期刊
PHILOSOPHICAL MAGAZINE LETTERS
卷 88, 期 11, 页码 813-819出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500830802385274
关键词
electromagnetic levitation; liquid alloys; molecular dynamic simulations; specific heat; undercooled melts
类别
资金
- National Natural Science Foundation of China [50121101, 50395105]
- NPU Doctorate Foundation [CX200420]
The accurate data of specific heat are of great significance in the thermodynamic analysis of phase transformation. Here, we report the experimental and calculated specific heat of liquid Ni90.1Si9.9 alloy by electromagnetic levitation drop calorimeter and molecular dynamics calculation, respectively. The experimental result, 39.54 J mol(-1) K-1, is in good agreement with the calculated value of 38.03 J mol(-1) K-1, and there exists only a little difference between them. The calculated undercooling range of 0 similar to 623 K is much wider than the experimental range of 0 similar to 218 K. The undercooled liquid structure of this alloy is analyzed according to the total and partial pair distribution functions, which show that the in-order degree of atom distribution enhances from normal liquid to undercooled liquid. The Si atoms are homogeneously dispersed among the Ni atoms, whereas the average distance among Ni atoms changes little.
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