Ti Microalloying Effect on Corrosion Resistance and Thermal Stability of Cu45Zr48Al7 Bulk Metallic Glass

Xiao Hong Yang; Xi Peng Nie; Jian Zhong Jiang

doi:10.4028/www.scientific.net/AMR.490-495.3868

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Ti Microalloying Effect on Corrosion Resistance and Thermal Stability of Cu₄₅Zr₄₈A_l7 Bulk Metallic Glass
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Ti Microalloying Effect on Corrosion Resistance and Thermal Stability of Cu₄₅Zr₄₈A_l7 Bulk Metallic Glass

Abstract:

Bulk metallic glasses (BMGs) of Cu45Zr48-xAl7Tix with x= 0, 1.5, and 3 at.% were prepared by copper mould casting. The corrosion resistance of the BMGs with different Ti contents was examined by potentiodynamic polarization tests and weight loss measurements in 1 N NaOH, 1 N H2SO4, 1 N H2SO4 + 0.01 N NaCl and 0.5 N NaCl solutions, respectively. The newly-developed BMGs’ corrosion resistance in Cl-- or both H+ and Cl--ions containing solutions can be greatly enhanced. The influence of Ti addition on glass forming ability (GFA) and thermal stability was investigated by x-ray diffraction and differential scanning calorimetry in detail. The alloy containing 1.5 at.% Ti exhibits the largest GFA, the critical size comes up to 10 mm in diameter.