Improvement of mechanical properties of zirconia-toughened alumina by sinter forging

Y.J. He; A.J.A. Winnubst; H. Verweij; A.J. Burggraaf

doi:10.1007/BF00366869

Improvement of mechanical properties of zirconia-toughened alumina by sinter forging

Y.J. He, A.J.A. Winnubst, H. Verweij, A.J. Burggraaf

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Abstract

ZTA powder with a composition of 85 wt% alumina/15 wt% zirconia was prepared by a gel precipitation method. Sinter forging was performed with this powder to enhance the mechanical properties of ZTA materials. The influence of processing flaws on mechanical properties of sinter forged materials and pressureless sintered materials was investigated. Sinter forging at 40 MPa effectively decreases process flaw sizes resulting in a homogeneous microstructure and improves the grain boundary structure because of large shear applied in this process. Sinter forging resulted in an increase in strength and toughness by a factor of 1.5–2 when compared with pressureless sintered compacts. The fracture energy is enhanced by a factor of two. The predominate mechanism for improvement of mechanical properties of these sinter-forged ZTA materials is grain boundary strengthening.

Original language	English
Pages (from-to)	5868-5874
Number of pages	6
Journal	Journal of materials science
Volume	29
DOIs	https://doi.org/10.1007/BF00366869
Publication status	Published - 1994

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title = "Improvement of mechanical properties of zirconia-toughened alumina by sinter forging",

abstract = "ZTA powder with a composition of 85 wt% alumina/15 wt% zirconia was prepared by a gel precipitation method. Sinter forging was performed with this powder to enhance the mechanical properties of ZTA materials. The influence of processing flaws on mechanical properties of sinter forged materials and pressureless sintered materials was investigated. Sinter forging at 40 MPa effectively decreases process flaw sizes resulting in a homogeneous microstructure and improves the grain boundary structure because of large shear applied in this process. Sinter forging resulted in an increase in strength and toughness by a factor of 1.5–2 when compared with pressureless sintered compacts. The fracture energy is enhanced by a factor of two. The predominate mechanism for improvement of mechanical properties of these sinter-forged ZTA materials is grain boundary strengthening.",

author = "Y.J. He and A.J.A. Winnubst and H. Verweij and A.J. Burggraaf",

year = "1994",

doi = "10.1007/BF00366869",

language = "English",

volume = "29",

pages = "5868--5874",

journal = "Journal of materials science",

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T1 - Improvement of mechanical properties of zirconia-toughened alumina by sinter forging

AU - He, Y.J.

AU - Winnubst, A.J.A.

AU - Verweij, H.

AU - Burggraaf, A.J.

PY - 1994

Y1 - 1994

N2 - ZTA powder with a composition of 85 wt% alumina/15 wt% zirconia was prepared by a gel precipitation method. Sinter forging was performed with this powder to enhance the mechanical properties of ZTA materials. The influence of processing flaws on mechanical properties of sinter forged materials and pressureless sintered materials was investigated. Sinter forging at 40 MPa effectively decreases process flaw sizes resulting in a homogeneous microstructure and improves the grain boundary structure because of large shear applied in this process. Sinter forging resulted in an increase in strength and toughness by a factor of 1.5–2 when compared with pressureless sintered compacts. The fracture energy is enhanced by a factor of two. The predominate mechanism for improvement of mechanical properties of these sinter-forged ZTA materials is grain boundary strengthening.

AB - ZTA powder with a composition of 85 wt% alumina/15 wt% zirconia was prepared by a gel precipitation method. Sinter forging was performed with this powder to enhance the mechanical properties of ZTA materials. The influence of processing flaws on mechanical properties of sinter forged materials and pressureless sintered materials was investigated. Sinter forging at 40 MPa effectively decreases process flaw sizes resulting in a homogeneous microstructure and improves the grain boundary structure because of large shear applied in this process. Sinter forging resulted in an increase in strength and toughness by a factor of 1.5–2 when compared with pressureless sintered compacts. The fracture energy is enhanced by a factor of two. The predominate mechanism for improvement of mechanical properties of these sinter-forged ZTA materials is grain boundary strengthening.

U2 - 10.1007/BF00366869

DO - 10.1007/BF00366869

M3 - Article

SN - 0022-2461

VL - 29

SP - 5868

EP - 5874

JO - Journal of materials science

JF - Journal of materials science

ER -

Improvement of mechanical properties of zirconia-toughened alumina by sinter forging

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