Characterization of Ultra-high Temperature Ceramics via Transmission Electron Microscopy Relevant ZrB2-based Composites, TaC-based Composites and Oxides Containing SiC Chopped Fibers
Abstract
The work herein described is the final report of the third year of activity in the frame of the contract No. FA8655-12-1-3004 between the US Air Force Research Laboratory and the Institute of Science and Technology of Ceramics, National Research Council of Italy (ISTEC-CNR). Materials production and first microstructural characterization have been carried out at ISTECCNR in Faenza (Italy), transmission electron microscopy analyses have been performed at the Institute of Microelectronic and Microsystems, National Research Council of Italy (IMM-CNR) in Bologna, mechanical characterization has been performed at ISTEC-CNR in Faenza (Italy). This report deals with the production and characterization of relevant ZrB2 composites, with high refractory properties or containing short and long SiC fibers, TaC-based composites containing various types of reinforcement and at last oxides of Al and Zr containing short Hi-Nicalon fibers. Transmission electron microscopy has been used as fundamental technique to disclose the reinforcement features and their modification upon sintering of the composite. In addition some mechanical properties, like fracture toughness, strength from room temperature to 1500 C and nanoindentation, have been measured and correlated to the microstructural characteristics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 06, 2015
- Accession Number
- ADA622802
Entities
People
- Diletta Sciti
- Laura Silverstroni
Organizations
- National Research Council