Determination of mechanical behaviors of Ho3+:BaY2F8 single crystals by nanoindentation
| Autor: | Hai-Zhi Song, Jie Deng, Zhibin Zhang, Chao Yao, Qingmin Chen, Qian Dai, Xiumin Xie, Liu Yuan, Qibin Liu, Weiying Hu, Wei Zhang, Hui Luo, Hao Xin, Yong Jiang, Haihua Huang |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Phase transition Materials science Process Chemistry and Technology Modulus 02 engineering and technology Slip (materials science) Nanoindentation 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Deformation mechanism Indentation 0103 physical sciences Materials Chemistry Ceramics and Composites Composite material Deformation (engineering) 0210 nano-technology Single crystal |
| Zdroj: | Ceramics International. 45:21751-21758 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.07.176 |
| Popis: | The high-quality 20 mol% Ho3+:BaY2F8 single crystal has been grown by the Czochralski method. The deformation, hardness and Young's modulus of Ho3+:BaY2F8 single crystals have been studied by nanoindentation measuring method. The load-depth of Ho3+:BaY2F8 single crystals were measured under different maximum loads (4–150 mN). The experimental results revealed that the plastic deformation component governs Ho3+:BaY2F8 single crystals at the indentation loads of 4–140 mN. The slip lines in directions appeared at above 30 mN indentation load and increased with indentation load increasing. With the load exceeding 140 mN, a microcrack was detected around the indentation. It is found that materials pile-up and propagation of dislocations dominate the deformation mechanism, where no phase transition occurs. The hardness and Young's modulus are 3.16 ± 0.08 GPa and ~106.9 GPa, respectively. To our best knowledge, the nanoindentation behavior of Ho3+:BaY2F8 single crystal is reported for the first time. |
| Databáze: | OpenAIRE |
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