摘要
在CO2激光散光斑直径20mm的情况下,分别选择在不同功率静置的条件下辐照Fe78Si9B13非晶带实现部分晶化·用穆斯堡尔谱、X射线衍射和扫描电镜对原始非晶样品(Fe78Si9B13)和晶化后样品的微观结构进行了分析·结果表明:在CO2激光散光斑直径一定的条件下(20mm),分别选择激光功率250W和300W辐照非晶Fe78Si9B13样品20s,非晶样品可以实现约6%和9%的晶化·激光辐照非晶Fe78Si9B13合金的晶化相为αFe(Si),样品发生了织构现象,晶粒沿(200)面大量析出·激光晶化相产生在非晶带表面晶化层中·在其他条件一定的情况下,样品的晶化量随着激光功率的增加而增加·
The amorphous Fe_(78)Si_9B_(13) alloy was partially crystallized when it was irradiated by CO_2 laser beam with 20mm spot diameter for 20 sec at 250W and 300W as the laser power. The microstructures of the original amorphous Fe_(78)Si_9B_(13) samples and that of the crystallized samples were all analyzed by means of Mssbauer spectrum, XRD and SEM. The results showed that the amorphous Fe_(78)Si_9B_(13) alloy can be crystallized by 6% and 9 % in α-Fe(Si) phase at 250W and 300W, respectively. It was found that a textural phenomenon takes place in samples, and a massive amount of grains were precipitated along(200) crystal face. The phase crystallized by laser beam forms in the crystallized surface layers of the amorphous Fe_(78)Si_9B_(13) alloy.Under otherwise definite conditions, the crystallized portion increases with increasing laser power.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第5期433-436,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50274028)
沈阳市科技计划项目(1032040 1 01)
