【摘要】 用XRS法测定Sm5Fe74.3Nb1.5Si11.7B4.5C2.3Cu0.5非晶合金在相同时间不同温度和在相同温度不同时间预退火条件下的短程有序范围、最近邻原子间距结构参数,从而讨论预退火对非晶结构的影响。结果表明,非晶合金由原始态加热到400oC范围内预退火,非晶短程有序范围会随温度升高而增大,到400oC时达最大值。随温度继续升高,超过400oC时,短程有序范围开始减小,而最近邻原子间距增大。在同一温度500oC不同预退火时间,短程有序范围随时间的延长而增大,最近邻原子间距随时间的增加而减小。更多还原

【Abstract】 The amorphous structural paramete rs of the amorphous Sm5Fe74.3Nb1.5Si 11.7B4.5C2.3Cu0.5 alloy,short -range order and nearest neigh bour distance,were investigated by using XRS method under the condition of preannealing at dif ferent temperature and for differen t time.The influence of prean -nealing on amorphous structure was d iscussed.Experimental results show that the short -range order increases obviously with the increa sing temperature lower than 400oC,beyond which short -range order decreases and nearest neighbour distance increases.The values of short -range order and nearest neighbour distance reach the limit a t 400oC.Preannealing at 500oC for different time,short -range order increases with time,while nearest neighbour distance decreases.更多还原