This disclosure relates to a high cBN content polycrystalline cubic boron nitride, PCBN, material. The binder matrix material comprises 2 to 15 wt. % titanium diboride (TiB2).

To reduce size and mass of a nuclear reactor system, an integrated in-vessel shield separates the role of a neutron reflector and a neutron shield. Nuclear reactor system includes a pressure vessel including an interior wall and a nuclear reactor core located within the interior wall of the pressure vessel. Nuclear reactor core includes a plurality of fuel elements and at least one moderator element. Nuclear reactor system includes a reflector located inside the pressure vessel that includes a plurality of reflector blocks laterally surrounding the plurality of fuel elements and the at least one moderator element. Nuclear reactor system includes the in-vessel shield located on the interior wall of the pressure vessel to surround the reflector blocks. In-vessel shield is formed of two or more neutron absorbing materials. The two more neutron absorbing materials include a near black neutron absorbing material and a gray neutron absorbing material.

Disclosed is a coating material for coating a surface of a kiln for preparing an active material, the coating material being represented by the following Formula 1:

Ni.sub.aX.sub.z  (1) wherein an equation of a+z=1 is satisfied, with the proviso that 0.2≤a<1.0 and 0<z≤0.8 are satisfied, and X is at least one element selected from the group consisting of W, Cr, Co, Fe, Cu, Na, Al, Mg, Si, Zn, K, Ti, Mo, N, B, P, C, Ta, Nb, O, Mn, Sn, Ag and Zr, or an alloy or compound of two or more elements selected therefrom.

Disclosed are a carbon nanotube (CNT)-based three-dimensional ordered macroporous (3DOM) carbon material and a preparation method thereof. The CNT-based 3DOM carbon material comprises a honeycomb network structure having a 3DOM structure formed by overlapping CNTs, wherein ordered macropores each have a diameter of 270 nm to 360 nm, and the CNTs each have an outer diameter of 8 nm to 20 nm

Provided is a sputtering target, the sputtering target containing 0.05 at % or more of Bi and having a total content of metal oxides of from 10 vol % to 60 vol %, the balance containing at least Co and Pt.

A cBN sinter comprising cubic boron nitride grains and a binder phase, the binder phase comprising Ti.sub.2CN and Co.sub.2B, wherein the ratio I.sub.Ti2CN/I.sub.Co2B of a peak intensity I.sub.Ti2CN assigned to Ti.sub.2CN appearing at 2θ = 41.9° to 42.2° to a peak intensity I.sub.TiAl3 assigned to Co.sub.2B appearing at 2θ = 45.7° to 45.9° is in a range of 0.5 and 2.0 in an XRD measurement.

A super hard polycrystalline construction is disclosed as comprising a first region comprising a body of thermally stable polycrystalline diamond material comprising a plurality of intergrown grains of diamond material; a second region forming a substrate to the first region; and a third region interposed between the first and second regions. The third region extends across a surface of the second region along an interface. The interface comprises at least a portion having an uneven topology, and the third region comprises a diamond composite material including a first phase comprising a plurality of non-intergrown super hard grains, said super hard grains comprising diamond grains; and a matrix material. The superhard material and matrix material of the third region form a diamond composite material which is more acid resistant than polycrystalline diamond material having a binder-catalyst phase comprising cobalt, and/or more acid resistant than cemented tungsten carbide material.

Embodiments are directed to the field of ceramics and relate to electron-emitting ceramics such as those which can be used as cathode material for electron emissions in space flight systems, for example. Embodiments specify an electron-emitting ceramic which has an improved temperature conductivity with a simultaneously continuous electron emission. The electron-emitting ceramic contains at least>70 vol. % C12A7 electride and a proportion of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, In, Sn, Sb, Te, Tl, Pb, or Bi as metal and/or with Ti, wherein the proportion of the metals lies between>0 and<30 vol. %, and the ceramic has a density of at least 85% of the theoretical density of the ceramic and the ceramic contains 0 to maximally 10 vol. % production-specific impurities.

A carbon-metal/alloy composite material includes a composition represented by (1-a)Sn.sub.1-xM.sup.1.sub.x+aM.sup.2+cC, wherein: M.sup.1 includes one or more transition metals, metals, or metalloids; M.sup.2 includes one or more transition metals, metals, or metalloids; x is 0≦x≦1; a is 0≦a≦1; and c is 0<c≦99. A method of forming the carbon-metal/alloy composite material includes the steps of dissolving one or more precursor materials in a solvent to form a solution; adding an organic carbon forming precursor to the solution to form a mixture; heating the mixture in an autoclave reactor for a prescribed period of time; separating solids formed from the mixture after the heating; washing the separated solids with a washing solvent; and heating the washed solids under a non-oxidizing atmosphere to form the carbon-metal/alloy composite material.

A metal-ceramic composite for a fuel cell anode is disclosed. In the metal-ceramic composite, the content of the metal is greatly reduced and the intervals between the metal particles are maintained constant, achieving improved activity and conductivity. The metal-ceramic composite includes a metal catalyst raw material and a mixed-conductive ceramic. The metal catalyst raw material is present in an amount such that the content of the metal catalyst nanoparticles in the metal-ceramic composite is significantly lower than in conventional metal-ceramic composites. The presence of a small amount of the metal catalyst nanoparticles in the metal-ceramic composite minimizes the occurrence of stress resulting from a change in the volume of the metal catalyst and provides a solution to the problem of defects, achieving improved life characteristics. Also disclosed is a method for preparing the metal-ceramic composite.