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<p>This study investigates the dry sliding wear behavior of thermally sprayed WC-12Co coating modified with CeO₂. Coatings were developed using HVOF spraying followed by microwave post-treatment to enhance microstructural integrity. The addition of CeO₂ aimed to refine grain structure and improve high-temperature wear resistance. Sliding wear tests were conducted at the temperatures of RT, 200, 400, and 600 ℃ with various loading conditions like 20&#xa0;N and 40&#xa0;N using a pin-on-disc apparatus. Results revealed that CeO₂-modified coatings exhibited lower wear rates and enhanced oxidation resistance compared. Microwave fusion further improved coating hardness due to densification. SEM and EDS analyses confirmed a denser microstructure and reduced porosity in fused coatings. The synergistic effect of CeO₂ and microwave fusion significantly improved wear performance. This work demonstrates the potential of advanced processing and rare earth modification for high-performance wear-resistant coatings.</p>

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Evaluation of Dry Sliding Wear Behavior at Elevated Temperatures for Thermal Sprayed and Microwave-Fused WC-12Co Coatings with CeO₂ Modification

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • D G Pradeep,
  • H S Nithin,
  • B N Sharath,
  • T G Yashas Gowda,
  • R Raghavendra Rao,
  • Mahantayya Mathapati

摘要

This study investigates the dry sliding wear behavior of thermally sprayed WC-12Co coating modified with CeO₂. Coatings were developed using HVOF spraying followed by microwave post-treatment to enhance microstructural integrity. The addition of CeO₂ aimed to refine grain structure and improve high-temperature wear resistance. Sliding wear tests were conducted at the temperatures of RT, 200, 400, and 600 ℃ with various loading conditions like 20 N and 40 N using a pin-on-disc apparatus. Results revealed that CeO₂-modified coatings exhibited lower wear rates and enhanced oxidation resistance compared. Microwave fusion further improved coating hardness due to densification. SEM and EDS analyses confirmed a denser microstructure and reduced porosity in fused coatings. The synergistic effect of CeO₂ and microwave fusion significantly improved wear performance. This work demonstrates the potential of advanced processing and rare earth modification for high-performance wear-resistant coatings.