摘要
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, laser reflectivity to metal materials is very high, especially for CO2 laser （more than 90%）. So for laser quenching and laser surface melting, absorbing coatings on metal surface have played a very important role, which can improve laser absorptivity. Most metal oxides widely used are semiconductors or insulators, and have good absorbing properties to laser. Based on metallographic method, the abilities of six kinds of metal oxides to absorb CO2 laser were studied, and the relationship between the laser absorbing abilities of metal oxides and their energy structures was discussed. Results showed TiO2 has high laser absorption ability in low or high power densities and can be used as main component of absorbing coating.
出处
《应用激光》
CSCD
北大核心
2010年第6期447-450,共4页
Applied Laser
基金
国家自然科学基金资助项目(项目编号:50971117)
浙江省自然科学基金资助项目(项目编号:Y4090451)
博士科研启动基金资助项目(项目编号:56710203006)
关键词
金属氧化物
CO2激光
吸收率
能级结构
metallic oxides
CO2z laser
absorptivity
energy level structure
