著者

Yoshitaro Nosé Ayako Kushida Teruyuki Ikeda Hideo Nakajima Katsushi Tanaka Hiroshi Numakura

出版者

The Japan Institute of Metals and Materials

雑誌

MATERIALS TRANSACTIONS (ISSN:13459678)

巻号頁・発行日

vol.44, no.12, pp.2723-2731, 2003 (Released:2005-09-06)

参考文献数

19

被引用文献数

33 39

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The phase boundaries pertaining to γ2 (FePt) and γ3 (FePt3) phases in the Fe-Pt system have been re-examined by measuring (1) the compositions of interphase boundaries in diffusion couples, (2) the equilibrium compositions in two-phase alloys and (3) the electrical resistivity as a function of temperature. The results obtained by the three methods are consistent with each other. The γ (fcc solid solution) ↔ γ2+γ3 eutectoid has been found to be located at a point higher in Pt concentration and lower in temperature than in the currently adopted phase diagram, the stability range of the γ2 phase exhibits considerable asymmetry. Other phase boundaries, as well as the ferromagnetic ↔ paramagnetic transition in the γ2 phase detected by the resistivity measurements, are in fair agreement with the data in the literature.