アルミニウム箔の（１００）面占有率とトンネルエッチング性

Abstract

Aluminum specimens of 99.99% purity were rolled and annealed under various conditions. Occupation ratios of (100) planes were measured as a function of rolling reduction, annealing temperature and time. The specimens were etched at 100mA/cm2 in 5% HCl solution at 80°C and anodized at 240V. Capacitance measurements and SEM observations of pits morphology were made. It was found that high occupation ratios (more than about 80%) were obtained under a rolling/annealing sequence involving primary cold rolling of more than 90% reduction, intermediate annealing at 250°C for 5h to 350°C for 3min, secondary cold rolling of 20% to 35% reduction, and final annealing at above 300°C for 1h. Capacitance increased with the increase in the occupation ratio of the (100) planes caused by intermediate annealing, and with cube texture formation during final annealing.