Atomic-scale insight and design principles for turbine engine thermal barrier coatings from theory

Kristen A. Marino, Berit Hinnemann, Emily A. Carter

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

To maximize energy efficiency, gas turbine engines used in airplanes and for power generation operate at very high temperatures, even above the melting point of the metal alloys from which they are comprised. This feat is accomplished in part via the deposition of a multilayer, multicomponent thermal barrier coating (TBC), which lasts up to approximately 40,000 h before failing. Understanding failure mechanisms can aid in designing circumvention strategies. We review results of quantum mechanics calculations used to test hypotheses about impurities that harm TBCs and transition metal (TM) additives that render TBCs more robust. In particular, we discovered a number of roles that Pt and early TMs such as Hf and Y additives play in extending the lifetime of TBCs. Fundamental insight into the nature of the bonding created by such additives and its effect on high-temperature evolution of the TBCs led to design principles that can be used to create materials for even more efficient engines.

Original languageEnglish (US)
Pages (from-to)5480-5487
Number of pages8
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number14
DOIs
StatePublished - Apr 5 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'Atomic-scale insight and design principles for turbine engine thermal barrier coatings from theory'. Together they form a unique fingerprint.

  • Cite this