The influence of alumina nanofiller and gamma irradiation on the surface potential variation of epoxy-alumina nanocomposites was investigated. The surface potential decay rate of nanocomposites has increased and the trap depth decreased with alumina nanoparticles addition to the matrix as well as upon exposure to gamma irradiation, Surface roughness was estimated using the wavelets and fractal technique. Daubechies wavelet of order 4 (db4) wavelet was chosen as the most suitable mother wavelet for surface roughness measurement. Multi resolution signal decomposition (MRSD) analysis of surface profile has revealed that with increasing wt% of alumina nanofiller in the nanocomposites, reduction in surface roughness of nanocomposites was observed. Upon gamma irradiation, the surface roughness factor at each level of MRSD has increased marginally. Fractal dimension and lacunarity were calculated for unaged and gamma ray irradiated samples and it exhibits inverse correlation.

研究了氧化铝纳米填料和伽马辐射对环氧-氧化铝纳米复合材料表面电位变化的影响。纳米复合材料的表面电位衰减率增加，陷阱深度随着氧化铝纳米颗粒添加到基质中以及暴露于伽马辐射而降低，使用小波和分形技术估计表面粗糙度。4 阶 Daubechies 小波 (db4) 小波被选为最适合表面粗糙度测量的母小波。表面轮廓的多分辨率信号分解 (MRSD) 分析表明，随着纳米复合材料中氧化铝纳米填料重量百分比的增加，观察到纳米复合材料的表面粗糙度降低。在伽马辐照下，每个 MRSD 水平的表面粗糙度系数都略有增加。