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在激光功率为 40— 1 60W、扫描速度为 1 0mm s、激光光斑为 2 0mm照射条件下 ,用CO2 激光辐照非晶Fe73 5Cu1 Nb3 Si1 3 5B9产生微量晶化 .利用透射穆斯堡尔谱 (TMS)技术分析了原始态和晶化后样品的超精细结构 .确定了穆斯堡尔谱的基本参数———化学位移 (IS)、四极分裂 (QS)、内磁场 (Hhf)随激光功率变化的规律 .分析表明 ,CO2 激光处理后的Fe73 5Cu1 Nb3 Si1 3 5B9非晶微量晶化提高了非晶相平均超精细磁场强度 .微量晶化相是Fe Si以DO3 结构存在 ,其谱线面积占 2 %— 3 4% ,Fe Si相中Fe原子 3d6壳层上的 1个电子跳到Si原子 3p2 壳层上形成了稳定电子组态 .
At a laser power of 40-160W, a scanning speed of 10mm s and a laser beam irradiation of 20mm, a microcrystal of amorphous Fe73Cu1Nb3Si1 3 5B9 was irradiated by CO2 laser, (TMS) was used to analyze the ultrafine structure of the original and crystallized samples. The basic parameters of Mössbauer spectroscopy were determined, such as chemical shift (IS), quadrupole split (QS), internal magnetic field (Hhf) Laser power changes.The analysis shows that the amorphous micro-crystallization of Fe73 5Cu1Nb3Si1 3 5B9 after CO2 laser treatment increases the average superfine magnetic field intensity of amorphous phase.The micro-crystallization phase is Fe3 with DO3 structure, and its spectrum The line area accounts for 2% - 34%. One electron on the 3d6 shell of Fe atom jumps to the 3p2 shell of Si atom to form a stable electron configuration.