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一、引言 在迅速发展的非晶态金属材料中,钯硅系合金由于具有低声速、低声损耗特性而引起人们的很大兴趣。M.Dutoit和H.S.Chen(陈鹤寿)首先研究了φ1～2.5mm杆状PdSiAg样品中的超声衰减,G.Bellessa等测量了PdSiCu样品中纵波超声衰减和声速的温度关系,M.Bavmatz等测量了PdSi非晶合金的杨氏模量和低频内耗,这些实验研究工作对正确使用这类新材料和发展非晶固体理论无疑都有重要意义。但PdSiAg非晶合金中切变波超声衰减的温度关系和冷轧带状样品中的超声特性至今未见报道。
I. INTRODUCTION In the rapidly developing amorphous metallic materials, palladium-silicon alloy has aroused great interest because of its low speed of sound and low acoustic loss. M.Dutoit and HSChen first studied the ultrasonic attenuation in φ1 ~ 2.5mm rod-shaped PdSiAg samples. G.Bellessa et al. Measured the temperature dependence of the ultrasonic attenuation and the velocity of sound in the PdSiCu sample. M.Bavmatz et al. The Young’s modulus and low frequency internal friction of amorphous alloys, these experimental research work undoubtedly have important significance for the correct use of such new materials and the development of amorphous solid theory. However, the temperature dependence of the shear-wave ultrasonic attenuation in PdSiAg amorphous alloys and the ultrasonic characteristics in cold-rolled strip samples have not been reported so far.