Abstract: A method for fabrication of an anisotropic magnet comprises placing magnet alloy feedstock particles in a deformable metallic container and thermomechanically working the filled container in a manner to elongate the filled container and reduce its cross-sectional area to consolidate the magnet alloy particles to an elongated shape and impart a preferential grain texture to the consolidated, elongated shape. The consolidated, elongated shape is machined to a near-final magnet shape that has a smaller dimension such as magnet length and that includes a metallic tubular skin thereon.

Abstract: Embodiments of the present disclosure relate to a copper-based shape memory alloy (Cu-SMA) having improved shape memory properties. Cu-SMAs, especially in the Cu—Al—Mn family, have low cost, excellent ductility, and a wide range of tunable phase transformations and the associated physical properties. However, the transformation stress of the commonly developed Cu-SMA is low, limiting its application for high load conditions. Alloying Cu-SMAs with transition and/or rare earth metals may effectively increase the transformation stress by forming fine precipitates of intermetallics in the Cu—Al—Mn matrix. For example, 0.5 at % Ce addition can result in increases of 71.4%, and 78.6% in the room temperature transformation stress and peak stress, respectively. When the properly distributed Ce-containing precipitation combined with the additional alloying elements to engineer phase transformation temperature, the obtained Cu-SMAs can offer a wide range of tunable mechanical properties in a wide temperature range.

Abstract: An oscillating heat pipe (OHP) generator is provided. The OHP generator includes a conduit defining a continuous, meandering circuit, a working fluid disposed within the conduit in which the working fluid includes a liquid phase and a vapor phase, and a generator section of the conduit. The generator section includes a magnet disposed within the conduit and one or more conducting coils wrapped around the conduit. In operation, the generator section is arranged parallel to a ground plane.

Abstract: A ribbon of elastocaloric material is provided. The ribbon is made from copper alloyed with aluminum and manganese. The ribbon has a length, a width, and a thickness. The length is a longest dimension of the ribbon, and the width is perpendicular to the length. The thickness is perpendicular to both the length and the width, and the thickness is 0.1 mm or less. Further, in a room temperature ambient environment, the ribbon increases in temperature by at least 4° C. upon application of 6% of tensile strain and cools by at least 4° C. when the tensile strain is unloaded.

Abstract: Fe-6.5% Si electrical steel is alloyed with boron to reduce its melting temperature and interfacial energy to improve processability for melt-spinning applications. Boron additions from 0.01 wt % to 2.24 wt % into Fe-6.5% Si and its effect on ribbon thickness, grain size, magnetic, and mechanical properties are disclosed. Minor boron alloying significantly changed the melt pool stability and wetting on a melt-spinning quench wheel and in turn increased the quench rate with minimum impact on the magnetic saturation and ductility. Boron addition of less than 0.06 wt % was also found beneficial to the magnetic property of the alloy by lowering both its hysteresis and eddy current losses.

Abstract: A permanent magnetic composition comprising the formula: (LaxMyNd1-x-y)rFevM?zCo14-v-zBw??(1) wherein 0.1?x<1, 11?v?14, 0?y?0.3, 0?z?0.5, 1.9?r?3, 0.1?(x+y)<1, 11?(v+z)?14, and 1.0?w?1.1, wherein M represents one or more lanthanide elements other than La and Nd, and M? represents one or more transition metal elements other than Fe and Co, or M? represents one or more main group elements other than B; or the permanent magnet may be more particularly described by the formula (LaxNd1-x)rFevCo14-vBw or LaNdFe12Co2B, wherein x, v, and w are defined above. Also described herein are methods for producing the permanent magnet.

Abstract: The present invention provides a method for making anisotropic or isotropic MnBi bonded bulk permanent magnet wherein starting high purity ?-MnBi (LTP) mono-crystalline fine feedstock powder particles or c-axis textured polycrystalline coarse powder particles are coated or covered with a single binder coating or a multi-binder coating system. The processed MnBi powder (which is coated or mixed with one or more polymer(s)) is pressed and/or consolidated to produce a dense anisotropic bonded magnet under a magnetic field or a dense isotropic bonded magnet without a magnetic field, at room temperature or elevated temperature. The polymer(s) used herein serve multiple functions: holding the powders together as a binder, isolating powder particles as a boundary phase to reduce magnetic exchange coupling among the particles and thus preferably retain a higher coercivity Hc close to that of the starting MnBi powder, and protecting the powder from oxidation.

Abstract: The present invention provides a method for making anisotropic or isotropic MnBi bonded bulk permanent magnet wherein starting high purity ?-MnBi (LTP) mono-crystalline fine feedstock powder particles or c-axis textured polycrystalline coarse powder particles are coated or covered with a single binder coating or a multi-binder coating system. The processed MnBi powder (which is coated or mixed with one or more polymer(s)) is pressed and/or consolidated to produce a dense anisotropic bonded magnet under a magnetic field or a dense isotropic bonded magnet without a magnetic field, at room temperature or elevated temperature. The polymer(s) used herein serve multiple functions: holding the powders together as a binder, isolating powder particles as a boundary phase to reduce magnetic exchange coupling among the particles and thus preferably retain a higher coercivity Hc close to that of the starting MnBi powder, and protecting the powder from oxidation.

Abstract: A novel architecture for al motor rotor and stator of an electrical motor device as well as other electromagnetic device using soft magnetic wires and/or strips bundled and shaped to provide a desired magnetic flux path.

