Investigation on Aging Behaviour of Al2O3-Sio2(Sf) / AZ91D Composites
The aging hardening curves of Al2O3-SiO2(sf) / AZ91D composites (MMCs) with different volume fraction were got, and the aging behaviors of the composites were investigated with Vickers hardness measurement, differential scanning calorimetry (DSC), transmission electron microscope (TEM) after solution treated at 415°C for 10h , and water quenched at room temperature, afterwards aged at 175°C for 0 -38h with a 2h interval. The result shows that there are three aging peaks at aging hardening curve of the composites, and that four types of β-Mg17Al12 precipitates were responsible for the aging peaks. Volume fraction of the composite affects effect of aging hardening, but does not change trend of the aging hardening curve.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
G. J. Liu et al., "Investigation on Aging Behaviour of Al2O3-Sio2(Sf) / AZ91D Composites", Advanced Materials Research, Vols. 194-196, pp. 355-358, 2011