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Preparation and Mechanical Properties of Core-Shell PS&CeO2 Composite Abrasive Particles
Shengqiang Jiang1,2,3, Jinjie Wang1, Jian Lu1
1School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 2, 2024
Summary
This study introduces novel core-shell composite abrasive particles (CSPC) made from polystyrene and cerium oxide. These particles exhibit unique flexible properties, guiding their application in chemical mechanical planarization.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Engineering
Background:
- Core-shell composite abrasive particles are crucial for advanced surface finishing applications.
- Understanding their preparation and performance is vital for optimizing polishing processes.
- Existing abrasive particles may lack the tailored mechanical properties required for specific applications like chemical mechanical planarization (CMP).
Purpose of the Study:
- To propose and investigate a novel core-shell composite abrasive particle (CSPC) composed of polystyrene (PS) and cerium oxide (CeO2).
- To analyze the microstructure, physical phase characteristics, and mechanical properties of the prepared CSPC particles.
- To evaluate the influence of structural parameters on the elastic modulus of PS microspheres and CSPC particles.
Main Methods:
- Synthesis of PS microspheres and CSPC composite abrasive particles with varying structural features.
- Morphological observation and physical/chemical characterization of particle microstructures and properties.
- Atomic force microscopy (AFM) to measure indentation load curves and determine the modulus of elasticity.
Main Results:
- Experimentally prepared PS microspheres demonstrated good dispersion, smooth surfaces, and uniform particle size.
- Synthesized CSPC particles were regular spheres with rough, rice-like surfaces, indicating soft elastic properties and a low modulus of elasticity.
- Analysis revealed the effects of dimensional and structural parameters on the elastic modulus of both PS and CSPC particles.
Conclusions:
- The developed CSPC particles possess unique rigid-outer/flexible-inner characteristics suitable for specific surface finishing needs.
- The findings provide valuable insights into the preparation technology and performance regulation of polymer microspheres and core-shell abrasives.
- This research offers guidance for the application of these novel abrasive particles in CMP processes.
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