Role of MgO nanoparticles on zirconia-toughened alumina-5 wt-% CeO2 ceramics mechanical properties

The poor hardness of zirconia-toughened alumina (ZTA) with 5 wt-% CeO 2 (ZTA5CeO 2 ) ceramic has limited its applications as a cutting insert. Therefore, in this work, the possibility of MgO nanoparticles (20 nm) as reinforcement to ZTA5CeO 2 ceramics was investigated. Mgo nanoparticles with differe...

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Bibliographic Details
Published inMaterials science and technology Vol. 32; no. 13; pp. 1316 - 1322
Main Authors Rejab, N. A., Ahmad Azhar, A. Z., Ratnam, M. M., Ahmad, Z. A.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.09.2016
SAGE Publications
Subjects
Cutting inserts
Fracture toughness
MgO nanoparticles
Nose wear area
ZTA
Cutting inserts
Nose wear area
ZTA
Fracture toughness
MgO nanoparticles
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Summary:The poor hardness of zirconia-toughened alumina (ZTA) with 5 wt-% CeO 2 (ZTA5CeO 2 ) ceramic has limited its applications as a cutting insert. Therefore, in this work, the possibility of MgO nanoparticles (20 nm) as reinforcement to ZTA5CeO 2 ceramics was investigated. Mgo nanoparticles with different weight percentages (0-2 wt-%) were added to ZTA5CeO 2 ceramics. ZTA5CeO 2 with 0.5 wt-%MgO showed the highest fracture toughness of 9.14 MPa.√m. The addition of 0.5 wt-%MgO nanoparticles showed the excellent role of MgAl 11 CeO 19 grains as a crack deflector, which consequently produced a reasonable hardness value of 1591 HV and lowered the wear areas to 0.0528 mm 2 .
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2015.1118792