Effect of microwave sintering on the properties of copper oxide doped Y-TZP ceramics
Author | Ramesh S. |
Author | Sara Lee K.Y. |
Author | Tan C.Y. |
Author | Wong Y.H. |
Author | Johnson Alengaram U. |
Author | Tarlochan F. |
Author | Ramesh S. |
Author | Teng W.D. |
Author | Sutharsini U. |
Author | Sarhan A.A.D. |
Available date | 2020-02-24T08:57:13Z |
Publication Date | 2018 |
Publication Name | Ceramics International |
Resource | Scopus |
ISSN | 2728842 |
Abstract | The effect of various amounts of copper oxide (CuO) up to 1 wt% on the densification behaviour and mechanical properties of 3 mol% yttria-tetragonal zirconia polycrystal (Y-TZP) were studied by using microwave (MW) sintering method. The MW sintering was performed at temperatures between 1100 ?C and 1400 ?C, with a heating rate of 30 ?C/min. and holding time of 5 min. The beneficial effect of MW in enhancing densification was also compared for the undoped and 0.2 wt% CuO-doped Y-TZP when subjected to conventional sintering (CS) method. The results showed that significant enhancement in the relative density and Vickers hardness were observed for the undoped Y-TZP when MW-sintered between 1100 ?C and 1250 ?C. It was revealed that the 0.2 wt% CuO-doped Y-TZP and MW sintered at 1250?1300 ?C could attain ? 99.8% of theoretical density, Vickers hardness of about 14.4 GPa, fracture toughness of 7.8 MPam1/2 and exhibited fine equiaxed tetragonal grain size of below 0.25 ?m. In contrast, the addition of 1 wt% CuO was detrimental and the samples exhibited about 50% monoclinic phase upon sintering coupled with poor bulk density and mechanical properties. The study also revealed that the addition of 0.2 wt% CuO and subjected to conventional sintering produced similar densification as that obtained for microwave sintering, thus indicating that the dopant played a more significant role than the sintering method. |
Sponsor | The authors thank University of Malaya for the financial support (PPP Grant No. PG091-2015A ) in carrying out this research. |
Language | en |
Publisher | Elsevier Ltd |
Subject | Copper oxide Mechanical properties Microwave sintering Sintering additive Y-TZP |
Type | Article |
Pagination | 19639 - 19645 |
Issue Number | 16 |
Volume Number | 44 |
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