Comparison between excimer laser irradiation effects in FeCr-based metallic glass and stainless steel

International Journal of Inorganic Materials Pub Date : 2001-11-01 Epub Date: 2001-11-19 DOI:10.1016/S1466-6049(01)00175-1

Monica Sorescu

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引用次数: 2

Abstract

Pulsed excimer laser (248 nm, 8 ns) irradiation of Fe₇₇Cr₂B₁₆Si₅ metallic glass produces an out-of-plane reorientation of magnetic moment directions as well as changes in the resonant area of the Mössbauer spectra which depend on the irradiation time. Scanning electron microscopy (SEM) determinations linked these changes to the occurrence of molten zones subsequently resolidified. For comparison, Mössbauer spectra of the Fe/Cr18/Ni8/Ti magnetic steel showed additional features in the probability distribution of the hyperfine magnetic field, while the distribution of the Fe/Cr18/Ni8/Mo3 nonmagnetic steel remained unchanged after laser processing. For both steels, the distribution area in the Mössbauer spectra was found to decrease steadily as a function of irradiation time and the magnetic hyperfine fields showed maxima after 10 s/spot. SEM/EDX examination of the laser irradiated areas demonstrated that Ti atoms are displaced from these zones and suggest atomic rearrangements related to the features observed in the distributions of probability.

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准分子激光辐照在铁铁基金属玻璃和不锈钢中的效果比较

脉冲准分子激光(248 nm, 8 ns)辐照Fe77Cr2B16Si5金属玻璃后，产生磁矩方向的面外重定向以及Mössbauer光谱共振区随辐照时间的变化。扫描电子显微镜(SEM)的测定将这些变化与随后再凝固的熔融带的出现联系起来。对比发现，Fe/Cr18/Ni8/Ti磁性钢的Mössbauer光谱在超细磁场的概率分布上表现出额外的特征，而Fe/Cr18/Ni8/Mo3非磁性钢在激光加工后的分布保持不变。两种钢的Mössbauer光谱分布面积随辐照时间的增加而逐渐减小，超细磁场在10 s/spot后达到最大值。激光照射区域的SEM/EDX检测表明，钛原子从这些区域位移，并表明原子重排与概率分布中观察到的特征有关。

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International Journal of Inorganic Materials

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