The present disclosure provides a coated iron particle, or reaction product of a coating and the iron particle, comprising an iron particle and a ceramic coating disposed on the iron particle. Aspects of the present disclosure provide a coated iron particle, or reaction product of a coating and the iron particle, including an iron particle having a diameter of from about 0.5 micron to about 100 microns; and a ceramic coating disposed on the iron particle. Aspects of the present disclosure further provide compositions comprising a coated iron particle and a polymer or adhesion promoter. Aspects of the present disclosure further provide components, such as components, such as vehicle components, having a surface and a composition of the present disclosure disposed on the surface.

A process and a system for producing a stock solution for production of a ferrofluid is provided. The process includes contacting an acidic solution in a reaction container filled with an excess of a bulk material containing Fe(III) and optionally Fe(II). The acid reacts with the bulk material to form the stock solution (Ls) having dissolved ferric (Fe(III)) and optionally ferrous (Fe(II)) ions which is then separated from the bulk material.

An alloy powder having an alloy composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cCr.sub.dSn.sub.eC.sub.f, wherein a, b, c, d, e and f are atomic % meeting 0.80≤a≤1.80, 2.00≤b≤10.00, 11.00≤c≤17.00, 0.10≤d≤2.00, 0.01≤e≤1.50, and 0.10≤f≤0.40.

An iron-based alloy composition including: boron (B): 1.6-2.4 wt. %; carbon (C): 2.2-3.0 wt. %; chromium (Cr): 3.5-5.0 wt. %; manganese (Mn): below 0.8 wt. %; molybdenum (Mo): 16.0-19.5 wt. %; nickel (Ni): 1.0-2.0 wt. %; silicon (Si): 0.2-2.0 wt. %; vanadium (V): 10.8-13.2 wt. %; and balanced with iron (Fe). Further, an item including a substrate portion and a hardfacing coating bonded to the substrate portion, wherein the hardfacing coating is made by an overlay welding process using the iron-based alloy composition.

Provided is a Cu-based alloy powder that is suitable for a process involving rapid melting and rapid solidification and that can provide a shaped object superior in characteristics. The powder is composed of a Cu-based alloy, which contains an element M being one or more elements selected from Cr, Fe, Ni, Zr, and Nb: 0.1% by mass or more and 10.0% by mass or less, Si: more than 0% by mass and 0.20% by mass or less, P: more than 0% by mass and 0.10% by mass or less, and S: more than 0% by mass and 0.10% by mass or less, the balance being Cu and inevitable impurities. This powder has a ratio (D50/TD) of the average particle diameter D50 (μm) thereof to the tap density TD (Mg/m.sup.3) is 0.2×10.sup.−5.Math.m.sup.4/Mg or more and 20×10.sup.−5.Math.m.sup.4/Mg or less, and has a sphericity of 0.80 or more and 0.95 or less.

A method of producing a composite material, the method including: preparing a mixed powder of diamond particles and copper powder particles; and generating a composite material containing diamond and copper from the mixed powder by pulsed electric current sintering with a pressure of 5 MPa or greater and 100 MPa or less applied to the mixed powder, and the mixed powder maintained at a temperature equal to or higher than 500° C. and lower than 800° C.

The disclosure refers to a method for preparing NdFeB magnets including at least one of Ce and La. The method includes:

S1) Separately preparing flakes of alloy R1 and flakes of alloy R2 each by a strip casting process, wherein the alloy R1 includes at least one of La and Ce, but the alloy R2 does not include La and Ce;
S2) separately subjecting the flakes of alloy R1 and R2 to a hydrogen embrittlement process followed by pulverizing the process product to alloy powders by jet milling, wherein a ratio of the average particle sizes D50 of the powder of alloy R1 and R2 satisfied formula:

0.32≤R2/R1≤0.66;

S3) mixing the powder of alloy R1 and R2; and
S4) subjecting the mixed powders to molding and magnetic field orientation, cold isostatic pressing, sintering, and an annealing process.

The present invention relates to graphene coated iron based particles and a method of producing such. Provided is a composite powder suitable for powder metallurgy and additive manufacturing processes comprising particles of an iron based material with a coating of a graphene based material wherein the concentration of the graphene based material is between 0.1 wt % and 1.0 wt %.

The disclosure relates to a method for forming a metal article by additive manufacturing and related apparatus for performing the method. A metal particle suspension including a UV-curable polymeric resin liquid medium, and metal particles distributed throughout the liquid medium is deposited and cured by spatially selective exposure to UV radiation in a layer-by-layer process. Metal particle size can be selected in combination with the applied layer thickness to ensure complete cure throughout the applied layer while providing a high print speed and high spatial resolution. Intermittent or periodic partial curing of an applied layer can be used to maintain a homogeneous distribution of metal particles in the applied layer prior to full curing. The final product is achieved after sintering, which removes the cured binder in a debinding step and also provides the desired final article at close to the full density.

A method for manufacturing a porous metal body according to the present invention includes: a surface oxidizing step of heating a titanium-containing powder in an atmosphere containing oxygen at a temperature of 250° C. or more for 30 minutes or more to provide a surface-oxidized powder; and a sintering step of depositing the surface-oxidized powder in a dry process, and sintering the surface-oxidized powder by heating it in a reduced pressure atmosphere or an inert atmosphere at a temperature of 950° C. or more.