VIBRATIONAL ENTROPY OF ORDERED AND DISORDERED NI3AL

被引：116

作者：

ANTHONY, L

OKAMOTO, JK

FULTZ, B

机构：

[1] Division of Engineering and Applied Science, Mail 138-78, California Institute of Technology, Pasadena

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.70.1128

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the difference in vibrational entropy of Ni3Al in two states of chemical order: as a disordered fcc solid solution, and as the equilibrium L l2 ordered structure. Data were obtained from three independent methods: low-temperature calorimetry, temperature-dependent x-ray diffractometry, and temperature-dependent extended electron energy-loss fine structure spectrometry. We estimate that at high temperatures, the vibrational entropy of chemically disordered Ni3Al is 0.3k(B)/atom greater than for ordered Ni3Al.

引用

收藏

页码：1128 / 1130

页数：3

相关论文

共 21 条

[1]

[Anonymous], 1991, ORDER PHASE STABILIT

[2] NUMERICAL-CALCULATIONS OF THE CHANGE OF THE VIBRATIONAL ENTROPY DUE TO DISORDERING OF A ONE-DIMENSIONAL AND TWO-DIMENSIONAL ORDERED BINARY ALLOY [J].

BAKKER, H .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1982, 45 (01) :213-219

[3] EXTENSION OF THE ISING-MODEL FOR CALCULATIONS ON ORDER-DISORDER PHENOMENA IN ALLOYS BY ALLOWING FOR ATOMIC VIBRATIONS [J].

BAKKER, H ;

TUIJN, C .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (28) :5585-5589

[4] TEMPERATURE AND POLARIZATION DEPENDENCE OF EXTENDED X-RAY ABSORPTION FINE-STRUCTURE SPECTRA [J].

BENI, G ;

PLATZMAN, PM .

PHYSICAL REVIEW B, 1976, 14 (04) :1514-1518

[5] THE INFLUENCE OF LATTICE VIBRATIONS ON THE ORDER-DISORDER TRANSITIONS OF ALLOYS [J].

BOOTH, C ;

ROWLINSON, JS .

TRANSACTIONS OF THE FARADAY SOCIETY, 1955, 51 (04) :463-467

[6] THE DEBYE TEMPERATURE OF AUCU3 AS A FUNCTION OF LONG-RANGE ORDER PARAMETER [J].

BOWEN, DB .

ACTA METALLURGICA, 1954, 2 (04) :573-575

[7] THE ORDER-DISORDER TRANSFORMATION IN NI3AL AND NI3AL-FE ALLOYS .1. DETERMINATION OF THE TRANSITION-TEMPERATURES AND THEIR RELATION TO DUCTILITY [J].

CAHN, RW ;

SIEMERS, PA ;

GEIGER, JE ;

BARDHAN, P .

ACTA METALLURGICA, 1987, 35 (11) :2737-2751

[8] CALCULATION OF ENTROPIES OF SOLUTE ATOMS FROM SOLID SOLUBILITIES [J].

FREEDMAN, JF ;

NOWICK, AS .

ACTA METALLURGICA, 1958, 6 (03) :176-183

[9] CHEMICALLY DISORDERED NI3AL SYNTHESIZED BY HIGH-VACUUM EVAPORATION [J].

HARRIS, SR ;

PEARSON, DH ;

GARLAND, CM ;

FULTZ, B .

JOURNAL OF MATERIALS RESEARCH, 1991, 6 (10) :2019-2024

[10] ELASTIC STIFFNESS COEFFICIENTS OF IRON-ALUMINUM ALLOYS .I. EXPERIMENTAL RESULTS AND THERMODYNAMIC ANALYSIS [J].

LEAMY, HJ ;

GIBSON, ED ;

KAYSER, FX .

ACTA METALLURGICA, 1967, 15 (12) :1827-&