Analysis of the solidification and microstructure of two aluminium alloys reinforced with TiB₂ particles

Pedro Egizabal (1) , Garcia de Cortazar Maider (1) , Amaia Torregaray (2) , Amélie Veillere (3) , Joël Douin (4) , Jean-François Silvain (3)

1 INASMET-Tecnalia (SPAIN)
2 Materials Science Department
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
4 CEMES - Centre d'élaboration de matériaux et d'études structurales

Two aluminium alloys with 6 wt% TiB₂ particles are studied for applications where increased wear resistance and mechanical strength at high temperature are required. The incorporation of hard ceramic particles has a strong influence on the microstructure and properties of the alloys. TiB₂ particles play an important role in the nucleation of the different phases of the alloys during solidification, and in the reduction of grain size and porosity. The solidification patterns of Al-Si₇Mg_0.3 + TiB₂ (6 wt%) and Al-Cu₅MgTi + TiB₂ (6 wt%) materials are compared to their corresponding non-reinforced alloys, and the microstructures are analyzed.

Domaines: Matériaux

Pedro Egizabal, Garcia de Cortazar Maider, Amaia Torregaray, Amélie Veillere, Joël Douin, et al.. Analysis of the solidification and microstructure of two aluminium alloys reinforced with TiB₂ particles. Advanced Engineering Materials, 2011, 13 (9), pp.887-894. ⟨10.1002/adem.201100040⟩. ⟨hal-00622260⟩