Abstract: This invention relates to a lubricating oil composition for a hydrogen fueled internal combustion engine (H2ICE) comprising or resulting from the admixing of: (i) base oil, (ii) a functionalized polymer, (iii) an overbased magnesium based detergent, (iv) an overbased calcium based detergent and (iv) one or more, optionally borated, higher and lower molecular weight PIBSA-PAM dispersants, and one or more zinc hydrocarbyl diphosphate compounds. The composition has a total sulfated ash of less than or equal to 1.0 wt. %, a kinematic viscosity at 100° C. of 5 to 20 cSt, a total phosphorous level of less than or equal to 0.12 wt. %, and a total sulfur level of less than or equal to 0.4 wt. %.

Abstract: This invention relates to lubricating oil compositions containing less than 1000 ppm phosphorus, comprising or resulting from the admixing of A) one or more base oil(s), B) one or more dispersant(s), wherein said one or more dispersants comprise at least 2.0 mass %, based on the total mass of the lubricating oil composition, of one or more unborated poly(alkenyl)succinimides, in which the polyalkenyl is derived from polyisobutylene and the imide is derived from polyamine (“PIBSA-PAM”); and C) one or more detergent(s), wherein said one or more detergent(s) together provide soap to the lubricating oil composition in an amount of 0.1 to 0.9 mass %, based on the total mass of the lubricating oil composition; wherein the ratio of mass %, based on the total mass of the lubricating oil composition, of the one or more unborated PIBSA-PAM(s) to soap of the lubricating oil composition is 6.65 or more.

Abstract: The present invention provides fine grain structures for rare earth permanent magnets (REPMs) and their production in a manner to significantly enhance flexural strength and fracture toughness of the magnets with no or little sacrifice in the hard magnetic properties. The tough REPMs can have either homogeneous or heterogeneous refined grain microstructural architectures achieved by introducing a small amount of additive particle materials into the magnet matrix, such as fine-sized, insoluble, chemically stable, and non-reactive with the magnet matrix. These additive materials can act effectively as both heterogeneous nuclei sites and grain growth inhibitors during the heat treatment processes, which in turn resulting in refined grain structures of the REPMs. Alternatively, the fine grain structures were also achieved by using magnet alloy feedstock powders with finer particle sizes.

Abstract: Disclosed are embodiments of an antiferroelectric (AFE) ceramic. The AFE ceramic includes a PbZrO3-based composition. The AFE ceramic has a charge-discharge energy efficiency of at least 96%, and the AFE ceramic has a recoverable energy density of at least 2.8 J/cm3 at a peak field of at least 200 kV/cm. Embodiments of a method of identifying potential AFE ceramic compositions having high energy efficiency and recoverable energy density are also disclosed.

Abstract: The present invention provides fine grain structures for rare earth permanent magnets (REPMs) and their production in a manner to significantly enhance flexural strength and fracture toughness of the magnets with no or little sacrifice in the hard magnetic properties. The tough REPMs can have either homogeneous or heterogeneous refined grain microstructural architectures achieved by introducing a small amount of additive particle materials into the magnet matrix, such as fine-sized, insoluble, chemically stable, and non-reactive with the magnet matrix. These additive materials can act effectively as both heterogeneous nuclei sites and grain growth inhibitors during the heat treatment processes, which in turn resulting in refined grain structures of the REPMs. Alternatively, the fine grain structures were also achieved by using magnet alloy feedstock powders with finer particle sizes.

Abstract: New types of particle feedstocks and heterogeneous grain structures are provided for rare earth permanent magnets (REPMs) and their production in a manner to significantly enhance toughness of the magnet with little or no sacrifice in the hard magnetic properties. The novel tough REPMs made from the feedstock have heterogeneous grain structures, such as bi-modal, tri-modal, multi-modal, laminated, gridded, gradient fine/coarse grain structures, or other microstructural heterogeneity and configurations, without changing the chemical compositions of magnets.

Abstract: New types of particle feedstocks and heterogeneous grain structures are provided for rare earth permanent magnets (REPMs) and their production in a manner to significantly enhance toughness of the magnet with little or no sacrifice in the hard magnetic properties. The novel tough REPMs made from the feedstock have heterogeneous grain structures, such as bi-modal, tri-modal, multi-modal, laminated, gridded, gradient fine/coarse grain structures, or other microstructural heterogeneity and configurations, without changing the chemical compositions of magnets.

Abstract: A bulk permanent magnet composition comprising the formula (Ce1-xM1x)2.7-(v+w)M2v(Fe14-yCoy)1-zM3zB, or alternatively, (Ce1-xM1x)2-vM2v(Fe14-yCoy)1-zM3zB, wherein: M1 represents at least one lanthanide element other than Ce; M2 represents at least one element selected from the group consisting of Sn, Sb, Bi, Pb, Ca, Sr, and Zr; M3 represents at least one element selected from the group consisting of Ti, Cr, Mn, Ni, Cu, Zn, Zr, Nb, Mo, W, Ta, and Hf; 0?x<1; 0?v?1; 0?y?3; 0?w?0.8; and 0?z?1. Also described herein are methods for producing the permanent magnet.

Abstract: A lead zirconate-based antiferroelectric material is provided that includes lithium and bismuth substitutions for lead on the perovskite crystal structure. The lithium and bismuth are provided at an atomic ratio of 1:1, and the lead may substituted with lithium and bismuth up to 16 at %. The modified composition provides increased energy efficiency, increased dielectric breakdown strength, and lower sintering temperature. The modified composition is suitable for use as a capacitor having high power density and energy density.