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Magnetocaloric effect in Er-Al-Co bulk metallic glasses
  • ISSN号：1001-6538
  • 期刊名称：Chinese Science Bulletin
  • 时间：2011.12
  • 页码：3978-3983
  • 分类：TG139.8[金属学及工艺—合金;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构：[1]北京科技大学国家材料服役安全科学中心,北京100083, [2]北京科技大学新金属材料国家重点实验室,北京100083, [3]北京科技大学国家材料服役安全科学中心,北京100083, 北京科技大学新金属材料国家重点实验室北京100083
  • 相关基金：National Natural Science Foundation of China （51071018,51271018）
  • 相关项目：块体非晶合金原子尺度下的变形机理及动态纳米晶化过程
作者： Hui, X. D.|Xu, Z. Y.|Wu, Y.|Chen, X. H.|Liu, X. J.|Lu, Z. P.|
关键词： Zr47Ti12, 9Cu11Ni9, 6Be16, 7Nb2, 8, 金属玻璃, 热稳定性, 尺寸效应, Zr47Ti12.9Cu11Ni9.6Be16.7Nb2.8, metallic glasses, thermal stability, size effect
中文摘要：

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.

英文摘要：

The bulk glassy cylinders with a diameter of 5 mm and the ribbons of 30 μm in thickness of Zr47Ti12.9Cu11Ni9.6Be16.7Nb2.8 metallic glass were prepared by suction casting and melt spinning,respectively.The thermal stability parameters such as glass transition temperature Tg,onset crystallization temperature Tx,glass transition and crystallization activation energies Eg,Ex,etc.,were measured by Differential Scanning Calorimetry and the Kissinger equation.The results reveal that the thinner ribbon sample has higher thermal stability and the metallic glass exhibits a ＂the smaller,the more stable＂ characteristic.The crystallization behaviors of different size samples also verify the above mentioned characteristic further：in the case of the crystallization of the bulk cylinder being lower than that of the glassy ribbon,the cylinder is crystallized more easily,and its crystallization microstructure is more integral than that of the glassy ribbon.

同期刊论文项目
块体非晶合金原子尺度下的变形机理及动态纳米晶化过程
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