Abstract:
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 figure 1, said alloy having a crystallization temperature of at least about 490 DEG C, a saturation magnetization value of at least about 174 emu/g at 25 DEG C, a core loss not greater than about 0.3 W/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at 360 DEG C for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at about 380 DEG 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 DEG C, 60 Hz and 1.4 T after having been annealed at 360 DEG C for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at 380 DEG C for about 1000 seconds, a fracture strain of at least about .03, measured at 25 DEG C for the alloy after having been annealed at about 360 DEG C for about 1.5 hours, and a fracture strain of at least about .03, measured at 25 DEG C for the alloy after having been annealed at about 380 DEG 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.
Abstract:
A magnetic metallic glass alloy evidencing a low rate of damping of mechanically resonant oscillations, is suitable for use in mechanically resonant target surveillance systems. The alloy has a composition described by the formula FeaNibMcBdSieCf, where M is one of molybdenum and chromium, ''a''-''f'' are in atom percent, ''a'' ranges from about 39 to about 41, ''b'' ranges from about 37 to about 39, ''c'' ranges from 0 to about 3, ''d'' ranges from about 17 to about 19, and ''e'' and ''f'' range from 0 to about 2, with the provisos that (i) only one of ''c'', ''e'', and ''f'' can be zero, (ii) ''e'' cannot be zero if ''f'' is not zero, and (iii) ''f'' can be zero only when M is Cr. A ribbon, wire or sheet of this alloy, having mechanical resonance in a range of frequencies from about 55 kHz to about 60 kHz, evidences a ring down time of at least about 3 ms.
Abstract:
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 FeaCobBcSidCe, 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.
Abstract:
A magnetic metallic glass alloy exhibits, in combination, high saturation induction and high Curie temperature. The alloy has a composition described by the formula FeaCobNicBdSieCf, where ''a''-''f'' are in atom percent, ''a'' ranges from about 75 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.
Abstract:
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 DEG C to 500 DEG 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 DEG C to 250 DEG 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.
Abstract:
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 DEG C to 500 DEG 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 DEG C to 250 DEG 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.