Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1998-03-02
2000-06-06
Mai, Ngoclan
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75245, 419 33, 419 48, C22C 3302
Patent
active
060713232
ABSTRACT:
An alloy target comprises at least one rare earth metal element Tb, Dy, Gd, Sm, Nd, Ho, Tm, and Er with a substantial balance of a transition metal element such as Fe, Co and Ni, and has a substantially homogeneous sintered structure and a permeability of 3 or lower. The alloy target is fabricated by a process comprising steps of melting in a high-frequency furnace or crucible furnace, quenching, pulverization, and firing under pressure. After the alloy target has been used up, it is regenerated by mixing alloy powders (to be regenerated) obtained by the mechanical pulverization of the used-up target with the alloy powders obtained at the pulverization step of the aforesaid process to obtain a mixture, and firing the mixture under pressure.
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Lasker, Esq. R. J.
Mai Ngoclan
TDKCorporation
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