アルミニウム単結晶の迅速方位決定法(1)

最大光輝法および光像法

抄録

Two simple methods for determining orientations of single crystals, the etch-glitter method (Barrett's method) and the light figure method, were studied for the pourpose of applying to the aluminum specimens in the plate from. The Barrett's reagent was used as etchant for both methods. Investigations were carried out on various factors affecting the accuracies of the methods; etching time, orienation of crystal, condition of the surface, purity of aluminum, and temperature of etchant.
The accuracies of those methods are varied especially by the orientation of crystal and are greatly reduced for the specimens with a surface nearly paralleled to the (100) plane because of the enhanced resistance to attack by the etchant. For high-purity aluminm (99.99% Al), attack by the etchant is not uniform but concetrated on a few etch-pits, so it is hard to determine the orientations of high-purity aluminum crystals by means of those methods.