摘要
根据红外激光划痕时在涂层表面产生的温度场的理论分析,找出涂层界面失效破坏的临界位置。在实验研究中,分析红外热成像仪对激光划痕涂层的实时温度检测结果,表明在涂层逐渐失效破坏的过程中,其表面的温度状况呈现出与理论分析结果相一致的两阶段的变化,进而说明了温度变化的转折点即是该涂层从基体脱落下来的临界位置;并通过计算得知,该涂层临界脱落点对应的激光辐射功率大约为31.92 W,这一结果直接反映了该涂层与基体结合强度的情况。
In order to find out the broken critical-position of coating interface, a theoretical analysis is made on the thermal field generated when the coating is scratched by infrared laser. The examined results of real time temperature of coating being scratched by laser are analyzed. It is indicated that the change of surface temperature of the coating presents a two-phase process, which corresponds with the results of theoretical analysis. The turning point of temperature is just the critical position where the coating breaks off from substrate. The laser power is calculated to be about 31.92 W at the critical position. The result directly reflects the adhesion strength between coating and substrate.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第11期1746-1751,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(50405035)
江苏省自然基金青年科技创新人才学术带头人项目(BK2007512)
先进数控技术江苏省高校重点实验室开放基金项目(KXJ07126)资助课题
关键词
激光技术
激光划痕
涂层临界破坏点
热成像仪
温度场
结合强度
laser technique
laser scratch
broken critical position of coating
thermograph
thermal field
adhesion strength
