Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

DOI

10.2991/icmea-16.2016.49How to use a DOI?

Keywords

Diamond, Thin Film; Hfcvd, Cutting Tools, Electrostatic Self-Assembly.

Abstract

Nanodiamond seeding is a well-established approach to enhance the nucleation density in chemical vapor deposition (CVD) diamond growth. However, nanodiamond seeding is highly dependent on the properties of nanodiamond particles, the solvent and the substrate. In this work we present a simple electrostatic self-assembly method to enhance the nucleation of diamond film on cemented carbide (WC-Co) substrates. The nanodiamond particles were adsorbed to WC-Co substrate surfaces governed by electrostatic interactions, which can be controlled by the surface groups of the particles and the pH of a solvent. By varying the pH of the media, the nanodiamond particles were rendered either positively or negatively charged. The positive charged nanodiamond particles (pH < 2.5) enhanced the nucleation of diamond on oxidized WC-Co substrates. The highest nucleation density of diamond on WC-Co substrates was achieved to be 1.0 ñ 0.1 ž 1010 cm-2, which is comparable to the highest record achieved by applying bias voltage to generate plasma. The nanodiamond particles also shortened the incubation time of diamond nucleation to less than 10 min on TiB2 interlayer. This electrostatic induced adsorption of diamond nanoparticles is crucial for the development of ultra-high nucleation densities for the growth of high performance nanocrystalline diamond films, especially for micro sized tools with sharp cutting edges applying for Micro and Nano Electro-Mechanical Systems.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Tao WANG
AU  - Stephan Handschuh-Wang
AU  - Chun-Lei JIANG
AU  - Song-Quan ZHANG
AU  - Yang YANG
AU  - Yong-Bing TANG
PY  - 2016/12
DA  - 2016/12
TI  - Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding
BT  - Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)
PB  - Atlantis Press
SP  - 297
EP  - 302
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-16.2016.49
DO  - 10.2991/icmea-16.2016.49
ID  - WANG2016/12
ER  -