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Title: Effect of Deposition Conditions on Phase Content and Mechanical Properties of Yttria-Stabilized Zirconia Thin Films Deposited by Sol-Gel/Dip-Coating

Journal Article · · Journal of Nanomaterials
DOI:https://doi.org/10.1155/2021/4449890· OSTI ID:1826048
 [1];  [1];  [2];  [1]; ORCiD logo [3]
  1. National Polytechnic Inst. (IPN), Coahuila (Mexico). Centre for Research and Advanced Studies (CINVESTAV)
  2. National Polytechnic Inst. (IPN), Coahuila (Mexico). Centre for Research and Advanced Studies (CINVESTAV); Universidad Nacional de Ingenieria (UNI), Managua (Nicaragua)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Polytechnic Inst. (IPN), Coahuila (Mexico). Centre for Research and Advanced Studies (CINVESTAV)

The effect of yttria concentration (0-33.4 mol%), extraction rates (0.17, 0.33, 0.50, and 0.67 mm s-1), and the number of layers (up to four) on the phase content, surface defects, thickness, hardness, adhesion strength, and wear rate of yttria-stabilized zirconia coatings produced by sol-gel/dip-coating were studied for its use on thermolabile substrates. At 700°C, a metastable tetragonal phase ($$\mathcal{t''}$$) was obtained even with 33.4 mol% yttria when heat treated for 24 hours; however, a fully cubic structure was attained by extending the heat treatment up to 48 hours as confirmed by Raman spectroscopy. Furthermore, it was necessary to use withdrawal speeds of at least 0.67 mm s-1 to produce defect-free coatings. Although the coatings were produced at low temperature, they showed 41% lower wear rate than steel and an adhesion strength of 30 MPa. Our work stresses the importance of the heat treatment history on the stabilization of the cubic phase in sol-gel YSZ coatings.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; Consejo Nacional de Ciencia y Tecnología (CONACYT)
Grant/Contract Number:
AC05-00OR22725; 245629
OSTI ID:
1826048
Journal Information:
Journal of Nanomaterials, Vol. 2021; ISSN 1687-4110
Publisher:
HindawiCopyright Statement
Country of Publication:
United States
Language:
English

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