Alloy target used for manufacturing magneto-optical recording me

Details Alloy target used for manufacturing magneto-optical recording me Alloy target used for manufacturing magneto-optical recording me

1989-10-26

1991-02-12

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

420 83, 420435, 420455, B22F 900

Patent

active

049920952

ABSTRACT:
An alloy target used for manufacturing a magneto-optical recording medium, wherein the component and composition comprises 10-50 atom % of at least one of rare earth elements selected from the group consisting of Nd, Sm, Gd, Tb, Dy, Ho, Er and Tm, from 0.1 to 10 atom % of at least one of additive elements selected from the group consisting of B, Al, Si, P, Ti, V, Cr, Mn, Zr, Nb, Mo, Hf, Ta, W, Pt, Pb and Bi and the balance substantially composed of at least one of transition metals selected from the group consisting of Co, Fe and Ni; and a structure comprises any one of mixed structure from a group consisting of (1) a mixed structure comprising a phase of intermetallic compound of rare earth element--additive element--transition metal, and a fine mixed phase of rare earth element and intermetallic compound of rare earth element--transition metal, (2) a mixed structure comprising a phase of intermetallic compound of rare earth element--transition metal and a fine mixed phase of rare earth element and intermetallic compound of rare earth element--transition metal (at least one of the rare earth element and the intermetallic compound in the fine mixed phase contains additive element); (3) a mixed phase comprising a phase of intermetallic compound of rare earth element--transition metal and a phase of intermetallic compound of rare earth element--additive element; (4) a mixed structure comprising any one of the mixed structures (1), (2) and (3) above and a phase of rare earth element alone; and (5) a mixed structure of any one of the mixed structures comprising a phase of intermetallic compound of rare earth element--additive element--transition metal, and a phase of rare earth element alone; in which the phase of the transition metal alone is not substantially present.

REFERENCES:
patent: 4582535 (1986-04-01), Buschow
patent: 4620872 (1986-11-01), Hijikata et al.
patent: 4915737 (1990-04-01), Morimoto et al.
patent: 4915738 (1990-04-01), Morimoto et al.

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