Results 141 to 150 of about 737 (179)
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Influence of sintering conditions on the properties of polycrystalline cubic boron nitride
Soviet Powder Metallurgy and Metal Ceramics, 1986For the purpose of a further study of the sintering process of beta-BN grains into polycrystalline compacts, a study was made of the influence of sintering temperature and grain size on the microstructure, width of the x-ray diffraction lines, and certain physical properties of polycrystalline specimens of beta-BN. Sintering of beta-BN grains occurs in
V. B. Shipilo +3 more
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Optimization of machining of automotive components with polycrystalline cubic boron nitride
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2008While superhard cutting tools are being used increasingly in automotive plants worldwide, their adoption within the automotive supply chain is not universal. Important issues relating to successful implementation of superhard cutting tool materials in such applications include the ageing effect of grey iron, proper edge preparation of the cutting tools,
R K Kountanya, P Boppana
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Electrical properties of Be-implanted polycrystalline cubic boron nitride films
Applied Physics Letters, 2008P -type conductivity of polycrystalline cubic boron nitride (cBN) films was achieved by implantation of beryllium ions. The effects of implantation doses and annealing on the phase composition and electrical properties of cBN films were studied. A reduction in resistivity by seven orders of magnitude was observed.
B. He +9 more
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The influence of microstructure on the fracture properties of polycrystalline cubic boron nitride
Computational Materials Science, 2015Abstract The effect of microstructure on the fracture properties of polycrystalline cubic boron nitride (PcBN) for industrial applications has been investigated numerically using the finite volume method. Representative synthetic microstructures have been created using a modified Voronoi tessellation procedure and these have been implemented in a ...
P. Alveen +4 more
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Journal of Laser Applications, 2015
Chipping of hardened steel is often performed by the use of polycrystalline cubic boron nitride (PCBN). Moreover, PCBN tools are also suitable for many machining tasks with a lower degree of specialization, due to their excellent mechanical properties.
Daniel, Christian +3 more
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Chipping of hardened steel is often performed by the use of polycrystalline cubic boron nitride (PCBN). Moreover, PCBN tools are also suitable for many machining tasks with a lower degree of specialization, due to their excellent mechanical properties.
Daniel, Christian +3 more
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Structurization of single-phase polycrystalline materials based on cubic boron nitride
Soviet Powder Metallurgy and Metal Ceramics, 1987The authors study the crystallization of cubic boron nitrides by means of transmission electron microscopy and electron diffraction and the effects on crystal structure and microstructure of sintering, compacting, and heat treatment. Their results establish that the structurization of the nitrides is determined by structural phase transformations ...
V. F. Britun +3 more
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Shock compressibility and spallation strength of cubic modification of polycrystalline boron nitride
High Temperature, 2009Methods of shock-wave physics are used to perform experimental investigations of the elastoplastic and strength properties of cubic modification of polycrystalline boron nitride. The samples are prepared by pressing to a pressure of 7–8 GPa at a temperature of 1700–1800 °C and rank just a little below diamond in hardness. The measurements are performed
A. V. Utkin +7 more
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Mechanism study on the wear of polycrystalline cubic boron nitride cutting tools
SPIE Proceedings, 2010The samples of bearing steel, alloy cold-die steel, cold-harden cast iron were continuous machined by polycrystalline cubic boron nitride(PcBN) cutting tools dry turning. After the machining, the phases of cutting tools blade-edge were analyzed by X-ray diffraction analyzer and cutting tools blade-edge microstructure were observed by scanning ...
Yunhai Jia, Jiangang Li
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Thermal Conductivity of Polycrystalline Cubic Boron Nitride Compacts
1979Slack [1] predicts a room temperature thermal conductivity of about 13 W/cm°C for single-crystal cubic boron nitride with only diamond having a higher conductivity among the high thermal conductivity adamantine Compounds. However, no crystals of cubic BN were available that were large enough to measure the thermal conductivity, and the highest value ...
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