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Murakami's etchant - Ni-Cu alloys and superalloys - Chemical etching

Material Name: Ni-Cu alloys and superalloys
Recipe No.: 10779
Primary Chemical Element in Material: Ni
Sample Type: Bulk
Uses: General microstructure
Etchant Name: Murakami's etchant
Type (Macro/Micro): Micro
Etching Method: Chemical
Etchant (Electrolyte) Composition: 10 g K3Fe(CN)6, 10 g KOH, 100 ml distilled water.
Procedure (Condition): Darkens alpha^' and sigma, use ta 75 C.
Note: Murakami's etch for Ni-Cu alloys and superalloys.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 663.