Superplasticity of zirconia-alumina-spinel nanoceramic composite by spark plasma sintering of plasma sprayed powders

Xinzhang Zhou; Dustin M. Hulbert; Joshua D. Kuntz; Rajendra K. Sadangi; Vijay Shukla; Bernard H. Kear; Amiya K. Mukherjee

doi:10.1016/j.msea.2004.11.037

Superplasticity of zirconia-alumina-spinel nanoceramic composite by spark plasma sintering of plasma sprayed powders

Xinzhang Zhou, Dustin M. Hulbert, Joshua D. Kuntz, Rajendra K. Sadangi, Vijay Shukla, Bernard H. Kear, Amiya K. Mukherjee

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Zirconia 3 mol% yttria-alumina-alumina magnesia spinel nanoceramic composite was synthesized by spark plasma sintering of plasma sprayed particles. For compacts sintered from high energy ball milled powders, superplasticity was observed at temperatures between 1300 and 1450 °C and at strain rates between 10^-4 and 10^-2 s^-1, while for those without high energy ball milling, deformation at the same temperature and strain rate range did not show superplastic behavior. Also, the apparent activation energy (945 kJ/mol) of the high energy ball milled batch was much higher than that of the same composite processed from nanopowder mixtures (621 kJ/mol). The flow stresses were also higher at the same temperatures and strain rates. The difference may be related to the unique low angle grain boundaries in the grains that nucleated and grew from the metastable phase inside the plasma sprayed agglomerate at elevated temperatures. Such boundaries were not intrinsically easy to slide.

Original language	English
Pages (from-to)	353-359
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	394
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2004.11.037
State	Published - Mar 15 2005
Externally published	Yes

Funding

The authors thank Mr. J.E. Garay for sintering the samples by SPS. This work is sponsored by US Office of Naval Research under the grant # N00014-03-1-0148.

Funders	Funder number
US Office of Naval Research	N00014-03-1-0148

Keywords

High energy ball milling (HEBM)
Low angle grain boundary
Nanoceramics
Plasma spray
Spark plasma sintering (SPS)
Superplasticity

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title = "Superplasticity of zirconia-alumina-spinel nanoceramic composite by spark plasma sintering of plasma sprayed powders",

abstract = "Zirconia 3 mol% yttria-alumina-alumina magnesia spinel nanoceramic composite was synthesized by spark plasma sintering of plasma sprayed particles. For compacts sintered from high energy ball milled powders, superplasticity was observed at temperatures between 1300 and 1450 °C and at strain rates between 10-4 and 10-2 s-1, while for those without high energy ball milling, deformation at the same temperature and strain rate range did not show superplastic behavior. Also, the apparent activation energy (945 kJ/mol) of the high energy ball milled batch was much higher than that of the same composite processed from nanopowder mixtures (621 kJ/mol). The flow stresses were also higher at the same temperatures and strain rates. The difference may be related to the unique low angle grain boundaries in the grains that nucleated and grew from the metastable phase inside the plasma sprayed agglomerate at elevated temperatures. Such boundaries were not intrinsically easy to slide.",

keywords = "High energy ball milling (HEBM), Low angle grain boundary, Nanoceramics, Plasma spray, Spark plasma sintering (SPS), Superplasticity",

author = "Xinzhang Zhou and Hulbert, {Dustin M.} and Kuntz, {Joshua D.} and Sadangi, {Rajendra K.} and Vijay Shukla and Kear, {Bernard H.} and Mukherjee, {Amiya K.}",

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AU - Zhou, Xinzhang

AU - Hulbert, Dustin M.

AU - Kuntz, Joshua D.

AU - Sadangi, Rajendra K.

AU - Shukla, Vijay

AU - Kear, Bernard H.

AU - Mukherjee, Amiya K.

PY - 2005/3/15

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N2 - Zirconia 3 mol% yttria-alumina-alumina magnesia spinel nanoceramic composite was synthesized by spark plasma sintering of plasma sprayed particles. For compacts sintered from high energy ball milled powders, superplasticity was observed at temperatures between 1300 and 1450 °C and at strain rates between 10-4 and 10-2 s-1, while for those without high energy ball milling, deformation at the same temperature and strain rate range did not show superplastic behavior. Also, the apparent activation energy (945 kJ/mol) of the high energy ball milled batch was much higher than that of the same composite processed from nanopowder mixtures (621 kJ/mol). The flow stresses were also higher at the same temperatures and strain rates. The difference may be related to the unique low angle grain boundaries in the grains that nucleated and grew from the metastable phase inside the plasma sprayed agglomerate at elevated temperatures. Such boundaries were not intrinsically easy to slide.

AB - Zirconia 3 mol% yttria-alumina-alumina magnesia spinel nanoceramic composite was synthesized by spark plasma sintering of plasma sprayed particles. For compacts sintered from high energy ball milled powders, superplasticity was observed at temperatures between 1300 and 1450 °C and at strain rates between 10-4 and 10-2 s-1, while for those without high energy ball milling, deformation at the same temperature and strain rate range did not show superplastic behavior. Also, the apparent activation energy (945 kJ/mol) of the high energy ball milled batch was much higher than that of the same composite processed from nanopowder mixtures (621 kJ/mol). The flow stresses were also higher at the same temperatures and strain rates. The difference may be related to the unique low angle grain boundaries in the grains that nucleated and grew from the metastable phase inside the plasma sprayed agglomerate at elevated temperatures. Such boundaries were not intrinsically easy to slide.

KW - High energy ball milling (HEBM)

KW - Low angle grain boundary

KW - Nanoceramics

KW - Plasma spray

KW - Spark plasma sintering (SPS)

KW - Superplasticity

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Superplasticity of zirconia-alumina-spinel nanoceramic composite by spark plasma sintering of plasma sprayed powders

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Keywords

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