The dezincification of α-Cu-Zn

TROIANI; PELEGRINA; AHLERS

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 1996 p. 93 - 106

1862-6300

Cu-25.4 at% Zn samples were dezincified in vacuum at 450, 500, and 800 °C, and the changes in composition and pore configuration were followed mainly by scanning electron microscopy. Samples with (100) and (111) surface orientation were used in the experiments. A smaller evaporation rate for (111) with respect to (100) surfaces could be observed. Three stages in the dezincification could be established: a) a homogeneous dezincification without pore formation in the very initial stage; b) the pore formation stage with round pores which could develop into segmented shapes, exposing preferentially (111) close packed planes; and c) the formation of irregular strings of pores, whose collapse leads to grooves at 800 °C.