Study on characterization technology of porosity and fractal dimension of micro-arc oxidation coating

Abstract The porosity of the micro-arc oxidation coating pure titanium was assessed through utilization Mercury intrusion porosimetry (MIP). values were subsequently adjusted by accounting for proportion volume, resulting in a more precise determination coating’s porosity. Additionally, fractal dimension pore structure determined application linear regression equation utilizing data. findings indicate that observed numerical dispersion from image metohd is substantial, with range 34.9% between minimum and maximum values. This suggests precision validity outcomes derived this approach are inadequate; MIP capable determining both porosity, average size distribution sample, while also mitigating impact matrix test result correction, thereby yielding results verification experiment demonstrate positive correlation alteration duration, affirming reliability outcomes; Through analysis pressure, size, cumulative intrude incremental volume data obtained MIP, then be determined. Research showed as time increases, MAO gradually expands within narrow range, 2.57 finally stabilized at 2.77, indicating gradual increase complexity.