Results 151 to 160 of about 737 (179)
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Some properties and cutting performance of polycrystalline cubic boron nitride with no additives
International Journal of Refractory Metals and Hard Materials, 1998Abstract Hexagonal BN disks made by chemical vapor deposition were treated under ultra high pressure of 6.8 GPa and at temperatures from 1800 to 2500 °C for 1.8 ks. When treated at temperatures above 2100 °C, only a c-BN phase was detected. The sample treated at 2100 °C had a homogeneous microstructure having fine grain size less than 1 μm, whereas ...
T. Ohashi +3 more
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Processing and properties of polycrystalline cubic boron nitride reinforced by SiC whiskers
International Journal of Applied Ceramic Technology, 2018Abstract Dense polycrystalline cBN (Pc BN )–SiCw composites were fabricated by a two‐step method: First, SiO 2 was coated on the surface of cubic boron nitride ( cBN ) particles by the sol‐gel ...
Jian Li +5 more
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A Review of Polycrystalline Cubic Boron Nitride Cutting tool Developments and Application
1993This paper reviews published literature on the manufacture and application of polycrystalline cubic boron nitride (PCBN) cutting tools. More specifically, it details the various commercial CBN products, their composition/microstructure and physical properties, together with workpiece/material applications and associated machinability data. In addition,
A. M. Abrão +2 more
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Effect of grain boundaries on iron distribution in polycrystalline cubic boron nitride
Journal of Physics: Condensed Matter, 2002The influence of grain boundaries on local electronic states and the distribution of 57Fe ions in cubic boron nitride (c-BN) polycrystals has been investigated as a function of technological processing. The study was performed on two sets of c-BN samples: (1) prepared by catalytic synthesis and (2) synthesized by direct phase transformation.
J A Fedotova +3 more
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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 +5 more
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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 +5 more
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Tool-wear mechanisms in hard turning with polycrystalline cubic boron nitride tools
Wear, 2001Hard 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
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Performance of Turning Steels by Using Polycrystalline Cubic Boron Nitride Cutting Tool
Applied Mechanics and Materials, 2013PCBN 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 +1 more
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Polycrystalline Diamond and Cubic Boron Nitride
1994Ernest Ratterman, Harold P. Bovenkerk
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2021
In this work the influence of microstructure on the contact damage of polycrystalline cubic boron nitride (Pc-BN) is studied. Pc-BN is a superhard composite material constituted by c-BN particles and a binder matrix of either metallic or ceramic nature.
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In this work the influence of microstructure on the contact damage of polycrystalline cubic boron nitride (Pc-BN) is studied. Pc-BN is a superhard composite material constituted by c-BN particles and a binder matrix of either metallic or ceramic nature.
openaire +1 more source