Effects of zirconium source and content on zirconia crystal form, microstructure and mechanical properties of ZTM ceramics
| Autor: | Zhenying Liu, Yan Liu, Sheng Wang, Yueqin Wang, Ling Bing Kong, Wenjie Wang, Yin Liu, Wei Lian, Rui Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Zirconium Materials science Process Chemistry and Technology chemistry.chemical_element Sintering Mullite 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Fracture toughness chemistry Flexural strength visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Cubic zirconia Ceramic Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 47:19914-19922 |
| ISSN: | 0272-8842 |
| Popis: | ZTM ceramics were successfully derived from coal gangue. The effect of zirconium source (ZrO2 and ZrOCl2∙8H2O) and content on properties of the ZTM ceramics has been studied. The phase composition, density, and microscopic morphology were characterized with X-ray diffraction (XRD), Archimedes method and scanning electron microscopy (SEM). The influence of zirconium source, sintering temperature, zirconia content on flexural properties and fracture toughness was studied. The sample, with ZrOCl2∙8H2O added 12% zirconia (Z2TM12) sintered at 1475 °C for 3 h has the highest density of 2.83 g/cm3. Partially stable t-ZrO2 was present in samples with zirconium oxychloride (ZrOCl2∙8H2O) as the zirconium source, due to the constraints of mullite crystals. Therefore, Z2TM12 had both microcrack toughening and stress phase transformation toughening mechanisms. The flexural strength was increased from 162.40 MPa to 285.04 MPa, while the fracture toughness was improved to 3.55 MPa m1/2 from 2.38 MPa m1/2. Our achievement can be used as a reference to fabricate ZTM ceramics from coal gangue with high-value additions. |
| Databáze: | OpenAIRE |
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