Structure and properties of AA 7075 reinforced with nanometric ZrO 2 obtained by ball-milling Conference Paper uri icon

abstract

  • Ball milling was used to disperse 2 and 5 wt.%25 of zirconium oxide nanoparticles into aluminum 7075 alloy. It was found that longer times are needed for the composite with 5 wt.%25 of ZrO2 to achieve a full dispersion into the matrix, unlike 2 wt.%25 composite, which required shorter times. It was evident that the content of ZrO2 influenced the milling process by affecting the powder morphology and particle size of AA 7075 powders during the milling process. It was also observed that the milling process has an effect on the zirconia powders, since the tetragonal structure was destabilized, raising the content of monoclinic phase as the ball-milling time increases. It can be concluded that zirconium oxide is a suitable reinforcing material, because its chemical stability in the ball milling process, despite the structural change observed, and qualitative homogenous dispersion can be achieved through the aluminum alloy matrix. Copyright © 2013 MS%26amp;T%2713®.
  • Ball milling was used to disperse 2 and 5 wt.%25 of zirconium oxide nanoparticles into aluminum 7075 alloy. It was found that longer times are needed for the composite with 5 wt.%25 of ZrO2 to achieve a full dispersion into the matrix, unlike 2 wt.%25 composite, which required shorter times. It was evident that the content of ZrO2 influenced the milling process by affecting the powder morphology and particle size of AA 7075 powders during the milling process. It was also observed that the milling process has an effect on the zirconia powders, since the tetragonal structure was destabilized, raising the content of monoclinic phase as the ball-milling time increases. It can be concluded that zirconium oxide is a suitable reinforcing material, because its chemical stability in the ball milling process, despite the structural change observed, and qualitative homogenous dispersion can be achieved through the aluminum alloy matrix. Copyright © 2013 MS%26amp;T'13®.

publication date

  • 2014-01-01