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Development of CNT-Coated Diamond Grains Using Self-Assembly Techniques for Improving Electroplated Diamond Tools

Journal Key Engineering Materials (Volumes 389 - 390)
Volume Advances in Abrasive Technology XI
Edited by Tsunemoto Kuriyagawa, Libo Zhou, Jiwang Yan and Nobuhito Yoshihara
Pages 72-76
DOI 10.4028/www.scientific.net/KEM.389-390.72
Online since September, 2008
Authors Tsunehisa Suzuki, Toshiaki Mitsui, Tomoki Fujino, Mutsuto Kato, Yasufumi Satake, Hiroshi Saito, Seiya Kobayashi
Keywords Carbon Nanotube (CNT), Electroplated Diamond Tool, Grain Retentivity, Self-Assembly
Abstract Single crystalline diamond grains covered by nested carbon nanotubes (CNTs) were constructed using self-assembly techniques. The acid-treated CNTs (MWCNTs-COOH) are first adsorbed onto amine-terminated diamond grains, which were chemically functionalized by silane coupling treatments, in N, N-dimethylformamide solution. Then, the drying and readsorption cycle deposited CNT coatings on the diamond grains due to CNT-CNT interactions caused by van der Waals forces. When the diamond grains were bonded to steel substrates by electroplating using nickel sulfamate plating bath, the bonding strength of the CNT-coated diamond grains to the Ni matrix was almost twice as large as that of the normal diamond grains. Hence, the CNT-coated diamond grains are very useful for improving the tool life of electroplated diamond tools.
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