Ortiz-Morales M, Frausto-Reyes C, Soto-Bernal J J, Acosta-Ortiz S E, Gonzalez-Mota R, Rosales-Candelas I
Instituto Tecnológico de Aguascalientes, Lab. de Optoelectronica, Av. A. Lopez Mateos 1801 Ote. Fracc Bonagens, Aguascalientes 20256, Mexico; Centro de Investigaciones en Óptica, A.C. Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes 20200, Mexico.
Centro de Investigaciones en Óptica, A.C. Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes 20200, Mexico.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jul 15;128:681-5. doi: 10.1016/j.saa.2014.02.201. Epub 2014 Mar 15.
Nanosecond-pulsed, infrared (1064 nm) laser irradiation was used to create periodic metal oxide coatings on the surface of two samples of commercial stainless steel at ambient conditions. A pattern of four different metal oxide zones was created using a galvanometer scanning head and a focused laser beam over each sample. This pattern is related to traverse direction of the laser beam scanning. Energy-dispersive X-ray spectroscopy (EDS) was used to find the elemental composition and Raman spectroscopy to characterize each oxide zone. Pulsed laser irradiation modified the composition of the stainless steel samples, affecting the concentration of the main components within each heat affected zone. The Raman spectra of the generated oxides have different intensity profiles, which suggest different oxide phases such as magnetite and maghemite. In addition, these oxides are not sensible to the laser power of the Raman system, as are the iron oxide powders reported in the literature. These experiments show that it is possible to generate periodic patterns of various iron oxide zones by laser irradiation, of stainless steel at ambient conditions, and that Raman spectroscopy is a useful punctual technique for the analysis and inspection of small oxide areas.
在环境条件下，使用纳秒脉冲红外（1064 nm）激光辐照在两个商用不锈钢样品表面制备周期性金属氧化物涂层。使用振镜扫描头和聚焦激光束在每个样品上创建了四个不同金属氧化物区域的图案。该图案与激光束扫描的横向方向有关。使用能量色散X射线光谱（EDS）确定元素组成，并使用拉曼光谱对每个氧化物区域进行表征。脉冲激光辐照改变了不锈钢样品的成分，影响了每个热影响区内主要成分的浓度。所生成氧化物的拉曼光谱具有不同的强度分布，这表明存在不同的氧化物相，如磁铁矿和磁赤铁矿。此外，与文献报道的氧化铁粉末不同，这些氧化物对拉曼系统的激光功率不敏感。这些实验表明，在环境条件下，通过激光辐照不锈钢可以生成各种氧化铁区域的周期性图案，并且拉曼光谱是分析和检测小氧化物区域的一种有用的定点技术。
