Use of hard alloys based on titanium carbide as wear-resistant materials and cutting tools

Conclusions Grade KTS alloys can be used as wear-resistant materials and as tool alloys for machining unhardened steels.Translated from Poroshkovaya Metallurgiya, No. 5(173), pp. 94–97, May, 1977.     

Corrosion Cracking of Steam Turbine Disks Operating in the Zone of Phase Transformation

The problem of corrosion-cracking damage of turbine rotor disks in the zone of phase transformation is considered. Factors affecting the damage (structure, metal, features of operation, water chemistry) are described, and some recommendations for preventing this kind of damage are given.     

Transition of graphite into diamond in a solid phase under the atmospheric pressure

Transition of small-size graphite particles into diamond has been experimentally detected under atmospheric pressure. The transformation in a solid phase occurs when graphite heated up to 2500 K is rapidly cooled. Electron and X-ray diffraction methods were applied to investigate the solid-phase transition products. The transition of graphite into diamond may be explained whether by the setting up of high pressures or by retention in quenching the structures that are characteristic for elevated temperatures.     

Calculation of the optimum rate of axial cutting in glass drilling by diamond tools

Glass and Ceramics -     

Structure and Some Properties of a Double Neptunyl(V) Cesium Molybdate,Cs[NpO<Subscript>2</Subscript>MoO<Subscript>4</Subscript>(H<Subscript>2</Subscript>O)]

A double neptunyl(V) cesium molybdate, Cs[NpO₂MoO₄(H₂O)], was studied by single crystal X-ray diffraction. Crystal data: rhombic system, a = 9.478(2), b = 7.900(1), c = 10.499(2) Å; space group Pnna, Z = 4, d = 5.05 g cm^?3, R = 0.030. The compound has a framework structure; the coordination polyhedron of the Np atom is a distorted pentagonal bipyramid with the equatorial positions occupied by four O atoms of four molybdate groups and an O atom of the coordinated water molecule. The IR and visible absorption spectra of this compound and of Cs₂[(NpO₂)₂Mo₂O₈] whose structure had been determined previously were measured. The NpO ₂ ⁺ stretching vibration frequencies in the IR spectra of these compounds virtually coincide. Incorporation of the O atom of the Mo-O-Mo bridge into the first coordination sphere of the neptunyl(V) ion in Cs₂[(NpO₂)₂Mo₂O₈] exerts the same disturbing effect on the electronic absorption spectrum as does the cation-cation interaction with one of the O atoms acting as a bridge between two Np atoms.     

Reconditioning of the pressure face of the waterworks facility on Sytykan River

The possibility of creation of a frozen-ground curtain in permeable soils with a permeability of 800 – 900 m-day with the help of a liquid system with forced circulation of kerosene is shown.Translated from Gidrotekhnicheskoe Stroitelstvo, No. 12, December 2004, pp. 14 – 22.