Metal Matrix Composites for High Temperature Turbine Blades.
Abstract
Continued development and evaluation of fiber-reinforced FeCrAlY composites, intended for gas turbine engine application at temperatures above 2000F, is described in this report. Resistance of W-1ThO2/FeCrAlY and Mo-TZM/FeCrAlY composites to thermal cycling over the temperature ranges 85-2000F and 85-2200F was determined. The W-1ThO2-reinforced system sustained 1000 cycles at the higher peak temperature cycle without damage. Mo-TZM/FeCrAlY composites sustained 1000 cycles of Tmax = 2000F and 100 cycles Tmax= 2200F without damage but failed in the 1000 cycle Tmax = 2200F test. Times-to-rupture of over 300 hours at 2100F and 35 ksi were observed for W-1ThO2/FeArCrAlY composites at the 40-45 volume percent reinforcement. On a specific strength (density normalized) basis, these data represent substantial strength improvements over current D.S. eutectic systems. Additionally, relatively low creep strains were observed for the W/FeCrAlY system compared to other candidate materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1975
- Accession Number
- ADA009298
Entities
People
- Donald J. Moracz
- Istvan J. Toth
- William D. Brentnall