Scholarlink

<p>Titanium and its alloys are extensively utilized in aggressive environments like aviation and power generation sectors, where surface degradation through erosion plays a critical role in component performance and life. For this present study, TiO₂-SiC cermet coatings were coated on Ti base substrate using the High-Velocity Oxy-Fuel (HVOF) spraying technique with varying SiC reinforcement levels—uncoated alloy (Ti), TiO₂ coatings (T0), 5 wt.% SiC (T5), 10 wt.% SiC (T10), and 15 wt.% SiC (T15)—with the aim of improving erosion-resistant of the deposit. The coatings were examined through the solid particle erosion testing with considering the effect of particle velocity, particle flux rate, and impingement angle impacts on the erosion behavior of the coatings. Microstructural inspection showed a monotonic decrease in porosity from 6.4 vol.% of T0 to 2.1 vol.% for T10, accompanied by the corresponding increase in microhardness from 612 HV₀.₃ to 856 HV₀.₃. The T10 coating, specifically, showed better erosion resistance, with erosion rates decreased by 60.4% (from 0.48&#xa0;mg/g to 0.19&#xa0;mg/g) at 100&#xa0;m/s particle velocity, 47.4% (from 2.75&#xa0;mg/g to 2.22&#xa0;mg/g) at an impingement angle of 90°, and 67.3% (from 0.55&#xa0;mg/g 0.18&#xa0;mg/g) at a particle flux of 5&#xa0;g/m, as compared to T0. In addition, Atomic Force Microscopy (AFM) validated a denser and smoother surface with roughness reduced from 5.3&#xa0;µm (T0) to 2.9&#xa0;µm (T10). These results prove that TiO₂-SiC HVOF-sprayed coatings, when sprayed with optimized SiC reinforcement and spray parameters, improve erosion resistance, mechanical performance, and surface integrity substantially, and are hence ideal for high-temperature and erosive service applications.</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

HVOF-Sprayed Silicon Carbide-Enhanced TiO₂ Cermet Coatings for Titanium Alloys: A Study on Solid Particle Erosion Behavior

  • 期刊论文

  • 发表日期：

    2025年8月2日

查看全文
  • R. Sathiyamoorthy,
  • Thirumalaikumarasamy Duraisamy,
  • Ashokkumar Mohankumar

摘要

Titanium and its alloys are extensively utilized in aggressive environments like aviation and power generation sectors, where surface degradation through erosion plays a critical role in component performance and life. For this present study, TiO₂-SiC cermet coatings were coated on Ti base substrate using the High-Velocity Oxy-Fuel (HVOF) spraying technique with varying SiC reinforcement levels—uncoated alloy (Ti), TiO₂ coatings (T0), 5 wt.% SiC (T5), 10 wt.% SiC (T10), and 15 wt.% SiC (T15)—with the aim of improving erosion-resistant of the deposit. The coatings were examined through the solid particle erosion testing with considering the effect of particle velocity, particle flux rate, and impingement angle impacts on the erosion behavior of the coatings. Microstructural inspection showed a monotonic decrease in porosity from 6.4 vol.% of T0 to 2.1 vol.% for T10, accompanied by the corresponding increase in microhardness from 612 HV₀.₃ to 856 HV₀.₃. The T10 coating, specifically, showed better erosion resistance, with erosion rates decreased by 60.4% (from 0.48 mg/g to 0.19 mg/g) at 100 m/s particle velocity, 47.4% (from 2.75 mg/g to 2.22 mg/g) at an impingement angle of 90°, and 67.3% (from 0.55 mg/g 0.18 mg/g) at a particle flux of 5 g/m, as compared to T0. In addition, Atomic Force Microscopy (AFM) validated a denser and smoother surface with roughness reduced from 5.3 µm (T0) to 2.9 µm (T10). These results prove that TiO₂-SiC HVOF-sprayed coatings, when sprayed with optimized SiC reinforcement and spray parameters, improve erosion resistance, mechanical performance, and surface integrity substantially, and are hence ideal for high-temperature and erosive service applications.