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Catalysts based on Fenton reaction for SiC wafer in chemical magnetorheological finishing

  • Received: 31 August 2018 Accepted: 07 November 2018 Published: 15 November 2018
  • Aiming at the chemical magnetorheological finishing (CMRF) of single crystal silicon carbide (SiC) based on the Fenton reaction, concentration of hydroxyl radical produced in Fenton reaction and its influence on chemical reaction rate of SiC were detected by visible spectrophotometry, and catalytic ability of different particles was detected by the method of immersion corrosion test. The experimental results showed that surface roughness is better when the carbonyl iron powder (CIP) is used as catalyst. The lower value of pH, the higher content of hydroxyl radicals. The hydroxyl radical can react with SiC surface to form a softer SiO2 oxide layer. The acid environment can promote Fenton reaction and the polishing effect is better, while the oxidation layer of SiC surface is converted to silicate in the alkaline environmental. The SiC after CMRF can obtain the smooth surface of the surface roughness Ra 0.0817 nm when the pH value is 9.

    Citation: Huazhuo Liang, Jiabin Lu, Qiusheng Yan. Catalysts based on Fenton reaction for SiC wafer in chemical magnetorheological finishing[J]. AIMS Materials Science, 2018, 5(6): 1112-1123. doi: 10.3934/matersci.2018.6.1112

    Related Papers:

  • Aiming at the chemical magnetorheological finishing (CMRF) of single crystal silicon carbide (SiC) based on the Fenton reaction, concentration of hydroxyl radical produced in Fenton reaction and its influence on chemical reaction rate of SiC were detected by visible spectrophotometry, and catalytic ability of different particles was detected by the method of immersion corrosion test. The experimental results showed that surface roughness is better when the carbonyl iron powder (CIP) is used as catalyst. The lower value of pH, the higher content of hydroxyl radicals. The hydroxyl radical can react with SiC surface to form a softer SiO2 oxide layer. The acid environment can promote Fenton reaction and the polishing effect is better, while the oxidation layer of SiC surface is converted to silicate in the alkaline environmental. The SiC after CMRF can obtain the smooth surface of the surface roughness Ra 0.0817 nm when the pH value is 9.


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