FeSiB非晶薄带的模量和膨胀系数研究

Study of elastic modulus and expansion coefficient of Fe_(78)Si_9B_(13) amorphous alloy ribbons

采用单辊法制备了宽4.5mm、厚25μm的Fe78Si9B13非晶薄带。用Q800动态热机械分析仪(DMA)分析测试非晶薄带的弹性模量、线形变和线膨胀系数随着退火工艺及测试温度的变化关系。结果表明:退火可以提高非晶薄带的弹性模量、线形变和线膨胀系数;退火态与淬态非晶薄带的弹性模量、线形变和线膨胀系数随着测试温度的变化规律相同,即弹性模量都随着测试温度的升高而减小;线形变随着测试温度的升高而增大;非晶薄带的线膨胀系数在低温时随着测试温度的升高而增大,在高温时随着测试温度的升高而减小。

In this paper. Fe78SioB13 amorphous alloy ribbons with 25 um thickness and 4.5 mm width were manufactured by single-roller method.The elastic modulus and line deformation and line expansion coefficient were investigated by Q800 DMA. The results showed that the elastic modulus and line deformation and line expansion coefficient increased after annealing. The relationship of elastic modulus and line deformation and line expansion coefficient with test temperature of annealed amorphous alloy ribbons was the same as that of quenched amorphous alloy ribbons, that is, the elastic modulus decreased and the line deformation strengthened with the test temperature increasing, the line expansion coefficient enhanced with the test temperature increasing when the temperature was lower, but the line expansion coefficient decreased with the test temperature increasing when the temperature was higher.