日本金属学会誌

J. Japan Inst. Metals, Vol. 39, No. 4 (1975),
pp. 351-357

Etch Pits at Dislocations in Zinc

Hideki Tonda1, Takushi Gotoh2, Yuusei Nakashima3 and Tatsuo Kawasaki1

1Department of Metallurgy, Faculty of Engineering, Kumamoto University, Kumamoto
2Faculty of Engineering, Kumamoto University.\address{} Present address: Graduate School, Kumamoto University, Kumamoto
3Faculty of Engineering, Kumamoto University, Kumamoto. Present address: Graduate School, Tokyo Institute of Technology, Tokyo

Abstract:

Four etchants revealing both fresh and old dislocations as etch pits in zinc (99.999%) crystals were developed. (1) G solution: The chemical composition by volume is 190 parts CH3COOH, 10 parts 35%H2O2, 1 ∼ 2 parts 36%HCl, and 50 parts H2O. This etchant produced etch pits with rhombic shapes and those with arrowhead-like shapes on 2110 and 3210 surfaces, respectively. (2) K solution: The composition is 95 parts HCOOH and 5 parts 35%H2O2. Etch pits developed on 2110 surfaces in this solution were rectangular. (3) N solution: The composition is 40 parts CH3COOH, 10 parts 35%H2O2, one part 36%HCl, and 20 ∼ 40 parts H2O. This produced two kinds of etch pits on 1010 surfaces, that is, light (rectangular) and dark (lenticular) pits corresponding probably to basal and non-basal dislocations, respectively. The addition of a small amount of FeCl3⋅6H2O, surfactants, etc. to N solution modified the shape of etch pits. (4) T solution: The composition is 10 ∼ 30 parts CH3COOH, 10 ∼ 30 parts 35%H2O2, 1 ∼ 3 parts 36%HCl, and 1000 parts H2O. This yielded etch-pits or-grooves on 0001 surfaces corresponding to non-basal dislocations.


(Received 1974/09/4)

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