Non-isothermal crystallization kinetics and mechanical properties of Al₈₆Ni₆Y_4.5Co₂La_1.5 metallic glass powder

详细信息	查看全文 | 推荐本文 |

• 作者：X.P. Li^a ; M. Yan^a ; J.Q. Wang^b ; H. Huang^a ; C. Kong^c ; G.B. Schaffer^a ; M. Qian^a ; ^{ma.qian@uq.edu.au}
• 关键词：Aluminium alloys ; Amorphous ; Crystallization kinetics ; Mechanical properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：25 July, 2012
• 卷：530
• 期：Complete
• 页码：127-131
• 文件大小：1308 K

摘要

| Figures/TablesFigures/Tables | ReferencesReferences

Abstracts

The crystallization kinetics and mechanical properties of Al₈₆Ni₆Y_4.5Co₂La_1.5 metallic glass powder have been investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and nanoindentation. The first crystallization stage of the Al₈₆Ni₆Y_4.5Co₂La_1.5 glass powder is identified to be a surface nucleation and one-dimensional growth process while the second and third crystallization stages are characterized by volume nucleation but followed by one-dimensional growth and two-dimensional growth, respectively. The hardness and elastic modulus show opposite trends on crystallization; they are both sensitive to the precipitation of fcc-Al, growth of fcc-Al and precipitation of complex intermetallic phases. The changes of hardness and elastic modulus of the Al₈₆Ni₆Y_4.5Co₂La_1.5 metallic glass powder with crystallization are discussed.