作者: J. L GUICHARD , O TILLEMENT , A MOCELLIN
关键词: Metallurgy 、 Nanocomposite 、 Powder metallurgy 、 Microstructure 、 Composite material 、 Nanometre 、 Hot pressing 、 Cermet 、 Materials science 、 Sintering 、 Fracture toughness
摘要: Alumina composites with 0–36 vol% iron metal dispersed inclusions have been prepared by a new processing route. Nanostructured powders were synthesized high energy dry ball-milling process and then consolidated sintering at 1700 K under pressure of 30 MPa. The materials consist micrometre-size Al2O3 metallic Fe in isolated regions from 10 μm down to nanometre size. From low contents, the same type interwoven microstructure is observed. Hardness, elastic shear moduli, fracture toughness size vary regularly content. Addition increased 3.0 8 MPa m1/2.