Interface-generated vitrification in the Y - Mo system with a small positive heat of mixing
B X Liu; Z J Zhang; B X Liu; Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China, and National Laboratory of Solid-State Microstructure Physics, Nanjing University, Nanjing 200039, People's Republic of China; Z J Zhang; Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China, and National Laboratory of Solid-State Microstructure Physics, Nanjing University, Nanjing 200039, People's Republic of China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1996-03-11
Аннотация:
We report, in this letter, the first observation of vitrification in the Y - Mo system with positive heat of mixing, as a function of the number of interfaces or more precisely the fraction of interfacial atoms, in Y - Mo multilayered films. The thermodynamic driving force is the excess free energy originating from the interfaces, which elevates the initial energetic state of the multilayered films beyond that of the amorphous phase. In addition, the role of a large atomic size mismatch in vitrification is discussed. .
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