Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 15, Pages 12920-12929Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.06.190
Keywords
Quasi-columnar structure; Thermal barrier coatings (TBCs); Plasma spray physical vapor deposition (PS-PVD); Yttria stabilized zirconia (YSZ)
Categories
Funding
- National Natural Science Foundation of China (NFSC) [51590894, 51425102, 51231001]
Ask authors/readers for more resources
Quasi-columnar yttria stabilized zirconia (YSZ) ceramic coatings were prepared by plasma spray physical vapor deposition (PS-PVD). In order to study the formation of quasi-columnar microstructure, coating morphologies and phases were investigated for each set of deposition times and standoff distances. Co-deposited by solid particles, liquid droplets, and vapor phases, the quasi-columnar coating was featured with wedge structure where vapors nucleated on micron-sized particles and grew to columns. Compared to the quasi-columnar coating deposited at 1000 mm, an extended spray distance of 1900 mm had lower growth rates, and resulted in the coating with larger columns and more solidified YSZ particles. A three-dimensional deposition model for quasi-columnar coatings was established. Moreover, the quasi-columnar YSZ TBCs exhibited low thermal conductivity of around 1.1 W/m K at 1100 degrees C and had a lifetime of more than 1000 cycles during thermal cycling test.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available