The Microstructure of an Yttria-Doped Hot-Pressed Silicon Nitride.

Abstract not availableJRC.(IAM)-Institute For Advanced Material

Hi-Nicalon Reinforced Silicon Nitride Matrix Composites

The present paper reports on the fabrication and the mechanical properties of SiC (Hi-Nicalon) fibre-reinforced Si3Nu matrix composites. The composite was fabricated by liquid infiltration of an aqueous Si3N4 slurry followed by hot-pressing. The effect of fibre pre-coating with a 400 nm thick pyrolitic carbon layer was investigated. The fibre coating was found to have a significant effect on the frictional stress of the fibre-matrix interface and consequently on the fracture behaviour of the composite.JRC.(IAM)-Institute For Advanced Material

Preparation and Properties of Alumina-Cera Nano-Nano Composites.

Abstract not availableJRC.(IAM)-Institute For Advanced Material

Thermal Stability of Transition Phases in Zirconia-Doped Alumina

Alumina was prepared from aqueous salt solution by homogeneous precipitation followed by calcination in air. The dependence of the thermal stability of the transition phases on the presence of zirconia dopart and on autoclave treatment was investigated. thermal stability was increased by each of these parameters, and the greatest increase occurred with both parameters in combination to produce theta-alumina that withstood in at 1200*C without transformation to alpha-alumina. This material has potential for applications in high-temperature catalysis.JRC.(IAM)-Institute For Advanced Material