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Texture and Nano Mechanical Properties of YSZ Electrolyte Thin Films Prepared by CCVD and PLD

Published online by Cambridge University Press:  10 February 2011

Z. Xu ,
C. Waters ,
X. Wang ,
N. Sudhir ,
S. Yarmolenko  and
J. Sankar
Z. Xu
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
C. Waters
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
X. Wang
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
N. Sudhir
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
S. Yarmolenko
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
J. Sankar
Affiliation:
NSF Center for Advanced Materials and Smart StructuresNorth Carolina A&T State University, Greensboro, NC 27411
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Abstract

Composite thin films of yttria stabilized zirconia (YSZ) and alumina (Al2O3) have been synthesized using liquid fuel combustion chemical vapor deposition (CCVD) and pulsed laser deposition (PLD) in the NSF Center for Advanced Materials and Smart Structures (CAMSS) at North Carolina A&T State University. With the CCVD technique, addition of alumina was realized by adding the designated amount of aluminum-organic in the reagent solution; while with PLD, doping of alumina in YSZ was accomplished by alternative ablations of an YSZ target and an alumina target. Variations in morphology, surface roughness and nano-mechanical properties of the composite thin films of Al2O3/YSZ were characterized. Crystal size of the films processed by CCVD was much larger than that processed by PLD; surface roughness follows the similar tendency. Upon high-temperature annealing, crystals in the PLD processed thin films grew up to 300 nm. The effect of Al2O3 in YSZ thin films on their nano-mechanical properties was dependent on the film deposition techniques in our research. For the films deposited by CCVD, addition of Al2O3 improved the nano hardness and elastic modulus of YSZ thin films, while a decline was observed in the mechanical properties of the films deposited by PLD.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 778: Symposium U – Mechanical Properties Derived from Nanostructuring Materials , 2003 , U6.10
Copyright
Copyright © Materials Research Society 2002

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