ECAP consolidation of Al matrix composites reinforced with in-situ gamma-Al2O3 nanoparticles

作者：Casati R^*; Fabrizi A; Tuissi A; Xia K; Vedani M

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2015, 648: 113-122.

DOI：10.1016/j.msea.2015.09.025

• Aluminum
• Alumina
• Ball-milling
• Nanoparticles
• Composites

This work is aimed at proposing a method to prepare aluminum matrix composites reinforced with gamma-Al2O3 nanoparticles and at describing the effects of an in-situ reaction on the resulting nano-reinforcement dispersed throughout the metal matrix. Al nano- and micro-particles were used as starting materials. They were consolidated by equal channel angular pressing (ECAP) in as-received conditions and after undergoing high-energy ball milling. Further, gamma-Al2O3 reinforcing nanoparticles were produced in-situ from the hydroxide layer that covered the Al powder particles. The powder particle morphology and the composites microstructures were investigated by electron microscopy. The transformation process was monitored by X-ray diffraction, differential scanning calorimetry and thermo-gravimetric analysis.

• 出版日期2015-11-11