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6CCVD Research

Surface roughness and fracture cracks of Al2O3/TiO2 composite coating by wet chemical mechanical grinding with structured abrasives pad

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-09-13
JournalJournal of Materials Research and Technology
AuthorsWeifeng Yao, Chen Zhan, Jianguo Yang, Fenfen Zhou, Tianqi Zhang
Citations7

Abstract

Section titled ā€œAbstractā€

In the fields of wind power, and other industries, the Al2O3/TiO2 coating is prepared and ground on the bearing ring, in order to obtain the insulation resisting the electrical erosion for the motors at high voltage. A novel wet chemical mechanical grinding (WCMG) method is proposed to finish this hard-brittle composite material, utilizing the structured diamond abrasives pad and the NaOH solution. The softened workpieceā€™s surface under the chemical reaction was demonstrated by means of Raman spectrum, indentation and scratching tests. The analytical model of surface roughness and fracture cracks is established based on the synthesis of geometry and kinematics, contact mechanics, material removal and indentation fracture mechanics. The surface roughness of coating was reduced from initial Sa 3.293 Ī¼m down to final Sa 0.049 Ī¼m in the WCMG process with grain size 3 Ī¼m and pH 12.01, mostly attributed to the ductile removal of chemically softened coating surface.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  2. 2024 - Study on electric erosion in grease lubrication using optical interference method [Crossref]
  3. 2023 - Electric damage of bearing under AC shaft voltage at different rotation speeds
  4. 2016 - Electrical pitting of tilting-pad thrust bearings: modelling and experimental evidence [Crossref]
  5. 2018 - Characteristics of alumina coating on SAE 52100 bearing steel with Ni-Cr bond coat [Crossref]
  6. 2009 - Fabrication and properties of plasma-sprayed Al2O3/TiO2 composite coatings: a role of nano-sized TiO2 addition
  7. 2022 - Effect of melting behavior of Al2O3 powder on the structure and dielectric properties of plasma-sprayed coatings [Crossref]
  8. 2005 - Research on chemo-mechanical-grinding (CMG) of Si wafer
  9. 2018 - Study on the finishing capability and abrasives-sapphire interaction in dry chemo-mechanical-grinding (CMG) process [Crossref]
  10. 2021 - Chemo-mechanical grinding by applying grain boundary cohesion fixed abrasive for monocrystal sapphire [Crossref]

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