Brillouin Light Scattering Characterisation of Gray Tone 3D Printed Isotropic Materials

Materials

Julio Andrés Iglesias Martínez¹  Johnny Moughames¹  Muamer Kadic¹  Fehima Ugarak¹  Vincent Laude¹  Alexis Mosset¹  Gwenn Ulliac¹ 

[1] Institute FEMTO-ST, CNRS, University Bourgogne Franche-Comté, 25000 Besançon, France;

关键词: 3D printed materials;    Brillouin light scattering;    elastic properties of polymers;   

DOI  :  10.3390/ma15124070

来源: DOAJ

【 摘 要 】

Three-dimensional direct laser writing technology enables one to print polymer microstructures whose size varies from a few hundred nanometers to a few millimeters. It has been shown that, by tuning the laser power during writing, one can adjust continuously the optical and elastic properties with the same base material. This process is referred to as gray-tone lithography. In this paper, we characterize by Brillouin light scattering the complex elastic constant $C_{11}$ of different reticulated isotropic polymers, at longitudinal phonon frequencies of the order of 16 GHz. We estimate the real part of the $C_{11}$ constant to vary from 7 to 11 GPa as a function of laser power, whereas its imaginary part varies between 0.25 and 0.6 GPa. The linear elastic properties are further measured at a fixed laser power as a function of temperature, from $20{}^{\circ }$C to $80{}^{\circ }$C. Overall, we show that our 3D printed samples have a good elastic quality with high Q factors only ten times smaller than fused silica at hypersonic frequencies.

【 授权许可】

Unknown