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Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride [PDF]

Scripta Materialia, 2012
The Vickers hardness of polycrystalline γ-B was measured using a diamond indentation method. The elastic properties of polycrystalline γ-B (B=213.9 GPa, G=227.2 GPa, and E=503.3 GPa) were determined using ultrasonic measurement at ambient condition. Under the loading force up to 20 N, our test gave an average Vickers hardness in the asymptotic-hardness
Tetsuo Irifune, Jiaqian Qin, Duanwei He   +2 more
exaly   +3 more sources

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Superhard transparent polycrystalline cubic boron nitride

Applied Physics Letters, 2021
Polycrystalline cubic boron nitride (PcBN) has been synthesized at 14 GPa and high temperatures of 1300–2000 °C in a two-stage multi-anvil cell. Sintered PcBN synthesized at 1700–1800 °C and 14 GPa with a grain size of ∼200 nm is optically transparent with a transmittance of ∼70% at wavelengths of 400–1500 nm and has the Vickers hardness of ∼63–69 GPa.
Mengxi Zhao, Zili Kou, Youjun Zhang, Bo Peng, Yipeng Wang, Zhiwei Wang, Xiaoshuang Yin, Mingli Jiang, Shixue Guan, Jiawei Zhang, Duanwei He   +10 more
openaire   +1 more source

Thermal effects on tribological behaviors of polycrystalline cubic boron nitride

Ceramics International, 2021
Abstract In order to understand the thermal damage mechanisms of polycrystalline cubic boron nitride (PcBN) under elevated temperature and the following influences on its tribological behaviors, the physicochemical characteristic of annealed PcBN under various temperatures was investigated by X-ray diffraction, Scanning electron microscopy and energy
Dezhong Meng, Wenbo Qin, Wen Yue
exaly   +2 more sources

Simulation of friction between diamond and polycrystalline cubic boron nitride

Procedia CIRP, 2021
Published by Elsevier, Amsterdam [u.a.]
Müller, Ulrich Hermann, Prinz, Sebastian, Barth, Sebastian, Bergs, Thomas   +3 more
exaly   +3 more sources

Raman and photoluminescence spectra of indented cubic boron nitride and polycrystalline cubic boron nitride

Diamond and Related Materials, 2000
Abstract The use of Raman spectroscopy, and in particular Raman line shifts, to measure stress in diamond and nitrides such as gallium nitride (GaN), is well known. In both diamond and GaN the application is principally to study stresses in thin films and at the substrate–thin film interface.
R.M. Erasmus, J.D. Comins, M.L. Fish
openaire   +1 more source

Properties and Performance of Polycrystalline Cubic Boron Nitride

International Journal of Applied Ceramic Technology, 2015
Cubic boron nitride ( CBN ) is a lightweight (ρ = 3.45 g/cm 3 ) ceramic material that is harder than all materials except diamond. As harder ceramics tend to perform better as armor, this material is of interest to the military community.
Jeffrey J. Swab, Lionel Vargas‐Gonzalez, Elizabeth Wilson, Eric Warner   +3 more
openaire   +1 more source

Diamond deposition on polycrystalline films of cubic boron nitride

Applied Physics Letters, 1993
We have grown diamond films on films of cubic boron nitride (cBN). The cBN films were grown on Si(100) substrates using ion-assisted pulsed laser deposition. Fourier transform infrared (FTIR) spectroscopy indicated that the BN films contained ∼75% sp3-bonded cBN.
T. A. Friedmann, L. J. Bernardez, K. F. McCarty, E. J. Klaus, D. K. Ottesen, H. A. Johnsen, W. M. Clift   +6 more
openaire   +1 more source

Development of matrix microstructure in polycrystalline cubic boron nitride ceramics

Journal of the European Ceramic Society, 2017
Abstract The development of matrix microstructure in polycrystalline cubic boron nitride cutting tool materials has been investigated by X-ray diffraction and scanning and transmission electron microscopy combined with energy dispersive X-ray spectrometry.
K.E. Lindgren, A. Kauppi, L.K.L. Falk
openaire   +1 more source

Grinding damage in the fabrication of polycrystalline cubic boron nitride micro-drill

Journal of Manufacturing Processes, 2023
Zhiqiang Liang, Yuchao Du, Zhipeng Su
exaly   +2 more sources

Synthesis and characterization of polycrystalline sintered compacts of cubic boron nitride

Journal of Materials Science, 1986
Synthetic cubic boron nitride (CBN) compacts are an important tool material used extensively for the machining of hardened steels. The paper describes work on the synthesis and characterization of CBN compacts. A 200 tonne cubic press has been used for the generation of high pressures.
B. K. Agarwala, B. P. Singh, S. K. Singhal   +2 more
openaire   +1 more source