Title:
優れた磁気熱量特性を有するFe-Si-La合金
Document Type and Number:
Japanese Patent JP5457366
Kind Code:
B2
Abstract:
Iron-silicon-lanthanum alloy (I) is claimed. Iron-silicon-lanthanum alloy of formula ((La 1 - a-M m aTR a 1) 1[(Fe 1 - b - b 1CobM b 1) 1 - x(Si 1 - cX c) x] 1 3(C dN eH 1 - d - e) y(R) z(l) f) (I) is claimed. M m : lanthanum (22-26 wt.%), cerium (17-20 wt.%), neodymium (5-7 wt.%) or praseodymium (5-7 wt.%), where the mixture comprises up to 1 wt.% of impurities; TR : one or more rare earth family elements other than lanthanum; M : one or more d-transition elements of layers 3d, 4d and 5d; X : metalloid element comprising Ge, Al, B, Ga or Ln; R : Al, Ca, Mg, K or Na; l : two elements comprising O or S; a : 0-0.5; a1 : 0-0.2; b : 0-0.2; b1 : 0-0.4; c : 0-0.5; d : 0-1; e : 0-1; f : = 0.1; x : 0.09-0.13; y : 0.002-4; and z : 0.00005-0.1. Where indexes b, d, e, x and y are such that the alloy satisfying the relation of (6.143b(13(1-x))+4.437y[1-0.0614(d+e)]>= 1). Independent claims are included for: (1) powder of the alloy having average granulometry of less than 1000 mu m, preferably less than 500 mu m, comprising at least two different alloys (A 1and A 2) having transition temperatures (Ttr 1, Ttr 2) and peak widths at mid-height (delta T(LMH1), delta T(LMH2)) and their curves with respect to their magnetic entropy variation (delta S m 1(T) and delta S m 2(T)) depends on their respective work ranges of (Ttr 1-delta T(LMH1), Ttr 1+delta T(LMH1)) and (Ttr 2-delta T(LMH2), Ttr 2+delta T(LMH2)) coinciding with each other; (2) manufacturing the alloy powder comprising developing a precursor of the alloy of which at least one of the carbon, nitrogen and/or hydrogen content is less than that of the final alloy (where y is 0), atomizing the molten form, without prior solidification to obtain a powder particles, casting and solidifying in the form of ingot, tape, thread or powder particles by solution annealing, optionally a slag or vacuum remelting, fragmenting the ingot into a powder particle, homogenization heat treatment in air or in protective gas on the alloy before or shortly after its fractioning, and carrying out a diffusion treatment on the tape, thread or powder of at least one of elements comprising carbon, hydrogen and nitrogen, to obtain an alloy powder having the targeted final composition; and (3) a precursor material.
Inventors:
Wezkel, Terry
Fress, Elbe
Bali, Mohamed
Dou Lango, Patricia
Furshall, Daniel
Genie, Damien
Miragria, salvatore
Losca, Mariana
Alteigas Araba, Miguel Jose
Fress, Elbe
Bali, Mohamed
Dou Lango, Patricia
Furshall, Daniel
Genie, Damien
Miragria, salvatore
Losca, Mariana
Alteigas Araba, Miguel Jose
Application Number:
JP2010537490A
Publication Date:
April 02, 2014
Filing Date:
December 15, 2008
Export Citation:
Assignee:
ArcelorMittal-Stainless Steel and Nickel Alloy
International Classes:
C22C38/00; B22F1/00; B22F9/04; C21D6/00
Domestic Patent References:
| JP2003096547A | ||||
| JP2006283074A | ||||
| JP2005113209A | ||||
| JP2005015911A |
Foreign References:
| WO2006107042A1 |
Attorney, Agent or Firm:
Kawaguchi International Patent Office