Scholarlink

<p>The present study investigates the influence of surface modification of B<sub>4</sub>C nanoparticles prior to their incorporation into an AA2024 (aluminum alloy) matrix. This research uniquely combines nanoparticle functionalization with post-fabrication T6 heat treatment to produce advanced metal matrix composites via the stir-casting route. Specifically, oxygen-containing functional groups were introduced onto the surface of B<sub>4</sub>C nanoparticles to improve their wettability and interfacial adhesion with the metal matrix. The composites then underwent solution heat treatment at 540°C for 2&#xa0;h, followed by water quenching and aging at 180°C for 5&#xa0;h (T6 treatment). Quantitative image analysis of high-resolution scanning electron micrographs confirmed&#xa0;highly effective dispersion control&#xa0;of the functionalized B<sub>4</sub>C nanoparticles within the composite matrix. Rockwell hardness tests indicated that composites reinforced with functionalized B<sub>4</sub>C and subjected to T6 treatment exhibited superior hardness compared to their non-functionalized counterparts. This enhancement is attributed to the formation of intermetallic phases such as Al<sub>13</sub>Fe<sub>4</sub>, Al<sub>2</sub>Cu, FeTiO<sub>3</sub>, and Al<sub>3</sub>Ti, as observed by XRD. The wear behavior was studied under dry sliding conditions, aiming to propose a viable alternative material for automotive brake drum applications. Wear resistance against a steel disc was significantly improved in functionalized and T6-treated samples. Optimization of wear behavior was achieved using the Taguchi method. Comparative analysis revealed an approximately 20% improvement in wear resistance for the functionalized and T6-treated composite over the non-functionalized equivalent. The improved wear performance is directly mediated by the increased resistance to plastic deformation achieved through the B<sub>4</sub>C reinforcement and matrix strengthening, confirming that hardness enhancement is the dominant factor governing the tribological improvement. These findings underscore the transformative potential of surface-functionalized B<sub>4</sub>C nanoparticles in reinforcing AA2024 for next-generation lightweight and high-strength 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

Dry Sliding Wear Behavior of Functionally-Modified Nano-B4C Particulate and T6-Tempered Aluminium Alloy-Based Composite

  • 期刊论文

  • 发表日期：

    2025年12月8日

查看全文
  • Saurabh Kafaltiya,
  • Sakshi Chauhan,
  • Vinay Kumar Singh,
  • Akarsh Verma

摘要

The present study investigates the influence of surface modification of B4C nanoparticles prior to their incorporation into an AA2024 (aluminum alloy) matrix. This research uniquely combines nanoparticle functionalization with post-fabrication T6 heat treatment to produce advanced metal matrix composites via the stir-casting route. Specifically, oxygen-containing functional groups were introduced onto the surface of B4C nanoparticles to improve their wettability and interfacial adhesion with the metal matrix. The composites then underwent solution heat treatment at 540°C for 2 h, followed by water quenching and aging at 180°C for 5 h (T6 treatment). Quantitative image analysis of high-resolution scanning electron micrographs confirmed highly effective dispersion control of the functionalized B4C nanoparticles within the composite matrix. Rockwell hardness tests indicated that composites reinforced with functionalized B4C and subjected to T6 treatment exhibited superior hardness compared to their non-functionalized counterparts. This enhancement is attributed to the formation of intermetallic phases such as Al13Fe4, Al2Cu, FeTiO3, and Al3Ti, as observed by XRD. The wear behavior was studied under dry sliding conditions, aiming to propose a viable alternative material for automotive brake drum applications. Wear resistance against a steel disc was significantly improved in functionalized and T6-treated samples. Optimization of wear behavior was achieved using the Taguchi method. Comparative analysis revealed an approximately 20% improvement in wear resistance for the functionalized and T6-treated composite over the non-functionalized equivalent. The improved wear performance is directly mediated by the increased resistance to plastic deformation achieved through the B4C reinforcement and matrix strengthening, confirming that hardness enhancement is the dominant factor governing the tribological improvement. These findings underscore the transformative potential of surface-functionalized B4C nanoparticles in reinforcing AA2024 for next-generation lightweight and high-strength applications.