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

A cutting tool insert has an optimal hardness and high toughness for demanding cutting operations in hardened steel and cast iron. The cutting tool includes a substrate of cemented carbide where the cemented carbide has hard constituents of tungsten carbide (WC) and a (Co) binder phase, chromium (Cr) and at least one additional element from the group: Vanadium (V), Niobium (Nb), Molybdenum (Mo) and Iron (Fe). The cemented carbide further has a Co-content of 3.50-4.20 wt % of the cemented carbide, a Cr-content of 0.31-0.38 wt % of the cemented carbide, a WC-content of at least 95.22 wt % of the cemented carbide and wherein the cemented carbide has a coercivity of 26-32 kA/m

To provide a flaky silver powder having a tapped density of from 0.8 g/mL to 1.9 g/mL, and a cumulative 50th percentile particle diameter (D.sub.50) of from 2 ?m to 7 ?m, where the cumulative 50th percentile particle diameter (D.sub.50) is measured by laser diffraction or laser scattering particle size analysis.

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.

In an example of a method for forming a high-strength, lightweight alloy, starting materials are provided. The starting materials include aluminum, iron, and silicon. The starting materials are ball milled to generate the high-strength, lightweight alloy of a stable Al.sub.xFe.sub.ySi.sub.z phase, wherein x ranges from about 3 to about 5, y ranges from about 1.5 to about 2.2, and z is about 1.

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.

A process for producing silicon nano-particles from a raw silicon material, the process including steps of alloying the raw silicon material with at least one alloying metal to form an alloy; thereafter, processing the alloy to form alloy nano-particles; and thereafter, distilling the alloying metal from the alloy nano-particles whereby silicon nano-particles are produced.

The present invention provides a producing method of R-T-B-based sintered magnets in which, the recovery chamber 40 includes inert gas introducing means 42, evacuating means 43, a carry-in port, a discharge port 40a, and a recovery container 60. The recovery step includes a carrying-in step of conveying a processing container 50 into the recovery chamber 40, a discharging step of discharging coarsely pulverized powder in the processing container 50 into the recovery chamber 40, a gas introducing step of introducing inert gas into the recovery chamber 40, and an alloy accommodating step of recovering the coarsely pulverized powder into the recovery container 60. Addition of pulverization aid is carried out in the alloy accommodating step. A remaining amount of coarsely pulverized powder in the recovery chamber 40, an oxygen-containing amount of the R-T-B-based sintered magnet is reduced, and magnetic properties are enhanced.

The present invention provides a producing method of R-T-B-based sintered magnets in which, the recovery chamber 40 includes inert gas introducing means 42, evacuating means 43, a carry-in port, a discharge port 40a, and a recovery container 60. The recovery step includes a carrying-in step of conveying a processing container 50 into the recovery chamber 40, a discharging step of discharging coarsely pulverized powder in the processing container 50 into the recovery chamber 40, a gas introducing step of introducing inert gas into the recovery chamber 40, and an alloy accommodating step of recovering the coarsely pulverized powder into the recovery container 60. Addition of pulverization aid is carried out in the alloy accommodating step. A remaining amount of coarsely pulverized powder in the recovery chamber 40, an oxygen-containing amount of the R-T-B-based sintered magnet is reduced, and magnetic properties are enhanced.

A reagent includes an element, formally in oxidation state zero, in complex with a hydride molecule and an incorporated ligand. The incorporated ligand typically has surface active properties. The reagent, termed a Ligated Anionic Element Reagent Complex, can be useful in synthesis of elemental nanoparticles. A method for synthesizing the aforementioned reagent includes a step of ball-milling a mixture containing an elemental powder, bulk hydride molecule, and bulk ligand. The components of the reagent, once complexed, have altered electronic structure and vibrational modes.