[19p-E303-1~8] 3.7 Laser processing

[19p-E303-1] Temperature Change around CFRP Cut Surface in Nanosecond UV Laser Processing

〇Masahiro Moriyama^1,5, Shuntaro Tani³, Atsushi Kosuge³, Isao Ito³, Zhigang Zhao³, Takashi Hira¹, Yohei Kobayashi^3,4, Hiroharu Tamaru^1,4, Norikatsu Mio^2,4, Makoto Kuwata-Gonokami¹, Junji Yumoto^1,4 (1.Grad. School of Sci., Univ. of Tokyo, 2.Grad. School of Eng., Univ. of Tokyo, 3.ISSP, Univ. of Tokyo, 4.UTripl, Univ. of Tokyo, 5.Toray)

Keywords:CFRP, Laser Processing

In order to study the CFRP processing mechanism by a pulsed laser with a wavelength of 258 nm, Raman spectroscopy was performed on CF around the laser cut surface, and chemical change (graphitization) of CF by laser irradiation was evaluated. Furthermore, the temperature change around the cut surface was also evaluated from the spectral shapes of CF and resin. From the Raman spectrum of CF, it was found that CF graphitization did not occur and the temperature of CF at the cut surface was less than 2000 K.