Fe78Si9B13非晶合金薄带线膨胀系数的研究

Research of Expansion Coefficient of Fe78Si9B13 Amorphous Alloy Ribbon

应用光的干涉原理,通过观察干涉条纹吞进或吐出圆环个数,采用电加热法,用迈克尔逊干涉仪测量Fe78Si9B13非晶合金薄带在加热状态时纵向的微小伸长量,进而实现该非晶合金薄带纵向线膨胀系数的测量。实验结果表明:当温度t在(12—33)℃之间,该合金线膨胀系数α随测量温度升高而逐渐增大;当温度t在(33-131)℃之间该合金的线膨胀系数α随测量温度升高而逐渐减小。

The vertical variation of length of amorphous alloys Fe78Si9B13 is measured with Michelson＇s interferometer by observing the number of interference fringe when the amorphous alloys is heated by electricity,then the vertical linear expansion coefficient can be obtained.The results indicate that the linear expansion coefficient increases with the increase of temperature t when 12 ℃t33 ℃,however,the linear expansion coefficient decreases with the increase of t when 33 ℃t131 ℃.