit significant blueshift under pressure and −5%<ϵxx<3%, while redshift of A3 and E4 modes can be observed when ϵxx>3%. Electronic calculation shows the T‐BN is an indirect band‐gap semiconductor, and energy gap decreases monotonically under computational conditions. Analysis based on density of states is conducted, clarifying the causes of bonding and bandgap changes in T‐BN.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Hydrostatic Pressure and Biaxial Strains on the Elastic, Electronic and Lattice Vibrational Properties of Trigonal Boron Nitride

Shi

Zhu

et al. 2019

Physica Status Solidi (b)

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“…During gas transport of titanium, changing temperature of sintering and atmosphere composition one may obtain coatings of various content: from metallic titanium to products of its interaction. Thus, from nano-sized and micro powders of SiC a series of composites such as SiC/Ti, SiC/(TiC+TiSi 2 ), SiC/TiN [11], from boron nitride -BN/Ti, BN/TiN, BN/(TiB+TiN+TiB 2 ) were obtained [12]. Therefore, we may adjust the content of various phases in coating composition.…”

Section: Solid State Phenomena Vol 265mentioning

confidence: 99%

Refractory Core-Shell Powders for Additive Industries

Богданов¹,

Garshin

2017

SSP

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The finished products obtained when the surfaces of powders of refractory materials (diamond, boron nitride, silicon carbide, tungsten carbide, tungsten) were coated with thin films by the method of iodide transport are presented. The developed method enables to obtain powder composite materials of core-shell type that have surface thickness varying in the range from 1 nm to several micrometers. From the powders modified by the films of metals and thier compounds composite materials were developed, their physical and mechanical characteristics were studied. The characteristics turned out to be substantially higher in comparison to materials sintered from the same powders but without coating. The probable fields of use of the composites in question were determined.

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