Materials Science and Engineering Calendar

Materials Science and Engineering Calendar

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Event Detail Information

SpeakerJessica Krogstad, Department of Mechanical Engineering, Johns Hopkins University
Date Feb 21, 2013
Time 2:00 pm  
Location 280 Materials Research Laboratory
Sponsor Department of Materials Science and Engineering
Event type Seminar/Symposium
Views 322
Originating Calendar MatSE Seminars

"Design of next generation thermal barrier coatings" -  Zirconia-based ceramics have long been used to provide thermal protection to the structural components of modern gas turbine engines. Economic and environmental considerations have motivated higher engine operating temperatures (>1200'C), thereby demanding more reliable performance of such thermal barrier coatings (TBCs) over an even wider temperature range. Recent work has shown that, in these temperature regimes, microstructural and phase evolution may limit the performance of commonly employed TBC systems, such as yttria-stabilized zirconia (YSZ). However, lessons learned from the YSZ system can be applied to optimize novel TBC mate'rial systems. Development of these systems hinges upon collective im'provement of an array of intimately coupled materials properties. Of these, phase stability is key to maximizing both longevity and engine operating temperature. Current schemes for improving phase stability without sacri'ficing other important materials properties, like toughness, will be explored.

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