间接超声下电解液温升及微棱镜镍层反光性能

Temperature rise and reflective performance of nickel films with microprism structure electrodeposited at indirect-ultrasonic electrochemical deposition

采用间接超声搅拌方式电化学沉积生长了微棱镜反光材料工作模。研究了间接超声电沉积带来的温升原因,以及温升和空化综合作用对工作模反光性能的影响。采用X射线衍射对电沉积镍层的结构进行分析,逆反射标志测量仪测量了镍铸层的表面反光系数,并采用3D激光电子扫描显微镜观测了镍铸层的表面形貌和微棱侧面粗糙度。结果表明,在间接超声作用下,随着时间的增加,电解液温度单调增加,工作模侧面粗糙度和反光系数呈现折线变化。低频时,超声空化起主要作用;高频时,超声温升起主要作用。在70kW/m2和40kHz时,工作模的粗糙度最低,反光系数最高。

Working mould with microprism structure of reflecting material was fabricated by indirect-ultrasonic electrochemical deposition.Temperature rise reason at indirect-ultrasonic electrochemical deposition was inves-tigated.Combined influence of temperature rise and cavitation on reflective performance of working mould was studied.X-ray diffraction,retroreflectometer and 3D laser scanning microscopy system were used to analysis the structure,surface retroreflective coefficient,surface morphology and surface roughness of the casting films. The results show that electrolyte temperature was increased when increasing the time by using indirect-ultra-sonic.Surface retroreflective coefficient and roughness of working mould were increased first and then decreased when increasing the ultrasonic power.Ultrasonic cavitations account for a maj or role under low frequency,and ultrasonic temperature plays a main role under high frequency.Also,when the intensity of sound was 70 kW/m2 and the frequency was 40 kHz,the roughness of working mould was minimum and surface retroreflective co-efficient was maximum.