Title: Chemical catalysts of Fenton reaction for single-crystal SiC based on nanoindentation

Authors: Huazhuo Liang; Jiabin Lu; Qiusheng Yan; Tao Song

Addresses: School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China ' School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China ' School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China ' School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China

Abstract: Aiming at production of single-crystal SiC for chemical mechanical polishing, Fenton reaction, and catalytic efficiency of FeSO₄, Fe₂(SO₄)₃, FeO, Fe₃O₄, and Fe₂O₃ were studied. The mechanical properties are obtained by nanoindentation experiments. Different catalysts can promote Fenton reaction, and all reaction layers formed with the same chemical composition, atomic structure, and hardness at 1.5 GPa. When Fe₃O₄ was used as catalyst in Fenton reaction, the effect was optimal because its hardness and modulus remained low. After 2 min, the thickness of reaction layer had reached 200 nm, which can fully meet requirements of CMP. Fenton reaction depends on ability of catalyst to ionise Fe²⁺. The higher concentration of Fe²⁺, the higher concentration of OH, and the faster reaction rate of SiC surface material.

Keywords: single-crystal SiC; Fenton reaction; catalyst; nanoindentation.

DOI: 10.1504/IJAT.2018.094171

International Journal of Abrasive Technology, 2018 Vol.8 No.3, pp.232 - 244

Received: 11 Sep 2017
Accepted: 17 Apr 2018
Published online: 20 Aug 2018 *

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