Preparation and Internal Friction of Nanoscale Gallium Droplets

Autor: Huang, J.B., Fei, G.T., Shui, J.P., Cui, P., Wang, Y.Z.
Zdroj: Physica Status Solidi (A) - Applications and Materials Science; November 2002, Vol. 194 Issue: 1 p167-172, 6p
Abstrakt: A simple but effective method, ultrasonic vibration, has been used to prepare the nanoscale (hereafter n-) Ga droplets. The n-Ga droplets with average particle size of about 60–80 nm in diameter dispersed in polystyrenes (PS) have been successfully obtained. The low frequency internal friction of solid polystyrenes containing n-Ga droplets was measured. We observed for the first time, that the internal friction peak caused by n-Ga droplets appears around 313 K. The peak shifts to higher temperature with increasing frequency, indicating a relaxation peak. It is suggested that the internal friction peak is associated with the relaxation of n-Ga droplets in the cavities of matrix under applied stress.
Databáze: Supplemental Index
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