An adiabatic calorimeter was used to measure heat capacities and heats of transformation for alloys of iron with nickel, silicon, and vanadium. Estimates of the entropy associated with magnetic disorder suggest that ∼75% of the entropy associated with complete magnetic disorder is achieved by the time the Curie temperature is reached. Heats of transformation, corrected to the transformation temperature of pure iron, correlate well with the difference between the Curie temperature and 1184 K, suggesting that in some alloys a significant amount of magnetic order remains at the α→γ transition.
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References
1.
ARGENTB. B., BLOOMFIELDP. E., MOORER. H., and ROBINSOND.: Faraday Symp.No. 8, 1973, ‘High-Temperature Studies in Chemistry,’ p. 131. 1975: London (Chemical Soc.).
2.
NORMANTONA. S., BLOOMFIELDP. E., SALEF. R., and ARGENTB. B.: Metal Sci., 1975, 9, 510.
3.
NORMANTONA. S.: Ref. 1, p. 52.
4.
NORMANTONA. S., MOORER. H., and ARGENTB. B.: Metal Sci., this vol., p. 207.
5.
OREHOTSKYJ. and SCHRODERK.: Physica Status Solidi (a), 1973, 19, 93.
6.
PEPPERHOFFW. and ETTWIGH. H.: Z. angew. Physik, 1967, 22, 496.
7.
RAPSONR. L.: Thesis1965, Air Force Institute of Technology, Wright Patterson A.F.B., quoted by R. Hultgren, R. L. Orr, P. D. Anderson, and K. K. Kelly: ‘Selected Values of Thermodynamic Properties of Metals and Alloys’. 1963 (and supplements): New York (Wiley).
8.
SCHEILE. and SAFTIGE.: Arch. Eisenhiittenwesen, 1960, 31, 623.
9.
KOSTERW. and GODECKEW.: Z. Metallkunde, 1968, 59, 602.
10.
SALEF. R. and NORMANTONA. S.: Metallurgical Chemistry Symposium, N.P.L., 1971, p. 19. 1972: London (HMSO).
11.
NORMANTONA. S.: Metal Sci., 1975, 9, 455.
12.
SALEF. R.: J. Physics E (Sci. Instruments), 1970, 3, 646.
13.
SMITHG. R. and SALEF. R.: ibid., 1971,4, 366.
14.
FALLOTM.: Ann. Physique, 1936,6, 305.
15.
ZENERC.: Trans. AIME, 1955, 203, 619.
16.
HANSENM. and ANDERKOK.: ‘Constitution of Binary Alloys,’ second edn. 1958: London and New York (McGraw-Hill).
17.
ELLIOTR. P.: ibid., first supplement. 1965: London and New York (McGraw-Hill).
18.
SHUNKF. A.: ibid., second supplement. 1969: London and New York (McGraw-Hill).
19.
OWENE. A. and LIUY. H.: J. Iron Steel Inst., 1949, 163, 132.
20.
GOLDSTEINJ. I. and OGILVIER. E.: Trans. AIME, 1965, 233, 2083.
21.
PESCHARDM.: Rev. Mét., 1925, 22,490, 581.
22.
CRANGLEJ.: Brit. J. Appl. Phys., 1954, 5, 151.
23.
BAERH. G. and GANZD.: Z. Metallkunde, 1963, 54, 240.
24.
FISCHERW. A., LORENZK., FABRITIUSH., HOFFMANNA., and KALIVAG.: Arch. Eisenhattenwesen, 1966, 37, 79.
25.
UBELACKERE.: Compt. rend., 1965, 261, (7), 976.
26.
GLASERF. W. and IVANICKW.: Trans. AIME, 1956, 208, 1290.
27.
KIRCHNERG. and HARVIGH.: private communication.
28.
LUCASW. R. and FISHELW. P.: Trans. A SM, 1954, 46, 277.
29.
EDLUNDD. L.: PhD Thesis, Mass. Inst. Tech., 1934 (reported by S. Arajs, R. V. Colvin, H. Chessin, and J. M. Peck: J. Appl. Phys., 1962, 33, 1353).
30.
NEVITTM. V. and ALDREDA. T.: J. Appl. Phys., 1963, 34, 463.
