Strengthening bioceramic through an approach of powder processing
| Autor: | Hao-Yu Chang, Wei-Hsing Tuan, Ying-Cen Chen, Pei-Yi Hsu, Makio Naito, Takahiro Kozawa, Akira Kondo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering technology industry and agriculture chemistry.chemical_element 02 engineering and technology Bioceramic Calcium 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Aged population Grain size 0104 chemical sciences Matrix (chemical analysis) chemistry Mechanics of Materials visual_art visual_art.visual_art_medium Cubic zirconia Ceramic Composite material 0210 nano-technology |
| Zdroj: | Advanced Powder Technology. 31:4180-4186 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2020.08.023 |
| Popis: | Bioactive ceramics, such as calcium phosphate and calcium sulfate, have gained attention with the increase of aged population. Contrast to bio-inert ceramics, such as alumina and zirconia, the strength of bioactive ceramics is much lower. The strength of calcium sulfate (CaSO4) is the lowest among all. In the present study, two approaches, involving the refinement of microstructure and the addition of nano-particles, are combined to enhance the strength. Various powder-processing treatments are adopted to facilitate these approaches. A pre-grinding treatment is applied first to reduce the matrix CaSO4 grain size. The nano-silica (SiO2) particles are then fixed onto the CaSO4 particles through an attrition milling process. The strength of CaSO4 is enhanced by 60% by adding only 1 mass% nano-SiO2 particles. The strength of the SiO2-CaSO4 composites follows the Orowan-Petch relationship, indicating that their strength is dominated by the flaws. The addition of nano-particles refines the matrix grain size, consequently, the flaw size. |
| Databáze: | OpenAIRE |
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