Surface modification induced phase transformation and structure variation on the rapidly solidified recast layer of titanium
| Autor: | Pei Wen Peng, Yen Ru Chou, Chih Hua Yu, Ming Hong Lin, Shih Shiun Shyu, Chiung Fang Haung, Keng Liang Ou, Ming Hung Tsai |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Nanoporous Mechanical Engineering Nanotechnology Condensed Matter Physics Microstructure law.invention Contact angle chemistry.chemical_compound chemistry Optical microscope Chemical engineering Mechanics of Materials law Surface roughness Surface modification General Materials Science Yttrium orthovanadate Electron microscope |
| Zdroj: | Materials Characterization. 106:463-469 |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/j.matchar.2015.06.004 |
| Popis: | In this study, neodymium-doped yttrium orthovanadate (Nd:YVO4) as a laser source with different scanning speeds was used on biomedical Ti surface. The microstructural and biological properties of laser-modified samples were investigated by means of optical microscope, electron microscope, X-ray diffraction, surface roughness instrument, contact angle and cell cytotoxicity assay. After laser modification, the rough volcano-like recast layer with micro-/nanoporous structure and wave-like recast layer with nanoporous structure were generated on the surfaces of laser-modified samples, respectively. It was also found out that, an α → (α + rutile-TiO2) phase transition occurred on the recast layers of laser-modified samples. The Ti surface becomes hydrophilic at a high speed laser scanning. Moreover, the cell cytotoxicity assay demonstrated that laser-modified samples did not influence the cell adhesion and proliferation behaviors of osteoblast (MG-63) cell. The laser with 50 mm/s scanning speed induced formation of rough volcano-like recast layer accompanied with micro-/nanoporous structure, which can promote cell adhesion and proliferation of MG-63 cell on Ti surface. The results indicated that the laser treatment was a potential technology to enhance the biocompatibility for titanium. |
| Databáze: | OpenAIRE |
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