Local electrochemical investigation of single grains of polycrystalline Cu-16%Zn-8%Al alloy

Journal of the Brazilian Chemical Society

José T. C. Barragan²  Matildes Blanco²  Nilso Barelli²  Rodrigo Della Noce²  Cecílio S. Fugivara²  Javier Fernández¹  Assis V. Benedetti² 

[1] ,Universidade Estadual Paulista Instituto de Química Departamento de Físico-QuímicaAraraquara SP ,Brazil

关键词: Cu-Zn-Al alloys;    shape memory alloys;    single grains;    borate buffer;    microelectrochemical cell;   

DOI  :  10.1590/S0103-50532011001100013

来源: SciELO

【 摘 要 】

Local electrochemical studies of single grains of a polycrystalline Cu-16%Zn-8%Al alloy were investigated in borate buffer solution (pH 8.4) by means of microelectrochemical technique. The grain orientations, which were determined by the Laue back-reflection method, were predominantly close to [110] direction, suggesting that the sample was texturized. The open circuit potential measurements showed that the lower steady state potential was observed for the grain which has the highest number of steps on the alloy surface. The cyclic voltammetry experiments suggested that the orientation of Cu2O follows the substrate one in the Cu-Zn-Al alloy, while CuO grows independently.

【 授权许可】

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