کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155435 | 1666349 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of microwave sintering on the properties of copper oxide doped Y-TZP ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effect of various amounts of copper oxide (CuO) up to 1â¯wt% on the densification behaviour and mechanical properties of 3â¯mol% yttria-tetragonal zirconia polycrystal (Y-TZP) were studied by using microwave (MW) sintering method. The MW sintering was performed at temperatures between 1100â¯Â°C and 1400â¯Â°C, with a heating rate of 30â¯Â°C/min. and holding time of 5â¯min. The beneficial effect of MW in enhancing densification was also compared for the undoped and 0.2â¯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 1100â¯Â°C and 1250â¯Â°C. It was revealed that the 0.2â¯wt% CuO-doped Y-TZP and MW sintered at 1250-1300â¯Â°C could attain â¥â¯99.8% of theoretical density, Vickers hardness of about 14.4â¯GPa, fracture toughness of 7.8 MPam1/2 and exhibited fine equiaxed tetragonal grain size of below 0.25â¯Âµm. In contrast, the addition of 1â¯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 0.2â¯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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19639-19645
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19639-19645
نویسندگان
S. Ramesh, K.Y. Sara Lee, C.Y. Tan, Y.H. Wong, U. Johnson Alengaram, F. Tarlochan, S. Ramesh, W.D. Teng, U. Sutharsini, Ahmed A.D. Sarhan,