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首页> 外文期刊>Applied Surface Science >Physical chemistry of the femtosecond and nanosecond laser-material interaction with SiC and a SiC-TiC-TiB_2 composite ceramic compound
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Physical chemistry of the femtosecond and nanosecond laser-material interaction with SiC and a SiC-TiC-TiB_2 composite ceramic compound

机译：飞秒和纳秒级激光材料与SiC和SiC-TiC-TiB_2复合陶瓷化合物相互作用的物理化学

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摘要

The interaction of nanosecond laser pulses in the ultraviolet wavelength range and femtosecond laser pulses in the near-infrared region with the semiconductor SiC and the composite compound SiC-TiC-TiB_2 was investigated. Surface analytical techniques, such as XPS, depth profile (DP), and micro-Raman spectroscopy (μ-RS) were used to identify the chemical changes between untreated and laser-treated areas. Single-pulse irradiation led to material modifications in the condensed state in most instances. Multi-pulse results differed depending on the pulse duration. Crystal structure changes were observed as a consequence of laser-induced melting and resolidification. In air contact all components underwent oxidation reactions according to thermodynamic expectations. Exceptions were observed under exclusion of oxygen, SiC was reduced to elemental Si.
机译：研究了紫外波长范围内的纳秒激光脉冲和近红外区域的飞秒激光脉冲与半导体SiC和复合化合物SiC-TiC-TiB_2的相互作用。使用表面分析技术（例如XPS，深度轮廓（DP）和微拉曼光谱法（μ-RS））来识别未处理区域和激光处理区域之间的化学变化。在大多数情况下，单脉冲辐照导致材料在凝聚态下发生改性。多脉冲结果根据脉冲持续时间而有所不同。观察到晶体结构的变化是激光诱导的熔化和再凝固的结果。在空气接触中，所有组分均根据热力学预期进行氧化反应。在排除氧气的情况下观察到例外，SiC还原为元素Si。

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