https://iopscience.iop.org/article/10.1088/1468-6996/10/5/053001/pdf

Electric current activated/assisted sintering (ECAS): a review of patents 1906–2008

Disclosed are nickel-based amorphous alloy compositions, and particularly quaternary nickel-based amorphous alloy compositions containing nickel, zirconium and titanium as main constituent elements and additive Si or P, the quaternary nickel-zirconium-titanium-silicon alloy compositions comprising nickel in the range of 45 to 63 atomic %, zirconium plus titanium in the range of 32 to 48 atomic % and silicon in the range of 1 to 11 atomic %, and being represented by the general formula: Ni a (Zr 1−x Ti x ) b Si c . Also, at least one kind of element selected from the group consisting of V, Cr, Mn, Cu, Co, W, Sn, Mo, Y, C, B, P, Al can be added to the alloy compositions in the range of content of 2 to 15 atomic %. The quaternary nickel-zirconium-titanium-phosphorus alloy compositions comprising nickel in the range of 50 to 62 atomic %, zirconium plus titanium in the range of 33 to 46 atomic % and phosphorus in the range of 3 to 8 atomic %, and being represented by the general formula: Ni d (Zr 1−y Ti y ) e P f . The nickel-based amorphous alloy compositions have a superior amorphous phase-forming ability to produce the bulk amorphous alloy having a thickness of 1 mm by general casting methods.

Nickel-based amorphous alloy compositions

A method and system for plating CoNiFe is disclosed. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone and plating the CoNiFe film on a substrate in the plating solution. The plating solution is configured to provide a CoNiFe film having a high saturation magnetic flux density and having a composition of 50-70 weight percent of Fe and 3-8 weight percent of Ni. In another aspect, the method and system include plating at least a portion of a first and/or second pole of a write head using the plating solution including hydroxymethyl-p-tolylsulfone and configured to plate the CoNiFe film having a high saturation magnetic flux density and a composition of 50-70 weight percent of Fe and 3-8 weight percent of Ni.

Magnetic recording head with high saturation magnetic flux density CoNiFe thin film composition

A method and system plates CoFeX, where X is an insertion metal. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone (HPT). The plating solution being configured to provide a CoFeX film having a high saturation magnetic flux density of greater than 2.3 Tesla and not more than 3 weight percent of X. The method and system also include plating the CoFeX film on a substrate in the plating solution. In some aspects, the plated CoFeX film may be used in structures such as main poles of a magnetic recording head.

Method and system for providing high magnetic flux saturation CoFe films

A family of iron-based, phosphor-containing bulk metallic glasses having excellent processibility and toughness, methods for forming such alloys, and processes for manufacturing articles therefrom are provided. The inventive iron-based alloy is based on the observation that by very tightly controlling the composition of the metalloid moiety of the Fe-based, P-containing bulk metallic glass alloys it is possible to obtain highly processable alloys with surprisingly low shear modulus and high toughness.

Tough iron-based bulk metallic glass alloys

A magnetic powder core comprises a molded article of a mixture of a glassy alloy powder and an insulating material. The glassy alloy comprises Fe and at least one element selected from Al, P, C, Si, and B, and has a texture primarily composed of an amorphous phase. The glassy alloy exhibits a temperature difference ΔTx, which is represented by the equation ΔTx=Tx−Tg, of at least 20 K in a supercooled liquid, wherein Tx indicates the crystallization temperature and Tg indicates the glass transition temperature. The magnetic core precursor is produced mixing the glassy alloy powder with the insulating material, compacting the mixture to form a magnetic core precursor, and annealing the magnetic core precursor at a temperature in the range between (Tg−170) K and Tg K to relieve the internal stress of the magnetic core precursor. The glassy alloy exhibits low coercive force and low core loss.

Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same

A magneto-impedance element, showing a change in impedance in response to an external magnetic field when an alternating current is applied, is composed of a glassy alloy. The glassy alloy is composed of at least one base metal selected from the group consisting of Fe, Co and Ni; at least one additional metal selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti and V; and B. The glassy alloy has a temperature region ΔTx of the supercooling liquid zone of 20 °C or more which is represented by the equation ΔTx = Tx-Tg wherein Tx is the crystallization temperature and Tg is the glass transition temperature. A magnetic head, a thin film magnetic head, an azimuth sensor and an autocanceler are provided with the MI element.

Magneto-impedance element, and magnetic head, thin film magnetic head, azimuth sensor and autocanceler using the same

The present invention relates to a sinter and a casting comprising a high-hardness glassy alloy containing at least Fe and at least a metalloid element and having a temperature interval ΔTx of a supercooled liquid as expressed by ΔTx=Tx−Tg (where, Tx is a crystallization temperature and Tg is a glass transition temperature) of at least 20° C., which permit easy achievement of a complicated concave/convex shape.

Sinter and casting comprising Fe-based high-hardness glassy alloy

PROBLEM TO BE SOLVED: To provide a technology by which the degree of compaction can be improved and the properties required of a compacted magnetic core can be improved by carrying out compaction by the use of flat alloy powder and spherical alloy powder. SOLUTION: At least the flat alloy powder having a structure containing, as a principal phase, an amorphous phase in which the temperature interval ΔTx of supercooled liquid represented by equation ΔTx=Tx-Tg (wherein, Tx is initial crystallization temperature; and Tg is glass transition temperature) is >=20 K is mixed with the spherical alloy powder having a structure containing, as a principal phase, an amorphous phase in which the above temperature interval ΔTx is >=20 K, and the resultant powder mixture is compacted.

Amorphous soft magnetic alloy compact, and dust core using it

PROBLEM TO BE SOLVED: To provide a method for manufacturing a coil charge green molded body which has the small number of steps, is reducible in a manufacturing cost, and can enhance a production yield. SOLUTION: Legs 50b1, 50b2 of a spiral structural body 50 which includes a spiral part 50a and the legs 50b1, 50b2 extending from the spiral part 50a to a sideward direction are bent downward the spiral part 50a, to form a coil 3 having first terminal parts 4a, 4b. Thereafter, the coil 3 is placed in a molding mold 31a, and at this time, outside faces 4a1, 4b1 of the first terminals 4a, 4b of the coil 3 are abutted on the inside face 31a1 of the molding mold 31a. Thereafter, the molding mold 31a is filled with magnetic metal powder, and the coil 3 is filled with the magnetic metal powder. Thereafter, the metal powder is subjected to compression molding. COPYRIGHT: (C)2006,JPO&NCIPI

Mizushima Takao

Papers

Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same

Magneto-impedance element, and magnetic head, thin film magnetic head, azimuth sensor and autocanceler using the same

Sinter and casting comprising Fe-based high-hardness glassy alloy

Amorphous soft magnetic alloy compact, and dust core using it

Method for manufacturing coil charge green molded body