Abstract
Pure Al bicrystals were electrolytically polished and subjected to a 1: 1: 1 mixture of HCI-HNO/sub 3/-H/sub 2/O. The joint planes of these crystals had a common crystallographic axis in their two lattices; the joint plane was approximntely the plane of symmetry. The attack was not perceptible for the (111) faces and was progressively accentuated as one passed to the (100), (110), and (211) planes. The intensity of attack varies inversely with the reticular density of the plane observed. The apparent anlsotropy of the joint suggests the presence of amorphous or imperfectly crystallized matter in the irtergranular region. (T.R.H.)
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Claims 0
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