| Femto Second Laser Pulse에 의한 유리의 결정화 및 기계적 특성 |
| 차재민, 문필용, 김동현, 박성제, 조성학1, 류봉기 |
부산대학교 무기재료공학과
1나노공정그룹 지능형정밀기계연구부 한국기계연구원 |
| Mechanical Property and Crystallization of Glass by Femtosecond Laser Pulses |
| Jae-Min Cha, Pil-Yong Moon, Dong-Hyun Kim, Sung-Je Park, Sung-Rak Cho1, Bong-Ki Ryu |
School of Materials Science and Engineering, Pusan National University
1Nano Machining Group, Korea Institute of Machinery and Materials |
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| ABSTRACT |
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Generally, the strength achieved of glass-ceramics is higher as is the fracture toughness, as compared with the original glass. This improvement is due to the microstructure consisting of very small crystals. In this study, Ag-doped $45SiO_2-24CaO-24Na_2O-4P_2O_5$ glasses were irradiated to strengthen by the crystallization using Femto second laser Pulses. Through the UV/VIS spectroscope, XRD, Nano-indenter and SEM etc., heat-treated and irradiation of laser pulses without heat-treated samples were analyzed. Two kinds of samples, heat-treated and laser irradiated without heat-treated samples, showed the peaks in the same wavelength near 360 nm. Especially, samples irradiated by 140 mW laser with XYZ stage having at the rate of 100$~$l000 $mu$m/s had the largest absorption peak among them, and heat-treated samples was shown lower absorption range than over 90 mW laser irradiated samples. Moreover, samples irradiated by laser had higher values ($4.4~4.56{times}10^{-3}(Pa)$) of elastic modulus which related with strength of glass than values of heat-treated samples and these are 1.2$~$1 .5 times higher values than them of mother glass. |
| Key words:
Femto second laser pulse, Multi-photon |
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