[14p-2R-1~16] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

[14p-2R-13] Measurements of Longitudinal Acoustic Properties of Chemically Tempered Glasses by the Plane-Wave Ultrasonic Material Characterization System

〇Mototaka Arakawa¹, Jun-ichi Kushibiki² (1.Grad. School of Biomed. Eng., Tohoku Univ., 2.Grad. School of Eng., Tohoku Univ.)

Keywords:chemically tempered glass,velocity,attenuation coefficient

Frequency dependences of velocities and attenuation coefficients of longitudinal waves were measured for chemically tempered glasses by the plane-wave ultrasonic material characterization system. Acoustic properties were measured for a non-tempered glass specimen and a tempered glass specimen, and those of the compressive stress layer were extracted. For the compressive stress layer, the inclination of frequency dependence of the velocity and the attenuation coefficient were small. These results exhibit that the layer is stiffened.