Structure of composites of the cBN-Al-ZrN system produced by high-pressure sintering

Bezhenar, M. P.; Oleinik, G. S.; Bozhko, Serhiy; Garbuz, T. O.; Konoval, S. M.

doi:10.3103/s106345760906001x

Cited by 13 publications

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“…Properties of composite materials of cBN-{TiN, ZrN, VN, NbN}-Al systems were studied in Refs. [5][6][7][8][9][10]. As a result of XRD studies it was shown that under high pressure (up to 7.7 GPa) and temperatures higher than 2000 °C the solid state interaction of cBN and TiN or ZrN leads to the formation of TiB2 or ZrB2 diborides, which improve the mechanical properties of cBN-{TiN, ZrN}-Al composites [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Formation of Nitrogen Supersaturated (Nitrogen-Rich) MeN Nitrides at Thermobaric Sintering of PcBN Composites of cBN-{TiN, ZrN, HfN, VN, NbN}–Al Systems

Bilyavina,

Turkevich,

Kuryliuk

et al. 2024

J. Nano- Electron. Phys.

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°C), was studied in detail using the X-ray diffraction structural analysis method. It was shown that the crystal structure of each MeN nitride belonges to the modified NaCl type structure with an additional position partially filled by the nitrogen atoms. The presence of such a position leads to a certain excess of nitrogen on the sample's surface, the source of which is nitrides from the depth of the composite. It is shown that the diffusion of nitrogen atoms through defects and lattice sites of MeN crystal lattices from the bulk to the surface of composite plays an important role in the formation of crystal structures of MeN nitrides at the barothermal conditions. Using the results of X-ray diffraction structural calculations as reference values, the main parameters of this diffusion process (activation energy and rate constant) were determined for cBN-{TiN, HfN, VN, NbN}-Al composites. It is shown that the activation energy of diffusion increases in HfN → TiN → VN → NbN series and correlates with the formation enthalpy of each MeN nitrides.

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Section: Introductionmentioning

confidence: 99%

Formation of Nitrogen Supersaturated (Nitrogen-Rich) MeN Nitrides at Thermobaric Sintering of PcBN Composites of cBN-{TiN, ZrN, HfN, VN, NbN}–Al Systems

Bilyavina,

Turkevich,

Kuryliuk

et al. 2024

J. Nano- Electron. Phys.

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“…Comparative study of tool life of different grades of cBN-based materials in conditions of high speed machining of Inconel 718 established superior tool life of materials with low cBN content and ceramic binders [6]. Since that, several studies were performed in order to investigate and improve properties of these materials [7]- [12].…”

Section: Introductionmentioning

confidence: 99%

“…Average microhardness of these materials were in a range of 35 -40 GPa [17], [18]. Although, investigation of cBNbased materials with vanadium, zirconium compounds as a binders pointed out the importance of chemical stability of binder phase along with high hardness of the tool [12], [19]- [22].…”

Section: Introductionmentioning

confidence: 99%

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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Influence of cBN content, Al2O3 and Si3N4 additives and their morphology on microstructure, properties, and wear of PCBN with NbN binder

Rumiantseva

Melnichuk

Garashchenko

et al. 2020

Ceramics International

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Structure of composites of the cBN-Al-ZrN system produced by high-pressure sintering

Cited by 13 publications

References 0 publications

Formation of Nitrogen Supersaturated (Nitrogen-Rich) MeN Nitrides at Thermobaric Sintering of PcBN Composites of cBN-{TiN, ZrN, HfN, VN, NbN}–Al Systems

Formation of Nitrogen Supersaturated (Nitrogen-Rich) MeN Nitrides at Thermobaric Sintering of PcBN Composites of cBN-{TiN, ZrN, HfN, VN, NbN}–Al Systems

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

Influence of cBN content, Al2O3 and Si3N4 additives and their morphology on microstructure, properties, and wear of PCBN with NbN binder

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