Event Scheduled for Apr 24, 2014
Event: MSE Thesis Defense: Thermal Barrier Coatings for Aggressive Thermal Environments by Mario Pasquale Bochiechio
Location: IMS 20
Time: 03:00 pm
Details of Event:
Thesis Defense Announcement
Thursday 4/24/14 2:00- 3:00 IMS 20
Thermal Barrier Coatings for Aggressive Thermal Environments
Mario Pasquale Bochiechio
Prof. Eric H. Jordan (Major Advisor)
Prof. Mark Aindow (Associate Advisor)
Prof. George Rossetti (Associate Advisor)
Gas path temperatures within jet engine will continue to rise as engineering efforts continue improve the efficiency of the overall system. Exposures to environmental contaminants such as calcium magnesium alumino-silicates (CMAS) will, as temperature increase cause increasingly greater degradation in the performance of current YSZ as a result of chemical dissolution and premature spallation due to the loss of strain tolerance.
This work examines the use of alternative rare earth oxides available from domestic sources to enable coatings that are resistance to attack by CMAS. Thermal barrier coating systems evaluated are: Pr2Zr2O7, Nd2Zr2O7, and Di2Zr2O7 which is a combination of the former two oxides. . The work includes examination of CMAS composition effects on CMAS melting temperature, CMAS interactions with these compositions including penetration depths for each and the formation of new phase suppressing infiltration. In addition cyclic furnace durability of solution precursor sprayed coatings are carried out toe evaluate these composition for TBC use. . Di2Zr2O overall out performed the two simpler zirconates as a TBC.
Sponsored By: Materials Science and Engineering Department
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