Properties of Isostatically Hot-Pressed Silicon Nitride |
| |
| Authors: | David W.,Richerson &# JamesM.,Wimmer |
| |
| Affiliation: | Garrett Turbine Engine Co., 111 S. 34th St., Phoenix, Arizona 85010 |
| |
| Abstract: | Hot isostatic pressing was studied for densification of reaction-bonded Si3N4 containing various levels of Y2O3. Near-theoretical density was achieved for com positions containing 3 to 7 wt% Y2O3. An Si3N4-5 wt% Y2O3 composition had a 4-point flexural strength at 1375°C of 628 MPa and survived 117 h of stress rupture testing at 1400°C and 345 MPa . |
| |
| Keywords: | |
|
|
