A STRUCTURAL AND CALORIMETRIC STUDY OF THE TRANSFORMATIONS IN SPUTTERED AL-MN AND AL-MN-SI FILMS

被引:22
作者
CHEN, LC
SPAEPEN, F
ROBERTSON, JL
MOSS, SC
HIRAGA, K
机构
[1] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204
[2] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1990.1871
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Scanning and isothermal calorimetry, together with x-ray diffraction and high resolution transmission electron microscopy (TEM), have been used to characterize Al-Mn and Al-Mn-Si films sputtered onto substrates at 60 °C, 45 °C, and −100 °C. In the case of Al0.83Mn0.17; the monotonically decreasing isothermal calorimetric signal, characteristic of a grain growth process, has proved decisive in identifying the as-sputtered “amorphous” state as microquasicrystalline, with an average grain size of ∼20 Å, in agreement with an estimate of correlation range from the x-ray pattern. The TEM at 400 keV reveals well-defined atomic or lattice images in annealed films but only barely resolved grains (ordered clusters) in the as-sputtered films. The relation between the metallic glass and the microquasicrystalline state in these alloys is discussed. © 1990, Materials Research Society. All rights reserved.
引用
收藏
页码:1871 / 1879
页数:9
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