In situ X-ray diffraction investigation of compression behavior in Gd_(40)Y_(16)Al_(24)Co_(20) bulk metallic glass under high pressure with synchrotron radiation  

作　　者：徐涛 黄蕾 董雁国 李工 李延春 刘景 刘日平 

机构地区：[1]National Key Laboratory of Metastable Materials Science and Technology, Yanshan University [2]BSRF, Institute of High Energy Physics, Chinese Academy of Science

出　　处：《Chinese Physics C》2009年第11期1028-1032,共5页中国物理C（英文版）

基　　金：Supported by Chinese Academy of Sciences (KJCX2-SW-N20, KJCX2-SW-N03);NSFC (50731005);SKPBRC(2007CB616915/2006CB605201);PCSIRT (IRT0650)

摘　　要：The compression behavior of the heavy RE-based BMC Gd40Y16Al24Co20 under high pressure has been investigated by in situ high pressure angle dispersive X-ray diffraction measurements using synchrotron radiation in the pressure range of 0-33.42 GPa at room temperature. By fitting the static equation of state at room temperature, we find the value of bulk modulus B is 61.27±4 GPa which is in good agreement with the experimental study by pulse-echo techniques of 58 GPa. The results show that the amorphous structure in the heavy RE-based BMG Gd40Y16Al24Co20 keeps quite stable up to 33.42 GPa although its compressibility is as large as about 33%. The coexistence of normal local structure similar to that of other BMGs and covalent bond structure similar to those of oxide glasses may be the reason for the anomalous property under high pressure of the Gd4oY16Al24Co2o BMG.The compression behavior of the heavy RE-based BMC Gd40Y16Al24Co20 under high pressure has been investigated by in situ high pressure angle dispersive X-ray diffraction measurements using synchrotron radiation in the pressure range of 0-33.42 GPa at room temperature. By fitting the static equation of state at room temperature, we find the value of bulk modulus B is 61.27±4 GPa which is in good agreement with the experimental study by pulse-echo techniques of 58 GPa. The results show that the amorphous structure in the heavy RE-based BMG Gd40Y16Al24Co20 keeps quite stable up to 33.42 GPa although its compressibility is as large as about 33%. The coexistence of normal local structure similar to that of other BMGs and covalent bond structure similar to those of oxide glasses may be the reason for the anomalous property under high pressure of the Gd4oY16Al24Co2o BMG.

关 键 词：bulk metallic glass In situ X-ray diffraction compression behavior high pressure synchrotronradiation 

分 类 号：O434.12[机械工程—光学工程]