The Mechanical Properties of Nano-TiO_2 Dispersed Al_(65)Cu_(20)Ti_(15)Amorphous/nanocrystalline Matrix Bulk Composite Prepared by Mechanical Alloying and High Pressure Sintering

摘要

Mechanically alloyed Al_(65)Cu_(20)Ti_(15) amorphous alloy powder with 10 wt.% nano-TiO_2 dispersion was consolidated by high pressure sintering (HPS) at room temperature and/or 300-450°C for about 1 min using a uniaxial pressure of 8GPa. The sintered material was examined by XRD and TEM. Excellent hardness and strength were obtained in selected sintered samples of 8.34 GPa and 1600 MPa respectively, although ductility was very low (< 1%).