The electrical characterization of grain boundaries in ultra-fine grained Y-TZP

C.S. Chen, G.H. Chen, M.M.R. Boutz, M.M.R. Boutz, Bernard A. Boukamp, Aloysius J.A. Winnubst, Karel Jan de Vries, K.J. de Vries

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)
42 Downloads (Pure)

Abstract

Starting from a sinter reactive powder prepared by a gel precipitation technique, dense, ultra-fine grained (100–200 nm) yttria stabilized tetragonal zirconia ceramics were obtained by sinter forging at a temperature of 1100 °C or by pressureless sintering at 1150 °C. The pressureless sintered compacts were subjected to further heat treatments at temperatures of 1250–1450 °C or compressive deformation at 1250 °C under uniaxial stresses of 20–100 MPa. The obtained samples were characterized mainly by impedance spectroscopy. After compressive deformation a decrease in grain boundary resistivity was found which increased with applied stress. This can be interpreted in terms of a decrease in impurity segregation and a partial removal by compressive deformation of a poorly conducting amorphous film around the grains. It was also found that the grain boundary resistivity of samples sintered at 1150 °C could be considerably reduced by further pressureless heat treatments at temperatures above 1250 °C. This effect is probably owing to dewetting of the grain boundary and dissolution of grain boundary impurities into the bulk of the grains.
Original languageUndefined
Pages (from-to)231-234
Number of pages4
JournalMaterials science and engineering
VolumeA168
Issue number2
DOIs
Publication statusPublished - 1993

Keywords

  • METIS-106840
  • IR-12659

Cite this

Chen, C.S. ; Chen, G.H. ; Boutz, M.M.R. ; Boutz, M.M.R. ; Boukamp, Bernard A. ; Winnubst, Aloysius J.A. ; de Vries, Karel Jan ; de Vries, K.J. / The electrical characterization of grain boundaries in ultra-fine grained Y-TZP. In: Materials science and engineering. 1993 ; Vol. A168, No. 2. pp. 231-234.
@article{e6ef9edff3744de1a1a3f5147e4a8e68,
title = "The electrical characterization of grain boundaries in ultra-fine grained Y-TZP",
abstract = "Starting from a sinter reactive powder prepared by a gel precipitation technique, dense, ultra-fine grained (100–200 nm) yttria stabilized tetragonal zirconia ceramics were obtained by sinter forging at a temperature of 1100 °C or by pressureless sintering at 1150 °C. The pressureless sintered compacts were subjected to further heat treatments at temperatures of 1250–1450 °C or compressive deformation at 1250 °C under uniaxial stresses of 20–100 MPa. The obtained samples were characterized mainly by impedance spectroscopy. After compressive deformation a decrease in grain boundary resistivity was found which increased with applied stress. This can be interpreted in terms of a decrease in impurity segregation and a partial removal by compressive deformation of a poorly conducting amorphous film around the grains. It was also found that the grain boundary resistivity of samples sintered at 1150 °C could be considerably reduced by further pressureless heat treatments at temperatures above 1250 °C. This effect is probably owing to dewetting of the grain boundary and dissolution of grain boundary impurities into the bulk of the grains.",
keywords = "METIS-106840, IR-12659",
author = "C.S. Chen and G.H. Chen and M.M.R. Boutz and M.M.R. Boutz and Boukamp, {Bernard A.} and Winnubst, {Aloysius J.A.} and {de Vries}, {Karel Jan} and {de Vries}, K.J.",
year = "1993",
doi = "10.1016/0921-5093(93)90732-T",
language = "Undefined",
volume = "A168",
pages = "231--234",
journal = "Materials science and engineering",
issn = "0025-5416",
publisher = "Elsevier",
number = "2",

}

The electrical characterization of grain boundaries in ultra-fine grained Y-TZP. / Chen, C.S.; Chen, G.H.; Boutz, M.M.R.; Boutz, M.M.R.; Boukamp, Bernard A.; Winnubst, Aloysius J.A.; de Vries, Karel Jan; de Vries, K.J.

In: Materials science and engineering, Vol. A168, No. 2, 1993, p. 231-234.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The electrical characterization of grain boundaries in ultra-fine grained Y-TZP

AU - Chen, C.S.

AU - Chen, G.H.

AU - Boutz, M.M.R.

AU - Boutz, M.M.R.

AU - Boukamp, Bernard A.

AU - Winnubst, Aloysius J.A.

AU - de Vries, Karel Jan

AU - de Vries, K.J.

PY - 1993

Y1 - 1993

N2 - Starting from a sinter reactive powder prepared by a gel precipitation technique, dense, ultra-fine grained (100–200 nm) yttria stabilized tetragonal zirconia ceramics were obtained by sinter forging at a temperature of 1100 °C or by pressureless sintering at 1150 °C. The pressureless sintered compacts were subjected to further heat treatments at temperatures of 1250–1450 °C or compressive deformation at 1250 °C under uniaxial stresses of 20–100 MPa. The obtained samples were characterized mainly by impedance spectroscopy. After compressive deformation a decrease in grain boundary resistivity was found which increased with applied stress. This can be interpreted in terms of a decrease in impurity segregation and a partial removal by compressive deformation of a poorly conducting amorphous film around the grains. It was also found that the grain boundary resistivity of samples sintered at 1150 °C could be considerably reduced by further pressureless heat treatments at temperatures above 1250 °C. This effect is probably owing to dewetting of the grain boundary and dissolution of grain boundary impurities into the bulk of the grains.

AB - Starting from a sinter reactive powder prepared by a gel precipitation technique, dense, ultra-fine grained (100–200 nm) yttria stabilized tetragonal zirconia ceramics were obtained by sinter forging at a temperature of 1100 °C or by pressureless sintering at 1150 °C. The pressureless sintered compacts were subjected to further heat treatments at temperatures of 1250–1450 °C or compressive deformation at 1250 °C under uniaxial stresses of 20–100 MPa. The obtained samples were characterized mainly by impedance spectroscopy. After compressive deformation a decrease in grain boundary resistivity was found which increased with applied stress. This can be interpreted in terms of a decrease in impurity segregation and a partial removal by compressive deformation of a poorly conducting amorphous film around the grains. It was also found that the grain boundary resistivity of samples sintered at 1150 °C could be considerably reduced by further pressureless heat treatments at temperatures above 1250 °C. This effect is probably owing to dewetting of the grain boundary and dissolution of grain boundary impurities into the bulk of the grains.

KW - METIS-106840

KW - IR-12659

U2 - 10.1016/0921-5093(93)90732-T

DO - 10.1016/0921-5093(93)90732-T

M3 - Article

VL - A168

SP - 231

EP - 234

JO - Materials science and engineering

JF - Materials science and engineering

SN - 0025-5416

IS - 2

ER -