论文部分内容阅读
在室温下金属材料对激光的反射率很大,尤其对CO_2激光的反射率达90%以上,因此在激光相变硬化和熔凝过程中,能提高金属材料对激光吸收率的吸收涂层起到了非常重要的作用。常用金属氧化物大多为半导体或绝缘体,对激光有良好的吸收性能。本文通过金相法考察了6种金属氧化物对CO_2激光的吸收性能,并对吸收激光的性能与其能级结构的关系进行了初步探讨。研究表明,TiO_2在低或高功率密度下对CO_2激光均有较高的吸收率,可以以其作为吸光涂料的主要成分。
At room temperature, the reflectivity of metallic materials to the laser is high, especially to the CO 2 laser with a reflectivity of over 90%. Therefore, during laser phase-change hardening and fusion, the absorption of metallic materials on the laser absorptivity can be increased To a very important role. Most commonly used metal oxide semiconductor or insulator, the laser has good absorption properties. In this paper, the adsorption properties of 6 kinds of metal oxides on CO 2 laser were investigated by metallographic method, and the relation between the properties of absorbing laser and the energy level structure was also discussed. The results show that TiO 2 has high absorptivity to CO 2 laser at low or high power density, which can be used as the main component of absorptive coating.