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在相同激光扫描速度(20mm/s)和不同激光功率(150W,200W,250W,300W)工艺条件下,利用CO2激光对铁磁Fe73.5Cu1Nb3Si13.5B9非晶带进行了辐照处理,诱导非晶带样品发生纳米晶化。应用穆斯堡尔(Mossbauer)谱(MS)、透射电镜(TEM)和X射线衍射(XRD)对实验样品的晶化工艺、纳米晶相的组织结构、晶化量和纳米晶化机理等进行了研究。结果表明,晶化析出相是αFe(Si)单相固溶体,具有4种超精细结构;其晶粒尺寸约为10～20nm;纳米晶均匀分布在非晶基体上,形成非晶相与纳米晶化相的双相组织结构。随着激光功率的增加,纳米晶化量随着增加,可通过控制激光处理工艺参量,来实现纳米晶化量的控制。
Under the same laser scanning speed (20mm / s) and different laser powers (150W, 200W, 250W, 300W), the ferromagnetic Fe73.5Cu1Nb3Si13.5B9 amorphous zone was irradiated by CO2 laser to induce amorphous With sample nanocrystallization occurs. The crystallization process, the structure of nanocrystalline phase, the amount of crystallization and the mechanism of nanocrystallization were investigated by Mossbauer spectroscopy (MS), transmission electron microscopy (TEM) and X-ray diffraction (XRD) Study. The results show that the precipitated phase is αFe (Si) single phase solid solution and has four kinds of ultrafine structure with the grain size of about 10 ~ 20nm. The nanocrystals are uniformly distributed on the amorphous matrix to form amorphous phase and nanocrystalline Biphasic structure of the phase. With the increase of laser power, the amount of nanocrystallization increases with the laser processing process parameters to control the amount of nanocrystallization.