A powder-metallurgical sintered molybdenum part which is present as a solid body has the following composition: a molybdenum content of 99.93% by weight, a boron content B of 3 ppmw and a carbon content C of 3 ppmw, with a total content BaC of carbon and boron being in a range of 15 ppmwBaC50 ppmw, an oxygen content O in a range of 3 ppmwO20 ppmw, a maximum tungsten content of 330 ppmw and a maximum proportion of other impurities of 300 ppmw. A powder-metallurgical process for producing such a sintered molybdenum part is also provided.

Methods for grain refinement of beryllium articles are disclosed. Grain refinement allows the beryllium article to have beneficial properties in terms of strength and durability. One method stabilizes the ?-phase of the beryllium that is precipitated after cycling above a temperature that is greater than or equal to the beta transus temperature.

Methods for processing an iron cobalt alloy, along with components formed therefrom, are provided. The method may include: pre-annealing a sheet of an iron cobalt alloy at a pre-anneal temperature (e.g., about 770 C. to about 805 C.); thereafter, cutting a component from the sheet; thereafter, heat-treat annealing the component at a treatment temperature (e.g., about 845 C. to about 870 C.) for a treatment period (e.g., about 1 minute to about 10 minutes); and thereafter, exposing the component to oxygen at an oxidizing temperature to form an insulation layer on a surface of the component.

Methods for processing an iron cobalt alloy, along with components formed therefrom, are provided. The method may include: pre-annealing a sheet of an iron cobalt alloy at a pre-anneal temperature (e.g., about 770 C. to about 805 C.); thereafter, cutting a component from the sheet; thereafter, heat-treat annealing the component at a treatment temperature (e.g., about 845 C. to about 870 C.) for a treatment period (e.g., about 1 minute to about 10 minutes); and thereafter, exposing the component to oxygen at an oxidizing temperature to form an insulation layer on a surface of the component.

A method of making an article includes depositing a plurality of layers to form a three-dimensional preform, sintering the preform to form a sintered preform, and infiltrating the preform with at least one metal to form the article. At least one layer of the plurality of layers is formed from a beryllium-containing composition including beryllium powder. The infiltrating metal can be selected from aluminum and magnesium.

A method of making an article includes depositing a plurality of layers to form a three-dimensional preform, sintering the preform to form a sintered preform, and infiltrating the preform with at least one metal to form the article. At least one layer of the plurality of layers is formed from a beryllium-containing composition including beryllium powder. The infiltrating metal can be selected from aluminum and magnesium.

A novel medium heavy alloy (MHA) a composition designed and processed such that the MHA has properties comprising a tensile strength of about 1527 MPa, a proof strength of about 1337 MPa, and an impact toughness of about 180 J, when the MHA is forged, and the tensile strength of about 1746 MPa, the proof strength of about 1571 MPa, and the impact toughness of about 55 J, when the MHA is agedly treated. The superior strength-toughness is attributed to the face-centered cubic matrix and/or the nano-sized secondary phases. The superior dynamic performance is attributed to the widening of adiabatic shear bands.

Thermoelectric devices including Arsenic-Phos-phorous (As.sub.xP.sub.1-x) as a source of power, wherein x is a number ranging from 0.1 to 1, are provided. Methods of making crystalline Arsenic-Phosphorous (As.sub.xP.sub.1-x), wherein x ranges from 0.1 to 1, are also provided. The methods include annealing phosphorous and arsenic at a temperature and under conditions sufficient to produce crystalline formation.

Thermoelectric devices including Arsenic-Phos-phorous (As.sub.xP.sub.1-x) as a source of power, wherein x is a number ranging from 0.1 to 1, are provided. Methods of making crystalline Arsenic-Phosphorous (As.sub.xP.sub.1-x), wherein x ranges from 0.1 to 1, are also provided. The methods include annealing phosphorous and arsenic at a temperature and under conditions sufficient to produce crystalline formation.

Methods for grain refinement of beryllium articles are disclosed. Grain refinement allows the beryllium article to have beneficial properties in terms of strength and durability. The method disclosed herein provide for efficient grain refinement using in situ formed intermetallic compounds of beryllium.