Scholarlink

<p>NiCr-Cr<sub>3</sub>C<sub>2</sub>-BaF<sub>2</sub>/CaF<sub>2</sub> is a commonly used self-lubricating composite coating prepared on the surface of the moving components operating at high temperatures. The role of oxidation in high-temperature friction and wear behavior was studied in NiCr-Cr<sub>3</sub>C<sub>2</sub>-BaF<sub>2</sub>/CaF<sub>2</sub> composite coatings. The coefficient of friction and wear rate of as-sprayed composite coatings decreased with increasing temperature&#xa0;from 600 to 800&#xa0;°C due to the formation of tribo-layer mainly containing BaCrO<sub>4</sub> and CaCrO<sub>4</sub>. However, the wear resistance of coatings decreased significantly as the oxidation time increased at 800&#xa0;°C. The supporting effect of the near surface on the upper tribo-layer was weakened due to the generation of voids near the surface of composite coating after prolonged oxidation. The present study helps further understand the failure mechanism of NiCr-Cr<sub>3</sub>C<sub>2</sub>-BaF<sub>2</sub>/CaF<sub>2</sub> coating in long service and provides an insight into the interactions between oxidation and wear in the sliding interface for multi-phase composite coatings.</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

Oxidation Dominated High-Temperature Friction and Wear Behavior of Composite Coating NiCr-Cr3C2-BaF2/CaF2

  • 期刊论文

  • 发表日期：

    2025年4月1日

查看全文
  • Kaili Feng,
  • Tianmin Shao

摘要

NiCr-Cr3C2-BaF2/CaF2 is a commonly used self-lubricating composite coating prepared on the surface of the moving components operating at high temperatures. The role of oxidation in high-temperature friction and wear behavior was studied in NiCr-Cr3C2-BaF2/CaF2 composite coatings. The coefficient of friction and wear rate of as-sprayed composite coatings decreased with increasing temperature from 600 to 800 °C due to the formation of tribo-layer mainly containing BaCrO4 and CaCrO4. However, the wear resistance of coatings decreased significantly as the oxidation time increased at 800 °C. The supporting effect of the near surface on the upper tribo-layer was weakened due to the generation of voids near the surface of composite coating after prolonged oxidation. The present study helps further understand the failure mechanism of NiCr-Cr3C2-BaF2/CaF2 coating in long service and provides an insight into the interactions between oxidation and wear in the sliding interface for multi-phase composite coatings.