Articolo in rivista, 2014, ENG, 10.1080/10426914.2014.912305

Consolidated Al/Al2O3 Nanocomposites by Equal Channel Angular Pressing and Hot Extrusion

Casati R.; Vedani M.; Dellasega D.; Bassani P.; Tuissi A.

1,2 : Department of Mechanical Engineering, Politecnico di Milano, Milano, Italy / 3 : Department of Energy, Politecnico di Milano, Milano, Italy / 4,5 : CNR-IENI, Lecco, Italy

This work is aimed at producing Al-matrix nanocomposites through the powder metallurgy (PM) process. An initial study on pure aluminum powder was performed to analyze the performance of different PM techniques. In particular, Al powder was refined via high-energy ball milling and consolidated by hot extrusion and equal channel angular pressing. The latter revealed to be a very efficient procedure for powder compaction (high density and hardness of the products) and it was adopted for the production of Al-based composites reinforced with 2% and 5 wt% of Al2O3 nanoparticles. The composites exhibited higher hardness than the pure aluminum sample.

Materials and manufacturing processes 30 (10), pp. 1218–1222

Keywords

Alumina, Aluminum, Ball, ECAP, Extrusion, Milling, MMNC, Nanocomposite, Powder

CNR authors

Tuissi Ausonio, Bassani Paola

CNR institutes

ICMATE – Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia