Scholarlink

<p>Chromium carbide-based coatings have commonly been used for tribological applications due to their hardness, improved corrosion, and oxidation resistance in harsh environments. This study focuses on the influence of deposition processes (i.e., APS and HVAF) and binder content (i.e., pure carbide versus cemented carbide) on the coatings microstructure, mechanical, and tribological properties&#xa0;at room temperature (RT) and 450&#xa0;°C. Microstructural analysis revealed that both APS and HVAF coatings had a uniform and dense structure, while the APS coatings showed higher porosity and lower Cr<sub>3</sub>C<sub>2</sub> content due to carbide dissolution, decarburization, and oxidation. The tribological tests showed that APS-sprayed Cr<sub>3</sub>C<sub>2</sub> coating (high power condition) had the highest friction and wear rate, possibly due to their high porosity and brittle nature. The HVAF-sprayed Cr<sub>3</sub>C<sub>2</sub>-25NiCr coatings produced by 4L4 nozzle showed the lowest friction and wear loss at both temperatures (room temperature and 450&#xa0;°C).</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Influence of Deposition Process and Binder Content on the Tribological Behavior of Chromium Carbide-Based Coatings: A Comparison Between APS and HVAF Processes

  • 期刊论文

  • 发表日期：

    2025年2月6日

查看全文
  • Oluwadamilola Ogunmola,
  • Amit Roy,
  • Fadhel Ben Ettouil,
  • Alejandra I. Encalada,
  • Richard R. Chromik,
  • Ali Dolatabadi,
  • Christian Moreau,
  • Pantcho Stoyanov

摘要

Chromium carbide-based coatings have commonly been used for tribological applications due to their hardness, improved corrosion, and oxidation resistance in harsh environments. This study focuses on the influence of deposition processes (i.e., APS and HVAF) and binder content (i.e., pure carbide versus cemented carbide) on the coatings microstructure, mechanical, and tribological properties at room temperature (RT) and 450 °C. Microstructural analysis revealed that both APS and HVAF coatings had a uniform and dense structure, while the APS coatings showed higher porosity and lower Cr3C2 content due to carbide dissolution, decarburization, and oxidation. The tribological tests showed that APS-sprayed Cr3C2 coating (high power condition) had the highest friction and wear rate, possibly due to their high porosity and brittle nature. The HVAF-sprayed Cr3C2-25NiCr coatings produced by 4L4 nozzle showed the lowest friction and wear loss at both temperatures (room temperature and 450 °C).