TY - JOUR
T1 - Advanced neutron and X-ray techniques for insights into the microstructure of EB-PVD thermal barrier coatings
AU - Kulkarni, Anand
AU - Goland, Allen
AU - Herman, Herbert
AU - Allen, Andrew J.
AU - Dobbins, Tabbetha
AU - DeCarlo, Francesco
AU - Ilavsky, Jan
AU - Long, Gabrielle G.
AU - Fang, Stacy
AU - Lawton, Paul
N1 - Funding Information:
This research was supported by the National Science Foundation MRSEC program at the SUNY Stony Brook under the Grant No. DMR-0080021. This work utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-9986442. We acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work. The authors wish to thank Dr. Sanjay Sampath of SUNY Stony Brook for valuable discussions and Dr. Boualem Hammouda of the NIST Center for Neutron Research and Dr. Pete Jemian of the Advanced Photon Source for scientific and technical support. The UNICAT facility at the Advanced Photon Source (APS) is supported by the University of Illinois at Urbana-Champaign, Materials Research Laboratory (U.S. DOE, the State of Illinois-IBHE-HECA, and the NSF), the Oak Ridge National Laboratory (U.S. DOE under contract with UT-Battelle LLC), the National Institute of Standards and Technology (U.S. Department of Commerce) and UOP LLC. The APS is supported by the U.S. DOE, Basic Energy Sciences, Office of Science under contract No. W-31-109-ENG-38.
PY - 2006/6/25
Y1 - 2006/6/25
N2 - The ongoing quest to increase gas turbine efficiency and performance (increased thrust) provides a driving force for materials development. While improved engine design and usage of novel materials provide solutions for increased engine operating temperatures, and hence fuel efficiency, reliability issues remain. Thermal barrier coatings (TBCs), deposited onto turbine components using the electron-beam physical vapor deposition (EB-PVD) process, exhibit unique pore architectures capable of bridging the technological gap between insulation/life extension and prime reliance. This article explores the potential of advanced X-ray and neutron techniques for comprehension of an EB-PVD TBC coating microstructure. While conventional microscopy reveals a hierarchy of voids, complementary advanced techniques allow quantification of these voids in terms of component porosities, anisotropy, size and gradient through the coating thickness. In addition, the derived microstructural parameters obtained both further knowledge of the nature and architecture of the porosity, and help establish its influence on the resultant thermal and mechanical properties.
AB - The ongoing quest to increase gas turbine efficiency and performance (increased thrust) provides a driving force for materials development. While improved engine design and usage of novel materials provide solutions for increased engine operating temperatures, and hence fuel efficiency, reliability issues remain. Thermal barrier coatings (TBCs), deposited onto turbine components using the electron-beam physical vapor deposition (EB-PVD) process, exhibit unique pore architectures capable of bridging the technological gap between insulation/life extension and prime reliance. This article explores the potential of advanced X-ray and neutron techniques for comprehension of an EB-PVD TBC coating microstructure. While conventional microscopy reveals a hierarchy of voids, complementary advanced techniques allow quantification of these voids in terms of component porosities, anisotropy, size and gradient through the coating thickness. In addition, the derived microstructural parameters obtained both further knowledge of the nature and architecture of the porosity, and help establish its influence on the resultant thermal and mechanical properties.
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U2 - 10.1016/j.msea.2006.03.070
DO - 10.1016/j.msea.2006.03.070
M3 - Article
AN - SCOPUS:33744941087
SN - 0921-5093
VL - 426
SP - 43
EP - 52
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 1-2
ER -