采用真空铜模吸铸和单辊真空薄带技术制备出直径5 mm的Zr47Ti12.9Cu1 1Ni9.6Be16.7Nb2.8金属玻璃棒材和相同成分厚30 μm的金属玻璃薄带.利用热分析技术和Kissinger方法分析计算了不同尺寸金属玻璃的热稳定性参数,主要包括:玻璃转变温度Tg,晶化温度Tx,玻璃转变和晶化激活能Eg、Ex等.结果表明:Zr47Ti12.9Cu11Ni9.6Be16.7Nb2.8金属玻璃在热稳定性上表现出“越小越稳定”的特征,薄带的热稳定性参数均高于棒材,表现出更好的热稳定性.不同尺寸Zr47Ti12.9Cu11Ni9.6Be 16.7Nb2.8金属玻璃的晶化行为进一步验证了这一特征:在晶化温度远低于金属玻璃薄带情况下,棒材却更易晶化,晶化过程中获得了比金属玻璃薄带更加完整的晶化组织.
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