Nanostructure of a cubic BN cutting tool material

Angseryd, Jenny; Liu, Fang; Andrén, Hans-Olof

doi:10.1016/j.ijrmhm.2014.07.015

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…Detailed study of microstructure of commercial PcBN materials with TiCN binder demonstrated presence of typical reaction products such as TiB2 and aluminum compounds (AlN, AlB 2 , Al 2 O 3 ) [9], [10], [13], which find good correlation with previous thermodynamic calculations [14]- [16]. While comprehensive study of cBN-based materials with chromium compounds as binder phase established high potential of application of uncommon binder phase materials.…”

Section: Introductionsupporting

confidence: 63%

“…Aluminum oxide has same parameters as in case of samples with VSi 2 . Since presence of tungsten carbide was confirmed by XRD only in sample sintered at 1600 °C it can be presumed that dissolution of WC into W and C occurs [10]. These elements took part in the formation of solid solutions, by replacing chromium atoms in CrSi 2 or / and CrB lattices.…”

Section: Resultsmentioning

confidence: 99%

“…Average sizes of these structure features are in the range of 0.1 to 0.3 μm and this was applicable for all investigated cases. Aluminum melted during manufacturing process precipitates into the intergrain space and interacts with surface oxides [10], [13]. Observed rounded inclusions is likely to correspond to Al 2 O 3 (red arrows on Figure 6).…”

Section: Edxandsemmentioning

confidence: 99%

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Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools With Silicides Compounds as Binder Phase

Slipchenko

Stratiіchuk

Belyavina

et al. 2020

Advances in Transdisciplinary Engineering

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Silicide based compounds are widely used for coatings due to their high melting temperature, oxidation resistance and moderate density. Employment of binders based on silicides of transitional metals can provide cBN-based cutting tools with higher chemical stability and better performance. The relationship between phase composition, microstructure and mechanical properties of novel polycrystalline cubic boron nitride (PcBN) materials were investigated. Three series of PcBN samples were made by high pressure high temperature (HPHT) sintering. Silicides of chromium – CrSi2, vanadium – VSi2 and molybdenum MoSi2 were used as a binder phase in each case, while aluminum was introduced to the mixture as an oxygen getter. During HPHT sintering at temperatures above 1850 ∘C the formation of borides of binder phase were observed in cases with VSi2 and MoSi2. For system with CrSi2 binder, temperature of boride formation was found to be lower – 1600 ∘C. Materials with MoSi2 binder phase demonstrated the highest level of microhardness. Performance of materials were investigated in conditions of machining of stainless steel AISI 316L and Inconel 718.

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Section: Introductionsupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Edxandsemmentioning

confidence: 99%

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Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools With Silicides Compounds as Binder Phase

Slipchenko

Stratiіchuk

Belyavina

et al. 2020

Advances in Transdisciplinary Engineering

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“…The combination of all of these factors excludes many analytical techniques, for instance, X-ray energy dispersive spectroscopy (not sensitive to light elements); secondary ion mass spectrometry and X-ray photoelectron spectroscopy (not enough spatial resolution); and Auger electron spectroscopy (not sufficiently low detection limit). Electron energy loss spectroscopy in a transmission electron microscope can potentially be used (Shigesato et al, 2014; Angseryd et al, 2015), however handling magnetic specimens such as 9–12% Cr steels and at the same time looking for low concentration of B from small areas is far from trivial. Thus, atom probe tomography (APT) is an ideal technique for analyzing B in 9–12% Cr ferritic/martensitic steels, because of its equally high sensitivity to all elements, and high spatial resolution—potentially close to the atomic level (Miller, 2000).…”

Section: Introductionmentioning

confidence: 99%

Analyzing Boron in 9–12% Chromium Steels Using Atom Probe Tomography

Fedorova

Grumsen²,

Hald³

et al. 2019

Microsc Microanal

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Small additions of boron can remarkably improve the long-term creep resistance of 9–12% Cr steels. The improvement has been attributed to boron segregation to grain boundaries during quenching, and subsequent boron incorporation into certain families of precipitates during tempering. However, the detailed mechanisms are not yet fully understood. Atom probe tomography (APT) is an excellent technique for gaining insights into boron distribution, however, in order to acquire accurate analysis of boron in 9–12% Cr steels using APT, there are several key challenges. In order to better understand and address these challenges, we developed a novel method for site-specific APT specimen preparation, which enables convenient preparation of specimens containing specifically selected grain boundaries positioned approximately perpendicular to the axis of the APT tip. Additionally, when analyzing boron at boundaries and in carbides (as diluted solute) and borides, a widening of the profile of boron distribution compared to other elements was repeatedly observed. This phenomenon is particularly analyzed and discussed in light of the evaporation field of different elements. Finally, the possible effects of detector dead-time on quantitative analysis of boron in metal borides are discussed. A simple method using 10B correction was used to obtain good quantification.

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“…Among them, c-BN is known to be the hardest, with a hardness only next to diamond, and has found use in the fields of protective coatings and hard facing applications [7,8]. Importantly, c-BN possesses high oxidation resistance and low chemical reactivity, and it is perhaps best known for cutting ferrous material and carbide-forming hard substances where diamond fails completely [9,10]. However, currently produced c-BN is synthesized from the initial graphitic h-BN precursor with a high temperature and high pressure (HTHP) process and has grain sizes that range from hundreds of nanometers to tens of micrometers [2,4,8,11].…”

Section: Introductionmentioning

confidence: 99%

Observations of nanocrystalline cubic boron nitride formed with plasma spraying

et al. 2016

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a b s t r a c tCubic boron nitride (c-BN) has superior hardness and strength as compared to other ceramics that are commonly used as abrasives and in cutting tool applications. Cubic BN powders are generally produced under high pressures, usually greater than 10 GPa. Here, we report on the synthesis of nanocrystalline c-BN from metastable precursors without high external pressures using a novel plasma spray processing technique. Transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) measurements indicate that the initial metastable precursor particles are amorphous and comprised of boron, carbon, nitrogen and oxygen with weak interatomic bonding that may easily undergo phase transformations during plasma spraying. Postmortem X-ray diffraction and TEM analysis of plasma spray deposits reveal the formation of crystalline phases of BN, and high-resolution TEM observations demonstrate that c-BN can be induced during the plasma spray process with the addition of appropriate catalysts. These observations point to a novel pathway for facilitating the transition from a low-density amorphous state to the high-density cubic BN phase.

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Nanostructure of a cubic BN cutting tool material

Cited by 9 publications

References 16 publications

Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools With Silicides Compounds as Binder Phase

Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools With Silicides Compounds as Binder Phase

Analyzing Boron in 9–12% Chromium Steels Using Atom Probe Tomography

Observations of nanocrystalline cubic boron nitride formed with plasma spraying

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