Densification of zirconia-hematite nanopowders

T.P. Raming; Aloysius J.A. Winnubst; W.E. van Zyl; H. Verweij

doi:10.1016/S0955-2219(02)00272-8

Densification of zirconia-hematite nanopowders

T.P. Raming, Aloysius J.A. Winnubst, W.E. van Zyl, H. Verweij

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

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Abstract

The densification of dual-phase yttria-doped tetragonal zirconia polycrystals (Y-TZP) and -Fe2O3 (hematite) composite powders is described. Different powder synthesis methods, different forms of dry compaction processes, and two sinter methods (pressureless sintering and sinterforging) were compared. The homogeneity and average grain sizes of the sintered compacts were determined with SEM/EDX. Compacts produced from homogeneous powders that were prepared by the co-precipitation (CP) method showed large-scale phase segregation and grain growth during sintering. Compacts made from the less homogeneous sequentially precipitated (SP) powders showed far less phase segregation and relatively small grain growth during sintering. Dense (>96%) nano/nano zirconia-hematite composites were made with average grain sizes of 80 nm by sinterforging at 1000 °C and 100 MPa.

Original language	Undefined
Pages (from-to)	1053-1060
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	23
Issue number	7
DOIs	https://doi.org/10.1016/S0955-2219(02)00272-8
Publication status	Published - 2003

Keywords

IR-40714
Homogeneity
ZrO2/-Fe2O3
Composites
Densification
Nanocomposites
METIS-214004

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10.1016/S0955-2219(02)00272-8

Cite this

@article{5737911900f7497ca126f18cf2db1b4e,

title = "Densification of zirconia-hematite nanopowders",

abstract = "The densification of dual-phase yttria-doped tetragonal zirconia polycrystals (Y-TZP) and -Fe2O3 (hematite) composite powders is described. Different powder synthesis methods, different forms of dry compaction processes, and two sinter methods (pressureless sintering and sinterforging) were compared. The homogeneity and average grain sizes of the sintered compacts were determined with SEM/EDX. Compacts produced from homogeneous powders that were prepared by the co-precipitation (CP) method showed large-scale phase segregation and grain growth during sintering. Compacts made from the less homogeneous sequentially precipitated (SP) powders showed far less phase segregation and relatively small grain growth during sintering. Dense (>96%) nano/nano zirconia-hematite composites were made with average grain sizes of 80 nm by sinterforging at 1000 °C and 100 MPa.",

keywords = "IR-40714, Homogeneity, ZrO2/-Fe2O3, Composites, Densification, Nanocomposites, METIS-214004",

author = "T.P. Raming and Winnubst, {Aloysius J.A.} and {van Zyl}, W.E. and H. Verweij",

year = "2003",

doi = "10.1016/S0955-2219(02)00272-8",

language = "Undefined",

volume = "23",

pages = "1053--1060",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Densification of zirconia-hematite nanopowders

AU - Raming, T.P.

AU - Winnubst, Aloysius J.A.

AU - van Zyl, W.E.

AU - Verweij, H.

PY - 2003

Y1 - 2003

N2 - The densification of dual-phase yttria-doped tetragonal zirconia polycrystals (Y-TZP) and -Fe2O3 (hematite) composite powders is described. Different powder synthesis methods, different forms of dry compaction processes, and two sinter methods (pressureless sintering and sinterforging) were compared. The homogeneity and average grain sizes of the sintered compacts were determined with SEM/EDX. Compacts produced from homogeneous powders that were prepared by the co-precipitation (CP) method showed large-scale phase segregation and grain growth during sintering. Compacts made from the less homogeneous sequentially precipitated (SP) powders showed far less phase segregation and relatively small grain growth during sintering. Dense (>96%) nano/nano zirconia-hematite composites were made with average grain sizes of 80 nm by sinterforging at 1000 °C and 100 MPa.

AB - The densification of dual-phase yttria-doped tetragonal zirconia polycrystals (Y-TZP) and -Fe2O3 (hematite) composite powders is described. Different powder synthesis methods, different forms of dry compaction processes, and two sinter methods (pressureless sintering and sinterforging) were compared. The homogeneity and average grain sizes of the sintered compacts were determined with SEM/EDX. Compacts produced from homogeneous powders that were prepared by the co-precipitation (CP) method showed large-scale phase segregation and grain growth during sintering. Compacts made from the less homogeneous sequentially precipitated (SP) powders showed far less phase segregation and relatively small grain growth during sintering. Dense (>96%) nano/nano zirconia-hematite composites were made with average grain sizes of 80 nm by sinterforging at 1000 °C and 100 MPa.

KW - IR-40714

KW - Homogeneity

KW - ZrO2/-Fe2O3

KW - Composites

KW - Densification

KW - Nanocomposites

KW - METIS-214004

U2 - 10.1016/S0955-2219(02)00272-8

DO - 10.1016/S0955-2219(02)00272-8

M3 - Article

SN - 0955-2219

VL - 23

SP - 1053

EP - 1060

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 7

ER -