Scholarlink

<p>This study produced Al-319 matrix composites reinforced with 0.025 and 0.5% Ni-based nanostructured graphene (G<sub>Ni</sub>), where the graphene was nanostructured with Ni using the Pechini method. The composites were sintered by mixing Al-319 burrs with G<sub>Ni</sub> at 750&#xa0;°C for 1&#xa0;h under 100&#xa0;mL/min flow of Ar. The resulting composite comprised an Al matrix with a series of Al<sub>4</sub>C<sub>3</sub> particles and precipitates, which act as strengthening phases and were identified using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The 0.5% G<sub>Ni</sub> content increased the elastic modulus (<i>E</i>) to 111.05 GPa with respect to the Al-319 alloy and the 0.025% G<sub>Ni</sub> composite, as determined by nanoindentation. Furthermore, pin-on-disk wear tests under a 4 N load showed that the addition of 0.5% G<sub>Ni</sub> reduced the volumetric loss to 0.72 mm<sup>3</sup> compared with the 0.025% G<sub>Ni</sub> sample, owing to the higher <i>E</i> and lubrication.</p> Graphical abstract <p></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

Sintering of aluminum-319 matrix composites reinforced with nanostructured Ni-graphenic material: Tribological and mechanical evaluation

  • 期刊论文

  • 发表日期：

    2025年12月22日

查看全文
  • L. López-Ojeda,
  • R. Muñoz-Arroyo,
  • H. M. Hdz-García,
  • J. C. Díaz-Guillén,
  • M. I. Pech-Canul,
  • Isidro Guzmán Flores,
  • J. Tapia-López,
  • J. E. Hernández Flores

摘要

This study produced Al-319 matrix composites reinforced with 0.025 and 0.5% Ni-based nanostructured graphene (GNi), where the graphene was nanostructured with Ni using the Pechini method. The composites were sintered by mixing Al-319 burrs with GNi at 750 °C for 1 h under 100 mL/min flow of Ar. The resulting composite comprised an Al matrix with a series of Al4C3 particles and precipitates, which act as strengthening phases and were identified using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The 0.5% GNi content increased the elastic modulus (E) to 111.05 GPa with respect to the Al-319 alloy and the 0.025% GNi composite, as determined by nanoindentation. Furthermore, pin-on-disk wear tests under a 4 N load showed that the addition of 0.5% GNi reduced the volumetric loss to 0.72 mm3 compared with the 0.025% GNi sample, owing to the higher E and lubrication.

Graphical abstract