Results 181 to 190 of about 7,543 (218)

Sintering of Fine Grained Polycrystalline Cubic Boron Nitride Compacts without Binder

Applied Mechanics and Materials, 2014
Cubic boron nitride (cBN) is a excellent super hard materials with superior mechanical properties that has been widely used in different industrial applications. Conventional cBN was sintered with binder in the cBN powder, and the binder affect the mechanical properties of cBN.
Guo Duan Liu, Zi Li Kou, Xiao Zhi Yan, Li Lei, Duan Wei He   +4 more
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Synthesis of polycrystalline cubic boron nitride from hexagonal boron nitride after mechanical activation and modification with aluminum

Inorganic Materials: Applied Research, 2016
The effect of the thermochemical modification of hexagonal BN micropowders with aluminum on the synthesis of cubic-BN-based polycrystals after attritor processing is studied. It is found that the preliminary hBNattr modification with aluminum reduces the parameters of the hBN → cBN phase transformation, namely, p and T, and results in the formation of ...
V. T. Senyut, P. A. Vityaz, S. A. Kovalyova, E. I. Mosunov, I. V. Valkovich, T. V. Gamzeleva   +5 more
openaire   +1 more source

Picosecond laser processing of polycrystalline cubic boron nitride — A method to examine the ablation behavior of a high cubic boron nitride content grade material

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, Ostendorf, Sven, Hallmann, Sina, Emmelmann, Claus   +3 more
openaire   +1 more source

Tool-wear mechanisms in hard turning with polycrystalline cubic boron nitride tools

Wear, 2001
Hard turning is a turning operation performed on high strength alloy steels (45 < HRC < 65) in order to reach surface roughness close to those obtained in grinding (R ∼ 0.1 μm). Extensive research being conducted on hard turning has so far addressed several fundamental questions concerning chip formation mechanisms, tool-wear, surface integrity and ...
G. Poulachon, A. Moisan, I.S. Jawahir
openaire   +1 more source

Thermal Conductivity of Polycrystalline Cubic Boron Nitride Compacts

1979
Slack [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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Mechanism study on the wear of polycrystalline cubic boron nitride cutting tools

SPIE Proceedings, 2010
The 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
openaire   +1 more source

Shock compressibility and spallation strength of cubic modification of polycrystalline boron nitride

High Temperature, 2009
Methods 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, V. V. Yakushev, A. V. Anan’in, V. F. Tatsii, A. N. Zhukov, A. N. Dremin, A. V. Bochko, N. N. Kuzin   +7 more
openaire   +1 more source

Micro-sized polycrystalline cubic boron nitride with properties comparable to nanocrystalline counterparts

Ceramics International, 2020
Abstract High-performance polycrystalline cubic boron nitride (PcBN) was sintered without binders at 1500 °C in a pressure range from 11 to 15 GPa using commercial micrometre cubic boron nitride (cBN) with a diameter of approximately 2–4 μm. The results demonstrated that the sample sintered at 12 GPa and 1500 °C had the best mechanical properties and
Xiaoshuang Yin, Zili Kou, Zhiwei Wang, Teng Liu, Akun Liang, Ming Yang, Shixue Guan, Yuanfen Zhang, Shijiang Chen, Mingli Jiang, Duanwei He   +10 more
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Performance of Turning Steels by Using Polycrystalline Cubic Boron Nitride Cutting Tool

Applied Mechanics and Materials, 2013
PCBN cutting tool is widely used in turning process and known as second best cutting tool after Diamond. This study investigates the suitability of PCBN cutting tool to cut variety types of steel. Experimental results for three major parameters which are cutting speed 150, 175 and 200 m/min, depth of cut 0.1, 0.2 and 0.3 mm, and feed 0.1, 0.2, and 0.3 ...
Mohd Zulhasyree Mohd Zulkifli Cheng, Yusri Yusof   +1 more
openaire   +1 more source

Hard Turning of AISI D2 Steel by Polycrystalline Cubic Boron Nitride (PCBN)

Applied Mechanics and Materials, 2015
The machining of hard turning is performed on hardened steel in the range of 45 to 68 Rockwell hardness using a variety of tool materials such as Polycrystalline cubic boron nitride (PCBN) , Polycrystalline diamond (PCD) and Cubic boron nitride (CBN).
A. Srithar, K. Palanikumar, B. Durgaprasad   +2 more
openaire   +1 more source