Modification Effect of Nanometre Zirconia on Ca-PSZ Ceramics

Liang Zhao; Shuang Yao; Jing Du

doi:10.4028/www.scientific.net/MSF.953.59

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HomeMaterials Science ForumMaterials Science Forum Vol. 953Modification Effect of Nanometre Zirconia on...

Modification Effect of Nanometre Zirconia on Ca-PSZ Ceramics

Abstract:

The modified calcium oxide partially stabilized zirconia ceramics were fabricated using ZrO₂ powder as raw materials, CaO as stabilizer, and nanometre zirconia as modification agent. The relationship between additive amount of nanometre zirconia and the performance of Ca-PSZ ceramics were researched via testing the physical properties, analyzing mineral phase composition, and observing microstructure of the samples. The results show that the introduction of nanometre zirconia powder has a significant effect on the physical properties of Ca-PSZ, with an addition of 8wt%, bulk density was up to 5.08 g/cm³, and the compressive strength reached 381 MPa. Compared with the unmodified Ca-PSZ sample, the porosity of the modified Ca-PSZ samples decreased by 40%, and the compressive strength increased by 70%. The introduction of nanometre zirconia has an inhibitory effect on the abnormal growth of zirconia grains and improves the densification of the Ca-PSZ ceramics. Through the formation of intragranular structure, nanometre zirconia can induce transgranular fracture and weaken crystalline fracture, thereby increasing the strength of the Ca-PSZ ceramics.

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Materials Science Forum (Volume 953)

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59-64

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https://doi.org/10.4028/www.scientific.net/MSF.953.59

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Online since:

May 2019

Authors:

Liang Zhao, Shuang Yao*, Jing Du

Keywords:

Ceramic, Modification Effect, Nanometre Zirconia, Partially Stabilized Zirconia

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