Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition
In this work, for the first time, we report a novel method on the fracture toughness enhancement of 3 mol % yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramics through the incorporation of 8 mol % magnesia-partially stabilized zirconia (8 Mg-PSZ) powders having high fracture toug...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Journal of Science: Advanced Materials and Devices |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468217920300770 |
| _version_ | 1831738027483856896 |
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| author | Bilal Soylemez Ercan Sener Arife Yurdakul Hilmi Yurdakul |
| author_facet | Bilal Soylemez Ercan Sener Arife Yurdakul Hilmi Yurdakul |
| author_sort | Bilal Soylemez |
| collection | DOAJ |
| description | In this work, for the first time, we report a novel method on the fracture toughness enhancement of 3 mol % yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramics through the incorporation of 8 mol % magnesia-partially stabilized zirconia (8 Mg-PSZ) powders having high fracture toughness. Highly densified composites (x3Y-TZP/y8Mg-PSZ; where x and y vary between 0.25 and 0.75 wt. %) were obtained with a relative density over 99% by pressureless sintering. Relative density, Vickers hardness (HV) and indentation fracture toughness (KIc) were significantly improved by sintering temperature and dwell-time increment. Specifically, HV and KIc values of 0.5(3Y-TZP)/0.5(8 Mg-PSZ) composite sintered at 1500oC-2h were increased by 7% and 30%, respectively, compared to that of 3Y-TZP. Sintered bodies consisted of c-ZrO2, t-ZrO2 and m-ZrO2 phases without any new phase formation. m-ZrO2/c-ZrO2+t-ZrO2 volumetric phase ratios changed with the increase of sintering temperature and time. Stress-induced t-ZrO2→m-ZrO2 phase transformation within c-ZrO2 grains in 8 Mg-PSZ was the main mechanism for toughness enhancement. Energy absorbing mechanisms, e.g., crack-bridging, crack-deflection and crack branching were also found to contribute the blunting of cracks. It is thought that our approach presented herein can be considered not only fracture toughness enhancement but also other properties in various materials for functional and structural purposes. |
| first_indexed | 2024-12-21T13:15:03Z |
| format | Article |
| id | doaj.art-aaf2e103cf5d41c48279b9ab8fe48a73 |
| institution | Directory Open Access Journal |
| issn | 2468-2179 |
| language | English |
| last_indexed | 2024-12-21T13:15:03Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Science: Advanced Materials and Devices |
| spelling | doaj.art-aaf2e103cf5d41c48279b9ab8fe48a732022-12-21T19:02:46ZengElsevierJournal of Science: Advanced Materials and Devices2468-21792020-12-0154527534Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia additionBilal Soylemez0Ercan Sener1Arife Yurdakul2Hilmi Yurdakul3Department of Metallurgical and Materials Engineering, Alanya Alaaddin Keykubat University, Alanya-Antalya, TurkeyDepartment of Metallurgical and Materials Engineering, Alanya Alaaddin Keykubat University, Alanya-Antalya, TurkeyDepartment of Metallurgical and Materials Engineering, Alanya Alaaddin Keykubat University, Alanya-Antalya, Turkey; Department of Hand Arts, Kutahya Vocational School of Fine Arts, Kutahya Dumlupinar University, Kutahya, TurkeyDepartment of Metallurgical and Materials Engineering, Alanya Alaaddin Keykubat University, Alanya-Antalya, Turkey; Department of Mechanical Engineering, Kutahya Dumlupinar University, Kutahya, Turkey; Corresponding author. Alanya Alaaddin Keykubat University, Rafet Kayis Faculty of Engineering, Department of Metallurgical and Materials Engineering, Kestel Campus, University Street, 07450, Alanya-Antalya, Turkey. Fax: +90 242 510 6124.In this work, for the first time, we report a novel method on the fracture toughness enhancement of 3 mol % yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramics through the incorporation of 8 mol % magnesia-partially stabilized zirconia (8 Mg-PSZ) powders having high fracture toughness. Highly densified composites (x3Y-TZP/y8Mg-PSZ; where x and y vary between 0.25 and 0.75 wt. %) were obtained with a relative density over 99% by pressureless sintering. Relative density, Vickers hardness (HV) and indentation fracture toughness (KIc) were significantly improved by sintering temperature and dwell-time increment. Specifically, HV and KIc values of 0.5(3Y-TZP)/0.5(8 Mg-PSZ) composite sintered at 1500oC-2h were increased by 7% and 30%, respectively, compared to that of 3Y-TZP. Sintered bodies consisted of c-ZrO2, t-ZrO2 and m-ZrO2 phases without any new phase formation. m-ZrO2/c-ZrO2+t-ZrO2 volumetric phase ratios changed with the increase of sintering temperature and time. Stress-induced t-ZrO2→m-ZrO2 phase transformation within c-ZrO2 grains in 8 Mg-PSZ was the main mechanism for toughness enhancement. Energy absorbing mechanisms, e.g., crack-bridging, crack-deflection and crack branching were also found to contribute the blunting of cracks. It is thought that our approach presented herein can be considered not only fracture toughness enhancement but also other properties in various materials for functional and structural purposes.http://www.sciencedirect.com/science/article/pii/S2468217920300770BiomaterialsFracture toughnessMechanical properties8 Mg-PSZ3Y-TZPZirconia |
| spellingShingle | Bilal Soylemez Ercan Sener Arife Yurdakul Hilmi Yurdakul Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition Journal of Science: Advanced Materials and Devices Biomaterials Fracture toughness Mechanical properties 8 Mg-PSZ 3Y-TZP Zirconia |
| title | Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition |
| title_full | Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition |
| title_fullStr | Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition |
| title_full_unstemmed | Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition |
| title_short | Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition |
| title_sort | fracture toughness enhancement of yttria stabilized tetragonal zirconia polycrystalline ceramics through magnesia partially stabilized zirconia addition |
| topic | Biomaterials Fracture toughness Mechanical properties 8 Mg-PSZ 3Y-TZP Zirconia |
| url | http://www.sciencedirect.com/science/article/pii/S2468217920300770 |
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