Alliedsignal Inc.

V R Ramanan

Carl H Smith

Howard Horst Liebermann

Jerry C LaSalle

David J Skinner

A rapidly solidified amorphous metallic alloy is composed of iron, boron, silicon and carbon. The alloy exhibits in combination high saturation induction, high Curie temperature, high crystallization temperature, low core loss and low exciting power at line frequencies and is particularly suited for use in cores of transformers for an electrical power distribution network.

Amorphous Fe-B-Si-C alloys having soft magnetic characteristics useful

This invention is directed to metallic alloy consisting essentially of iron, boron and silicon and having a composition in the region A, B, C, D, E, F, A of FIG. 1, said alloy having a crystallization temperature of at least about 490.degree. C., a saturation magnetization value of at least about 174 emu/g at 25.degree. C., a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at about 380.degree. C. for a time ranging from about 1000 to about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 380.degree. C. for about 1000 seconds, a fracture strain of at least about 0.03, measured at 25.degree. C. for the alloy after having been annealed at about 360.degree. C. for about 1.5 hours, and a fracture strain of at least about 0.03, measured at 25.degree. C. for the alloy after having been annealed at about 380.degree. C. for about 1.5 hours. The alloys exhibit improved utility and handleability in the production of magnetic cores used in the manufacture of electric distribution and power transformers.

Amorphous Fe-B-Si alloys exhibiting enhanced AC magnetic properties and

A magnetic metallic glass alloy exhibits, in combination, high saturation induction and low magnetic anisotropy energy. The alloy has a composition described by the formula Fe.sub.a Co.sub.b B.sub.c Si.sub.d C.sub.e, where 'a'-'e' are in atom percent, 'a' ranges from about 72 to about 84, 'b' ranges from about 2 to about 8, 'c' ranges from about 11 to about 16, 'd' ranges from about 1 to about 4, and 'e' is zero or ranges from about 3 to about 4, with up to about 1 atom percent of Mn being optionally present in the alloy, with the provisos that (i) when 'e' is zero and 'a' is greater than or equal to 80, 'b' cannot exceed 4, (ii) when 'e' is zero and 'a' is less than 80 by an amount x, 'b' cannot exceed (4+4x) and, (iii) the sum ('a'+'b'+'c'+'d'+'e') equals 100. Such an alloy is especially suited for use in large magnetic cores associated with pulse power applications requiring high magnetization rates. Examples of such applications include high power pulse sources for linear induction particle accelerators, induction modules for coupling energy from the pulse source to the beam of these accelerators, magnetic switches in power generators in inertial confinement fusion research, magnetic modulators for driving excimer lasers, and the like.

Iron rich metallic glasses having high saturation induction and superior

A magnetic metallic glass alloy exhibits, in combination, high saturation induction and low magnetic anisotropy energy. The alloy has a composition described by the formula Fe.sub.a Co.sub.b B.sub.c Si.sub.d C.sub.e, where 'a'-'e' are in atom percent, 'a' ranges from about 72 to about 84, 'b' ranges from about 2 to about 8, 'c' ranges from about 11 to about 16, 'd' ranges from about 1 to about 4, and 'e' ranges from 0 to about 4, with up to about 1 atom percent of Mn being optionally present. Such an alloy is especially suited for use in large magnetic cores associated with pulse power applications requiring high magnetization rates. Examples of such applications include high power pulse sources for linear induction particle accelerators, induction modules for coupling energy from the pulse source to the beam of these accelerators, magnetic switches in power generators in inertial confinement fusion research, magnetic modulators for driving excimer lasers, and the like.

A component consolidated from a rapidly solidified aluminum-lithium alloy containing copper, magnesium and zirconium is subjected to a preliminary aging treatment at a temperature of about 400.degree. C. to 500.degree. C. for a time period of about 0.5 to 10 hours; quenched in a fluid bath; and subjected to a final aging treatment at a temperature of about 100.degree. C. to 250.degree. C. for a time period ranging up to about 40 hours. The component exhibits increased strength and elongation, and is especially suited for use in lightweight structural parts for land vehicles and aerospace applications.

Strength enhancement of rapidly solidified aluminum-lithium through

A magnetic metallic glass alloy exhibits, in combination, high saturation induction and high Curie temperature. The alloy has a composition described by the formula Fe.sub.a Co.sub.b Ni.sub.c B.sub.d Si.sub.e C.sub.f, where 'a'-'f' are in atom percent, 'a' ranges from about 75 to about 81, 'b' ranges from 0 to about 6, 'c' ranges from about 2 to about 6, 'd' ranges from about 11 to about 16, 'e' ranges from 0 to about 4, and 'f' ranges from 0 to about 4, with the provisos that (i) the sum of 'b' and 'c' may not be greater than about 8, (ii) 'd' may not be greater than about 14 when 'b' is zero (iii) 'e' may be zero only when 'b' is greater than zero, and (iv) 'f' is zero when 'e' is zero. This alloy is suitable for use in large magnetic cores used in various applications requiring high magnetization rates, and in the cores of line frequency power distribution transformers, airborne transformers, current transformers, ground fault interrupters, switch-mode power supplies, and the like.

Iron-rich metallic glasses having high saturation induction and superior

Iron rich metallic glasses having saturation induction and superior soft

A magnetic metallic glass alloy exhibits, in combination, high saturation induction and high Curie temperature. The alloy has a composition described by the formula Fe.sub.a Co.sub.b Ni.sub.c B.sub.d Si.sub.e C.sub.f, where 'a'- 'f' are in atom percent, 'a' ranges from about 75 to about 81, 'b' ranges from 0 to about 6, 'c' ranges from about 2 to about 6, 'd' ranges from about 11 to about 16, 'e' ranges from 0 to about 4, and 'f' ranges from 0 to about 4, with the provisos that (i) the sum of 'b' and 'c' may not be greater than about 8, (ii) 'd' may not be greater than about 14 when 'b' is zero, (iii) 'e' may be zero only when 'b' is greater than zero, and (iv) 'f' is zero when 'e' is zero. This alloy is suitable for use in large magnetic cores used in various applications requiring high magnetization rates, and in the cores of line frequency power distribution transformers, airborne transformers, current transsformers, ground fault interrupters, switch-mode power supplies, and the like.

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V R Ramanan