J. Mater. Sci. Technol. ›› 2012, Vol. 28 ›› Issue (12): 1102-1108.

• Mechanical and Functional Properties of Materials • Previous Articles     Next Articles

Effect of Compression on the Crystallization Behavior and Corrosion Resistance of Al86Ni9La5 Amorphous Alloy

Yan Liu1,2), Weimin Wang1), Hongdi Zhang1), Haijian Ma1), Bang An1)   

  1. 1) Key Laboratory for Liquid-solid Structural Evolution and Processing of Materials, Shandong University, Jinan 250061, China
    2) Department of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China
  • Received:2011-12-09 Revised:2012-03-27 Online:2012-11-12 Published:2012-11-23
  • Supported by:

    the National BaSiC Research Program of China (“973 Program", No. 2012CB825702), the National Natural Science Foundation of China (Nos. 50871061 and 51171091), the Shandong Excellent Youth Award Foundation, China (No. 2008BS04020) and the Excellent Youth Project of Shandong Natural Science Foundation, China (No. JQ201012).

Abstract:

The effect of compression on the crystallization behavior and corrosion resistance of Al86Ni9La5 amorphous ribbons was investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and electrochemistry test. The XRD and TEM results reveal that the compressed Al86Ni9La5 ribbons spun with the circumferential speed (R) of 29.3 m/s are in fully amorphous state; however, the compressed ribbons spun with R=14.7 m/s have crystalline phases embedded in the amorphous matrix. The SEM images indicate that after compression, the toughness of the ribbons increases. Electrochemical results show that the compression decreases the stability of the passive film of the Al86Ni9La5 amorphous ribbons, because of the compression-introduced free volume, shear bands and crystalline phases; meanwhile, with R=14.7 m/s, the compression-induced crystalline phases in the Al86Ni9La5 ribbons increase the corrosion potential.

Key words: Compression, Crystallization, Corrosion resistance, Quenched-in nuclei