CO_2激光诱导聚酰胺的融化特征与机理研究  

Characteristic and Mechanism of CO_2 Laser-Induced Melting to PA

作　　者：谭文胜[1,2] 周建忠[1] 黄舒[1] 樊玉杰[3] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]常州信息职业技术学院,江苏常州213164 [3]江苏科技大学机械工程学院,江苏镇江212003

出　　处：《应用激光》2013年第3期299-303,共5页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:51175236);教育部博士点基金资助项目(项目编号:200802990004);江苏省自然科学基金资助项目(项目编号:BK2010351);江苏高校优势学科建设工程(2010)资助课题;江苏省普通高校研究生科研创新计划资助项目(项目编号:CXZZ11_0545);江苏省光子制造科学与技术重点实验室开放基金资助项目(项目编号:GZ201205)

摘　　要：为了探索CO2激光对聚酰胺材料的热效应融化机理,在常温下,利用低功率CO2激光对聚酰胺PA12进行定位和扫描辐照融化实验,通过光学显微镜和扫描电镜(SEM)观察形貌特征,以及X射线衍射仪(XRD)分析微观结构,研究激光参数和辐照方式对融化特征的影响。实验发现,在光斑直径2 mm时,激光功率<1 W试样融化不明显,激光功率>3 W热分解显著,激光功率密度0.32 W/mm2是试样融化阈值;激光定位辐照获得固体试样的浅表层融化,当激光扫描辐照时,试样融化深度随激光功率和扫描次数的增大而加深直至完全融化;试样融化后的结晶度有明显提高。实验结果和理论研究相吻合,这对于利用CO2激光进行聚酰胺材料的微成型加工有指导意义。In order to investigate the melting mechanism between CO2 laser and Polyamide materials, the melting experiment of PA 12 was carried out by low-power CO2 laser with static or scanning way under room temperature, and the morphology of melted samples have been examined by means of light microscopy, scanning electron microscopy （SEM） and X-ray Diffraction （XRD）, meanwhile, the effect of laser irradiation method and process parameters to melting samples was analyzed. It can be seen that the melting of sample was not obvious with beam 2 mm and power 〈 1 W, while experimental samples were got pyrogenic ablation with laser power 〉3 W during irradiating, so power intensity 0.32 W/mm2 is the sample melting threshold. The surface of samples can be melted by static irradiation, while melting depth of samples will increase with the increased laser power and scanning times, and the crystalline of melted samples have obviously improved after irradiation. The results of experiment were in good agreement with theoretical research, which will provide guidance for Polyamide materials micro-processing by CO2 laser.

关 键 词：CO2激光 激光辐照 融化实验 聚酰胺 

分 类 号：TN249[电子电信—物理电子学]