Effect of Nb in (La0.5Ce0.5)64-xAl16Ni5Cu15Nbx (x=0-5) bulk metallic glasses
(1.Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China2.Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China)
Abstract: The effect of Nb in (La0.5Ce0.5)64？xAl16Ni5Cu15Nbx (x=0-5, mole fraction) bulk metallic glasses was investigated by X-ray diffractometry, differential scanning calorimetry, and scanning electron microscopy. Fully amorphous rods up to 5 mm in diameter were obtained using copper mold. Their lower glass transition temperatures are of about 401？407 K and wide supercooled liquid regions are up to 75 K. The oxidation resistance of the LaCe-based glassy alloys can be largely enhanced by adding tiny Nb, which makes the developed LaCe-based bulk metallic glasses more attractive for potential industrial applications.
Key words: La0.5Ce0.5)64AlNi5Cu15-Nb; bulk metallic glasses; oxidation resistance; casting