Event Title
Spark Plasma Heat Treated ZrB2-SiC and HfB2-SiC Composites for Ultra High Temperature Aerospace Applications
Faculty Mentor
Naidu Seetala
Location
Hamilton Hall 116
Session
Session 3
Start Date
11-4-2014 1:00 PM
End Date
11-4-2014 2:00 PM
Description
UHTC ceramics are useful for propulsion and thermal protection systems. ZrB2 and HfB2 with SiC were prepared using spark plasma heat treatment. We used PALS to study the nanoporosity, SEM for particle size distribution, and microhardness tester for Vickers hardness. HfB2 has larger vacancy clusters and nanopores with lesser concentrations compared to ZrB2 and SiC. The 10wt%SiC composite has higher hardness compared to 20wt%SiC in both ZrB2-SiC and HfB2-SiC composites. The coarse-composites showed higher open-porosity compared to nano-composites and segregations of SiC is reduced in nano case. By reducing the SPS treatment temperature, the grain growth is further reduced.
Spark Plasma Heat Treated ZrB2-SiC and HfB2-SiC Composites for Ultra High Temperature Aerospace Applications
Hamilton Hall 116
UHTC ceramics are useful for propulsion and thermal protection systems. ZrB2 and HfB2 with SiC were prepared using spark plasma heat treatment. We used PALS to study the nanoporosity, SEM for particle size distribution, and microhardness tester for Vickers hardness. HfB2 has larger vacancy clusters and nanopores with lesser concentrations compared to ZrB2 and SiC. The 10wt%SiC composite has higher hardness compared to 20wt%SiC in both ZrB2-SiC and HfB2-SiC composites. The coarse-composites showed higher open-porosity compared to nano-composites and segregations of SiC is reduced in nano case. By reducing the SPS treatment temperature, the grain growth is further reduced.