Product Code: ICA10_P187

Variation of Topography on the Ti-Based Bulk Metallic Glass After Femtosecond Laser Irradiation
Authors:
Togo Shinonaga, Graduate School of Engineering, Osaka University; Suita, Osaka Japan
Masahiro Tsukamoto, Joining and Welding Research Institute, Osaka University; Ibaraki, Osaka Japan
Daisuke Tone, Graduate School of Engineering, Osaka University; Suita, Osaka Japan
Sayaka Maruyama, Graduate School of Science and Engineering, Tokyo Institute of Technology; Yokohama, Kanagawa Japan
Nobuhiro Matsushita, Materials and Structures Laboratory, Tokyo Institute of Technology; Yokohama, Kanagawa Japan
Takeshi Wada, Institute for Materials Research, Tohoku Univ.; Sendai, Miyagi Japan
Xinmin Wang, Institute for Materials Research, Tohoku Univ.; Sendai, Miyagi Japan
Hiroshi Honda, National Institute for Materials and Science; Tsukuba Japan
Shinji Motokoshi, Institute for Laser Technology; Suita, Osaka Japan
Masayuki Fujita, Institute for Laser Technology; Suita, Osaka Japan
Nobuyuki Abe, Joining and Welding Research Institute, Osaka Univ.; Ibaraki, Osaka Japan
Presented at ICALEO 2010

Ti-based bulk metallic glasses (BMGs) are expected to be used as new biomaterials because of their good mechanical properties and excellent corrosion resistance. However, Ti-based BMGs may not be directly joined to human bones due to their high chemical stability and bioinertness. It can be improved by surface modification, such as microstructures formation and ceramic coating. For the microstructures formation on BMGs, it is considered that the femtosecond laser is a useful tool because it provides considerable advantages for precision material processing, such as drilling and cutting into the metal, in comparison with nanosecond lasers. It is reported that various microstructures were formed on the titanium plate by femtosecond laser irradiation. However, optimum microstructures formed by femtosecond laser irradiation for improving bioactivity of Ti-based BMGs have not been investigated yet. In this study, we reported the microstructures formation on the Ti-based BMGs by femtosecond laser irradiation. The experiment for the nanosecond laser irradiation on the BMGs was also carried out. After microstructures formation, variation of topography on the Ti-based BMGs was observed by scanning electron microscope. Various microstructures were formed by femtosecond laser irradiation. By nanosecond laser irradiation, microstructures were not formed.