A preparation method of an AlTiNbB intermediate alloy includes following steps. KBF.sub.4 powder, Nb powder, and Ti powder are ball milled to obtain mixed powder, the mixed powder is pressed to obtain a ball-milled block, an Al block is melted to obtain an Al melt, the ball-milled block is added to the Al melt followed by smelting to obtain alloy liquid, and the alloy liquid is cast to obtain the AlTiNbB intermediate alloy as a refining agent. A high-energy ball milling process is introduced into the preparation method of the AlTiNbB intermediate alloy, improving reaction activity and lowering a reaction threshold. An -Al grain can be refined to be less than 90 m due to uniform dispersion of refining nucleation particles of the refining agent, the refining agent has a great refining effect. The preparation method is simple with easy steps and operations, the AlTiNbB intermediate alloy has high purity.

A cermet tool includes from 75-95 volume % of a hard phase and from 5-25 volume % of a binder phase. The hard phase has a first hard phase with a core portion of (Ti, Nb, Mo) (C, N) and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), a second hard phase with both a core portion and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), and a third hard phase of (Ti, Nb, Mo) (C, N). The ratio of Nbs/Nbi is from 0.8 to 1.2, where Nbs is a maximum Nb amount in a surface region and Nbi is an internal Nb amount in an internal region. The ratio of Ws/Wi is from 1.0 to 1.5, where Ws is a maximum W amount in the surface region and Wi is an internal W amount in the internal region. The area ratios A1, A2, and A3 of the respective hard phases are from 75 to 95 area % for A1, from 4 to 24 area % for A2, and from 1 to 24 area % for A3.

The present invention provides a process for preparing tantalum powders for use in an electrolytic capacitor with high reliability and high specific capacitance, characterized in that the ratio of the average particle size of raw tantalum powders to the average particle size of tantalum flake powders is 0.5-25, preferably 1.5-10, more preferably 2-5. The process of the present invention is simple and has good controllability, the tantalum flake powder obtained has low content of metal impurities, high specific surface area, and after agglomerated, have good flowability and moldability, have high specific capacitance, and when used under high voltage, have low leakage current and high breakdown voltage.

Biodegradable, magnesium alloys and composites, articles produced therefrom, methods of making the same, and methods of using the same are described.

Disclosed herein is a method comprising disposing a container containing a metal and/or ferromagnetic solid and abrasive particles in a static magnetic field; where the container is surrounded by an induction coil; activating the induction coil with an electrical current, to heat up the metallic or ferromagnetic solid to form a fluid; generating sonic energy to produce acoustic cavitation and abrasion between the abrasive particles and the container; and producing nanoparticles that comprise elements from the container, the metal and/or the ferromagnetic solid and the abrasive particles. Disclosed herein too is a composition comprising first metal or a first ceramic; and particles comprising carbides and/or nitrides dispersed therein. Disclosed herein too is a composition comprising nanoparticles comprising chromium carbide, iron carbide, nickel carbide, y.-Fe and magnesium nitride.

An electrical device that includes an electrically-conductive substrate having a flexible structure; and wherein the flexible structure is formed by coating, encapsulating, and entangling it with porous silicon nano-particles, and wherein the porous silicon nano-particles are produced according to steps of: (I) alloying a raw silicon material with at least one distillable alloying metal selected from zinc and magnesium to form an alloy; (II) milling the alloy to form alloy nano-particles of 100 nm-150 nm in diameter, and doing the milling in an inert environment to alleviate oxidation of the alloy; (III) distilling the alloying metal from the alloy nano-particles so that a porous silicon structure is produced, the distilling being performed in a vacuum furnace; and (IV) milling the porous silicon structure in an inert environment to break the porous silicon structure apart, thereby to produce the porous silicon nano-particles.

A hydrogen-absorbing alloy is provided in which an X-ray diffraction image generated by CuK rays has at least one peak selected from (1) peak Psp1 at 2=32.250.15, (2) peak Psp2 at 2=33.550.15, and (3) peak Psp3 at 2=37.270.15.

Provided is an SmFeN rare earth magnet comprising SmFeN crystal grains. An oxygen content in the SmFeN rare earth magnet is 0.5% by mass or less on the basis of a total amount of the SmFeN rare earth magnet, and an average grain size of the SmFeN crystal grains is 1 m or less.

Provided is an SmFeN rare earth magnet comprising SmFeN crystal grains. An oxygen content in the SmFeN rare earth magnet is 0.5% by mass or less on the basis of a total amount of the SmFeN rare earth magnet, and an average grain size of the SmFeN crystal grains is 1 m or less.

Provided are a silver powder that can reduce line resistance and a method of producing the same. The silver powder has a diameter at a cumulative value of 50% of 3 m or more and a ratio of particles of 10 m or larger of 10% or less. The silver powder includes flake-like particles having a major axis of 6 m or more and irregularly shaped particles having a major axis of less than 6 m, an average aspect ratio that is a ratio of average major axis relative to average thickness of the flake-like particles is 8 or more, and a shape factor that is a ratio of area of a circle having average maximum length of the irregularly shaped particles as a diameter relative to average particle area of the irregularly shaped particles is 1.7 to 1.9. Ignition loss is 0.1 wt % to 0.4 wt %.