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Title: Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis

Abstract

Abstract Phase stability is one of the crucial requirements for any material that can be used at elevated temperature applications such as thermal barrier coating ( TBC ). The most traditional TBC material, partially stabilized zirconia, limits the operating temperature due to its phase transformation. Conversely, the low thermal conductivity of fully stabilized zirconia ( YSZ ) may enable effective reduction in the surface temperature on the coated component, while avoiding deleterious phase transitions, although still being subjected to sintering and grain growth. It has been reported that addition of rare‐earths as dopants to YSZ can significantly increase resistance to grain growth at high temperature. Keeping this under consideration, this work investigates the role of rare‐earths (lanthanum and gadolinium) in increasing thermal stability of YSZ microspheres, the building blocks for high‐temperature photonics for reflective TBC . The spheres were produced by ultrasonic spray pyrolysis, and the doping led to significant improvement of stability by significant inhibition of grain growth. While the individual dopants showed significant growth and sintering inhibition up to 900°C, co‐doping with 4% (in mol) of each (Gd and La) led to coarsening resistance up to 1000°C for 3 hours, when particles retained reasonable spherical features with nanometric crystallitemore » sizes.« less

Authors:
 [1];  [1];  [2];  [2];  [3]; ORCiD logo [1]
  1. Department of Materials Science and Engineering &, NEAT ORU University of California‐Davis Davis California
  2. Institute of Physical Chemistry University of Hamburg Hamburg Germany
  3. Department of Chemical Engineering University of California‐Davis Davis California
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1393681
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Name: Journal of the American Ceramic Society Journal Volume: 100 Journal Issue: 10; Journal ID: ISSN 0002-7820
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Nafsin, Nazia, Li, Hui, Leib, Elisabeth W., Vossmeyer, Tobias, Stroeve, Pieter, and Castro, Ricardo H. R. Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis. United States: N. p., 2017. Web. doi:10.1111/jace.14971.
Nafsin, Nazia, Li, Hui, Leib, Elisabeth W., Vossmeyer, Tobias, Stroeve, Pieter, & Castro, Ricardo H. R. Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis. United States. https://doi.org/10.1111/jace.14971
Nafsin, Nazia, Li, Hui, Leib, Elisabeth W., Vossmeyer, Tobias, Stroeve, Pieter, and Castro, Ricardo H. R. Thu . "Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis". United States. https://doi.org/10.1111/jace.14971.
@article{osti_1393681,
title = {Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis},
author = {Nafsin, Nazia and Li, Hui and Leib, Elisabeth W. and Vossmeyer, Tobias and Stroeve, Pieter and Castro, Ricardo H. R.},
abstractNote = {Abstract Phase stability is one of the crucial requirements for any material that can be used at elevated temperature applications such as thermal barrier coating ( TBC ). The most traditional TBC material, partially stabilized zirconia, limits the operating temperature due to its phase transformation. Conversely, the low thermal conductivity of fully stabilized zirconia ( YSZ ) may enable effective reduction in the surface temperature on the coated component, while avoiding deleterious phase transitions, although still being subjected to sintering and grain growth. It has been reported that addition of rare‐earths as dopants to YSZ can significantly increase resistance to grain growth at high temperature. Keeping this under consideration, this work investigates the role of rare‐earths (lanthanum and gadolinium) in increasing thermal stability of YSZ microspheres, the building blocks for high‐temperature photonics for reflective TBC . The spheres were produced by ultrasonic spray pyrolysis, and the doping led to significant improvement of stability by significant inhibition of grain growth. While the individual dopants showed significant growth and sintering inhibition up to 900°C, co‐doping with 4% (in mol) of each (Gd and La) led to coarsening resistance up to 1000°C for 3 hours, when particles retained reasonable spherical features with nanometric crystallite sizes.},
doi = {10.1111/jace.14971},
journal = {Journal of the American Ceramic Society},
number = 10,
volume = 100,
place = {United States},
year = {Thu Jun 15 00:00:00 EDT 2017},
month = {Thu Jun 15 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1111/jace.14971

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Cited by: 8 works
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