Фазовая диаграмма системы Co-P
К оглавлению: Другие диаграммы (Others phase diargams)
Co-P (Cobalt-Phosphorus)
K. Ishida and T. Nishizawa
The assessed phase diagram for the Co-P system is based primarily on [09Zem],
with review of the data of [38Has] and [60Run]. The equilibrium phases are (1)
the liquid, L; (2) the Co-rich fcc terminal solid solution, (aCo), with
negligible solid solubility of P; (3) the Co-rich cph terminal solid solution,
(eCo), stable up to 422 C; (4) the orthorhombic phase, Co2P, with an extended
homogeneity range at higher temperatures, stable up to the congruent melting
temperature of 1386 C; (5) the orthorhombic intermediate compound, CoP, with
a melting temperature greater than 1000 C; (6) the monoclinic compound, CoP2;
and (7) the cubic intermediate phase, CoP3.
[67Kan] studied the phase changes in a Co-10.5% P alloy obtained by
electrolytic deposition. The main phase as deposited was (aCo); it decomposed
into (aCo) and Co2P during heat treatment. The specimens of Co-(4 to 24) at.%
P prepared by electrodeposition were a mixture of (aCo) and (eCo) [68Kan]. An
electron diffraction study of the amorphous thin films produced by electroless
deposition showed that the nearest-neighbor distance is slightly larger than
that observed in the crystalline state [71Dav]. The microstructure of
amorphous films was studied by electron microscopy [84Son, 85Bes] and X-ray
diffraction [79Chi, 84Son]. The average distance of Co-Co increases with
increasing P content [79Chi]. [74Che] and [78Che] investigated phase
transitions from the amorphous to the crystalline state. The structure of
amorphous Co-P alloys was reviewed by [76Car].
The Curie temperature of (aCo) was found to decrease when P was added [38Has].
The magnetic moment of Co in the mixture of (aCo) and (eCo) solid solutions
produced by the electrodeposition method decreased nearly proportionally to P.
[78Don] confirmed that the CoP2 compound is a diamagnetic semiconductor.
The magnetic properties of amorphous Co-P alloys have been studied by [74Car],
[78Die1], and [78Die2]. Electrodeposited amorphous alloys have a high
permeability [78Die1]. The magnetic anisotropy observed in the Co-P amorphous
alloy and the microstructural features were discussed by [78Die2], [84Son],
and [85Bes]. The magnetic properties of stable and metastable phases are
summarized in the complete evaluation.
09Zem: S. Zemczuzny and J. Schepelew, Z. Anorg. Allg. Chem., 64, 245-257 (1909)
in German.
38Has: U. Haschimoto, J. Jpn. Inst. Met., 2, 67-77 (1938) in Japanese.
47Now: H. Nowotny, Z. Anorg. Allg. Chem., 254, 31-36 (1947) in German.
60Run: S. Rundqvist, Acta Chem. Scand., 14, 1961-1979 (1960).
62Run: S. Rundqvist, Acta Chem. Scand., 16, 287-292 (1962).
67Kan: T. Kanbe, K. Nemoto, H. Mitani, and K. Shoji, Kinzoku Hyomen Gijutsu,
18, 142-145 (1967) in Japanese.
68Kan: T. Kanbe and K. Kanematsu, J. Phys. Soc. Jpn., 24, 1396 (1968).
68Mun: R.A. Munson and J.S. Kasper, Inorg. Chem., 7, 390-391 (1968).
71Dav: L.B. Davies and P.J. Grundy, Phys. Status Solidi (a), 8, 189-197 (1971).
72Don: P.C. Donohue, Mater. Res. Bull., 7, 943-948 (1972).
73Sel: K. Selte and A. Kjekshus, Acta Chem. Scand., 27, 3195-3206 (1973).
74Car: G.S. Cargill III and R.W. Cochran, J. Phys. (Paris), 35, C4, 269-278 (
1974).
74Che: L.A. Chekanova, R.S. Iskhakov, G.I. Fish, R.G. Khlebopros, and N.S.
Chistyakov, Zh. Eksp. Teor. Fiz. Pis'ma, 20, 73-76 (1974) in Russian; TR: JETP
Lett., 20(2), 31-32 (1974).
76Car: G.S. Cargill III, Rapidly Quenched Metals, Massachusetts Institute of
Technology, Cambridge, 293-321 (1976).
77Ack: J. Ackermann and A. Wold, J. Phys. Chem. Solids, 38, 1013-1016 (1977).
78Che: L.A. Chekanova, R.S. Iskhakov, R.G. Khlebopros, N.S Chistyakov, and G.I.
Fish, Fiz. Tverd. Tela, 20, 3501-3503 (1978) in Russian; TR: Sov. Phys. Solid
State, 20, 2026-2027 (1978).
78Die1: G. Dietz and K. Klett, J. Magn. Magn. Mater., 8, 57-60 (1978).
78Die2: G. Dietz, H. Bestgen, and J. Hungenberg, J. Magn. Magn. Mater., 9, 208-
210 (1978).
79Chi: G.C. Chi and G.S. Cargill III, J. Appl. Phys., 50, 2713-2720 (1979).
83Nis: T. Nishizawa and K. Ishida, Bull. Alloy Phase Diagrams, 4(4), 387-390 (
1983).
84Son: R. Sonnberger, H. Bestgen, and G. Dietz, Z. Phys. B, 56, 289-295 (1984).
85Bes: H. Bestgen, Rapidly Quenched Metals, Vol. 1, Elsevier, 443-446 (1985).
Submitted to the APD Program. Complete evaluation contains 1 figure, 4 tables,
and 26 references.
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