The Role of Feedstock Particle Size on the Microstructural Behavior of Plasma-Sprayed YSZ Deposits During Annealing

Published

March 1, 1999

Author(s)

H Boukari, Andrew J. Allen, Gabrielle G. Long, J Ilavsky, Jay S. Wallace, C C. Berndt, H Herman

Abstract

We have studied the microstructure of thick plasma-sprayed yttrium-stabilized zirconia deposits fabricated from different initial feedstock particle size (32, 47, 56 and 88) m in a series of mulitiple and Porod small-angle neutron scattering experiments. Using a recently-developed three-void model and traditional Porod theory we have determined the average size, volume fraction, surface area, and orientation distribution of each void component within the deposits. Except for the coarse (88 m) feedstock powder, we find no significant variations in the microstructual anisotropies, the porosities (13 1 %), or the surface areas in the non-annealed deposits. When the deposits are annealed at higher temperatures, the microstructures are altered with a reduction of the total surface area and a mild coarsening of the voids. We correlate these results with the elastic modulus measurements of the deposits.

Proceedings Title

Proceedings of United Thermal Conference

Volume

17

Issue

No. 19

Conference Dates

March 1, 1999

Conference Location

Dusseldorf, GE

Conference Title

UTSC Conference

Pub Type

Conferences

Keywords

feedstock powder, plasma-sprayed ytrrium-stabilized, YSZ deposits

Citation

Boukari, H. , Allen, A. , Long, G. , Ilavsky, J. , Wallace, J. , Berndt, C. and Herman, H. (1999), The Role of Feedstock Particle Size on the Microstructural Behavior of Plasma-Sprayed YSZ Deposits During Annealing, Proceedings of United Thermal Conference, Dusseldorf, GE (Accessed December 13, 2024)