摘要:
A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from a side of the alloy particle. All of the first oxide layer, the second oxide layer, and the third oxide layer contain Si. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer having Fe content smaller than Si content in the alloy particle, the second oxide layer is a layer having Fe content larger than the Si content in the alloy particle, and the third oxide layer is a layer having Fe content smaller than the Si content in the alloy particle.
摘要:
A composite particle comprises a core, a shielding layer deposited on the core, and further comprises an interlayer region formed at an interface of the shielding layer and the core, the interlayer region having a reactivity less than that of the core, and the shielding layer having a reactivity less than that of the interlayer region, a metallic layer not identical to the shielding layer and deposited on the shielding layer, the metallic layer having a reactivity less than that of the core, and optionally, an adhesion metal layer deposited on the metallic layer, wherein the composite particles have a corrosion rate of about 0.1 to about 450 mg/cm2/hour using an aqueous 3 wt % KCl solution at 200° F. An article comprises composite particles, wherein has a corrosion rates of about 0.1 to about 450 mg/cm2/hour using an aqueous 3 wt % KCl solution at 200° F.
摘要:
A method for finely powdering tungsten powder, which includes dispersing tungsten powder in an aqueous solution containing an oxidizing agent to form an oxide film in the surface of the tungsten powder and removing the oxide film with an alkaline aqueous solution. Also disclosed is a method for producing fine tungsten powder, which includes obtaining tungsten powder having an average particle size of 0.05 to 0.5 μm by a process including the above method for finely powdering. Also disclosed is a tungsten powder having an average particle size of 0.05 to 0.5 μm, in which the dMS value (product of an average particle size d (μm), true density M (g/cm3) and BET specific surface area S (m2/g)) is within the range of 6±0.8.
摘要:
A method for providing a tantalum powder with a piece+block structure, comprising the following steps: 1) providing a granulous tantalum powder, and dividing same into a first part and a second part; 2) putting the first part of the tantalum powder in a ball mill for ball milling, taking the powder out after the ball milling and sieving same, and obtaining a tantalum powder in the form of a piece; 3) mixing the tantalum powder in the form of a piece and the second part of the tantalum powder to obtain a mixture, and preferably, the mixing proportion of the tantalum powder in the form of a piece and the granulous tantalum powder being 1:0.1˜1, preferably being 1:0.25˜0.8, and more preferably being 1:0.4˜0.6; and 4) performing the steps of water washing, acid washing, and nodularization on the mixture to finally obtain a tantalum powder with a piece+block structure.
摘要:
A water-atomized iron-based powder is provided that is pre-alloyed with 0.75-1.1% by weight of Ni, 0.75-1.1% by weight of Mo and up to 0.45% by weight of Mn, and further including 0.5-3.0%, preferably 0.5-2.5% and most preferably 0.5-2.0% by weight of Cu, and inevitable impurities, the balance being Fe. An alloyed iron-based powder composition including a water-atomized iron-based powder
摘要:
An iron-based soft magnetic powder for dust core having a high magnetic flux density, maintaining high electric insulation even after annealing, and more excellent in the mechanical strength in which a coating film having a phosphate conversion coating film is formed on the surface thereof and the peak height for the absorption of hydroxyl groups formed at 3700 cm−1 to 2500 cm−1 is 0.04 or more being indicated by absorbance when the coating film is analyzed by infrared diffuse reflectance spectroscopy.
摘要:
Composite materials (2, 8) disclosed herein include a metal alloy (4, 10) and a flux composition (6, 12). The metal alloy may be a superalloy, and a volume ratio of the flux composition to the metal alloy may range from about 30:70 to about 70:30. The composite materials may be in the form of particles (2) containing a core (6) surrounded by a metallic layer (4), in which the core contains the flux composition and the metallic layer contains the metal alloy. The composite materials may also be in the form of fused materials (8) in which the metal alloy (10) and the flux composition (12) are randomly distributed and randomly oriented. Also disclosed are processes involving melting of composite materials to form metal deposits (32).
摘要:
A composite particle comprises a core, a shielding layer deposited on the core, and further comprises an interlayer region formed at an interface of the shielding layer and the core, the interlayer region having a reactivity less than that of the core, and the shielding layer having a reactivity less than that of the interlayer region, a metallic layer not identical to the shielding layer and deposited on the shielding layer, the metallic layer having a reactivity less than that of the core, and optionally, an adhesion metal layer deposited on the metallic layer, wherein the composite particles have a corrosion rate of about 0.1 to about 450 mg/cm2/hour using an aqueous 3 wt % KCl solution at 200° F. An article comprises composite particles, wherein has a corrosion rates of about 0.1 to about 450 mg/cm2/hour using an aqueous 3 wt % KCl solution at 200° F.
摘要翻译:复合颗粒包括芯,沉积在芯上的屏蔽层,并且还包括形成在屏蔽层和芯的界面处的层间区域,所述层间区域具有小于芯的反应性,并且屏蔽层 具有小于层间区域的反应性的反应性,与屏蔽层不同并沉积在屏蔽层上的金属层,金属层具有小于芯的反应性的反应性,以及任选的沉积在该层上的粘附金属层 金属层,其中复合颗粒在200°F下使用3wt%KCl水溶液的腐蚀速率为约0.1至约450mg / cm 2 /小时。制品包含复合颗粒,其中腐蚀速率为约0.1至 约450mg / cm 2 /小时,使用3重量%KCl水溶液在200°F
摘要:
To provide a conductive particle, containing: a core particle; and a conductive layer formed on a surface of the core particle, wherein the core particle is a nickel particle, and wherein the conductive layer is a nickel plating layer a surface of which has a phosphorous concentration of 10% by mass or lower, and the conductive layer has an average thickness of 1 nm to 10 nm.