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Formation Of Surface Periodic Microstructure At Laser Irradiation Of The Multilayer Ni/cu/cr System

机译:多层Ni / cu / cr体系激光辐照下表面周期性微结构的形成

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The effect of periodic pulsed laser irradiation (λ = 1.06 μm and power density of 0.6-0.8 × 10~4 W/cm~2) on the solid-phase reaction in thin-film Ni/Cu/Cr structure (each layer of 100 nm thick) is studied by means of Auger electron spectroscopy and scanning electron microscopy. Thin-film structure is found to transform under irradiation into eutectic Cr-Ni structure with the particles of the leading Cr(Ni) phase having the radii equal to the total thickness of the film (300 nm). Eutectic colonies of these particles form the surface microstructure which consists of periodic arc-shaped bands with bars between them. The laser-induced diffusion is shown to occur under the sign-variable temperature gradient (~10~5 K/s), high deformation rate (~20 s~(-1)), and large dislocation flow (pv ~ 10~(11) cm ~1 s~1) at low deformation degree (~0.01).
机译:周期性脉冲激光辐照(λ= 1.06μm和功率密度为0.6-0.8×10〜4 W / cm〜2)对薄膜Ni / Cu / Cr结构(每层100)的固相反应的影响通过俄歇电子能谱和扫描电子显微镜研究。发现薄膜结构在辐射下转变为共晶Cr-Ni结构,前导Cr(Ni)相的颗粒半径等于薄膜的总厚度(300 nm)。这些颗粒的共晶菌落形成了表面微观结构,该表面微观结构由周期性的弧形带组成,带之间带有条。激光诱导的扩散显示在符号变量温度梯度(〜10〜5 K / s),高变形速率(〜20 s〜(-1))和大位错流(pv〜10〜()下发生。 11)cm〜1 s〜1)在低变形度(〜0.01)下。

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