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rhenium tantalum preparing

  • Rhenium tantalum metal alloy - Honeywell International, Inc.

    Jun 07, 2005· The present invention provides a method for preparing a rhenium-tantalum alloy with improved strength and ductility characteristics. The method includes mixing powders of rhenium and tantalum with a weight ration of approximately 97% rhenium to approximately 3% tantalum.


  • Alkoxide complexes of Rhenium, Niobium and Tantalum

    Alkoxide complexes of Rhenium, Niobium and Tantalum Abstract This thesis describes two major methods for preparation of new mono-, bi- and trimetallic complexes on the basis of Rhenium, Niobium and Tantalum: (1) - the electrochemical method for the synthesis of Re 4 O 4 (OEt) 12 and (2) - the interaction of Rhenium heptoxide, Re 2 O 7


  • I ASD-TDR-62-594

    I ASD-TDR-62-594 Part U INVESTIGATION OF TANTALUM AND ITS ALLOYS r f I TECHNICAL DOCUMENTARY REPORT NO. ASD-TDR-62-594, PART II.May 1963 C.) S .J AF Materials Laboratory Aeronautical Systems Division Air Force Systems Command


  • Industry Info | Preparation Methods of Metal Powder

    Oct 25, 2019· Preparation Methods of Metal Powder. Powder metallurgy is a process for preparing metal powders and using metal (or metal and non-metal mixture) powder as raw materials to form parts and products by molding and sintering. As the main raw material of the industry, metal powder is widely used in the fields of machinery, metallurgy, chemical industry, …


  • Effects of tungsten and rhenium additions on phase ...

    Nickel-based superalloy containing rhenium, tungsten, molybdenum, tantalum and other rare strategic metals has an extremely high value of comprehensive recycling.


  • Refractory-metals: usage and joining practice

    Refractory Metals. Refractory-metals, are agreed to be those with a melting point greater than 2000 °C (3,630 °F).. They include Niobium (formerly known as Columbium), Tantalum, Molybdenum, Tungsten (also known as Wolfram), and Rhenium.. Furthermore in this group are also Osmium and Iridium (two of the platinum-group metals), Rubidium, Hafnium and Technetium which are rare and of limited use.


  • Machining Tantalum, Rhenium, and Molybdenum...

    Aug 02, 2018· I have never machined Tantalum or Rhenium, but I did a turning job in TZM 364 which is a sintered alloy containing 99.4% molybdenum alloyed with Titanium and Zirconium. That shit was nasty. It did chip just like cast iron and made the same kind of noise you get when turning cast iron, but nastier - grinding, rumbling.


  • PROPERTIES OF SOME REFRACTORY METALS. III. THERMAL ...

    properties of some refractory metals. iii. thermal expansion characteristics of tungsten, rhenium, tantalum, molybdenum, niobium, w-25re, ta-10w, and mo-50re


  • Standard Practice for De-Agglomeration of Refractory Metal ...

    1.1 This practice covers the de-agglomeration of refractory metal powders and their compounds in preparation for particle size analysis. 1.2 Experience has shown that this practice is satisfactory for the de-agglomeration of elemental tungsten, molybdenum, rhenium, and tantalum metal powders, and tungsten carbide.


  • Recycling of rhenium-containing wire scrap | Request PDF

    Singh Gaur RP, Braymiller SA, Wolfe TA, Recycling of rhenium-containing wire scrap in the manufacturing of W-Re wire, Paper presented at MPIF 2011, …


  • Alkoxide Route to Mixed Oxides of Rhenium, Niobium, and ...

    Alkoxide Route to Mixed Oxides of Rhenium, Niobium, and Tantalum. Preparation and X-ray Single-Crystal Study of a Novel Rhenium−Niobium Methoxo Complex, Nb 2 (OMe) 8 (ReO 4 ) 2


  • Method for preparing niobium-tungsten alloy | Firmetal Co ...

    Method for preparing niobium-tungsten alloy Firmetal, 2019-03-20 09:21:00 PM. These include billet preparation and plasticity, welding, heat treatment and coating. Preparation of niobium - tungsten alloy ingots. Niobium - tungsten alloys are often prepared by powder metallurgy and smelting.


  • DEVELOPMENT OF CHEMICALLY VAPOR DEPOSITED …

    DEVELOPMENT OF CHEMICALLY VAPOR DEPOSITED RHENIUM EMITTERS OF (0001) PREFERRED CRYSTAL ORIENTATION 1. INTRODUCTION In the direct conversion of heat into electrical energy by thermionic means, the output of the converter is strongly affected by the vacuum work function of the electron emitter.


  • Tantalum (Ta) - Chemical properties, Health and ...

    Tantalum resist corrosion and is almost impervious to chemical attack, for this reason it has been employed in chemical industry, e.g. for heat exchanger in boilers where strong acids are vaporized. Tantalum in the environment. Because tantalum oxide is very insoluble, there is almost no tantalum to be found in natural waters.


  • US4109058A - X-ray tube anode with alloyed surface and ...

    Rhenium is commonly used as an alloying metal with tungsten but it has the disadvantage of being a very expensive and relatively scarce material. Iridium, rhodium, tantalum, osmium, platinum and molybdenum are further examples of metals which are known to …


  • Thermal properties of heterometallic oxymethoxy ...

    Thermal properties of heterometallic oxymethoxy derivatives of rhenium, niobium, and tantalum Article in Inorganic Materials 43(4):392-397 · April 2007 with 3 Reads How we measure 'reads'


  • Phase Diagram of the Iridium-Rhenium System | Johnson ...

    The experimental data on the binary metallic iridium-rhenium system available to date are inconsistent. The present work summarises recent experimental data on the Ir-Re system with the aim of allowing the correct solidus parts of the equilibrium phase diagram to be constructed. The examination of data obtained by different synthetic methods and thermodynamic calculations has revealed that the ...


  • Method for preparing tantalum-tungsten alloy blank ...

    Method for preparing tantalum-tungsten alloy blank Firmetal, 2019-01-28 09:21:00 PM (1)The powders were mixed with tantalum powder with an average particle size of 3 m ~ 5 m and tungsten powder with an average particle size of 3 m as raw materials and weighed according to the required proportion.


  • AD 4 2 5 2 3 5

    3» Prepare fixturing and tooling for the specific electron tubes, so that ... These included rhenium, tantalum, and tungsten wires of 0.060-inch diameter, and rhenium, titanium, and gold sheet of 0.060-inch thickness. 2. Tooling No alterations were nade to the tooling which had been completed as


  • Phase Diagram of the Iridium-Rhenium System

    Phase Diagram of the Iridium-Rhenium System ... However, difficulties in preparing solid solutions have led to poor and inconsistent information about the Ir-Re system and the corresponding physical ... tantalum (9), rhenium-tungsten (9) and rhenium-rhodium (10), where the regular solution model was ...


  • Tantalum pentoxide - Wikipedia

    Tantalum pentoxide, also known as tantalum(V) oxide, is the inorganic compound with the formula Ta 2 O 5.It is a white solid that is insoluble in all solvents but is attacked by strong bases and hydrofluoric acid. Ta 2 O 5 is an inert material with a high refractive index and low absorption (i.e. colourless), which makes it useful for coatings. It is also extensively used in the production of ...


  • Plating on Refractory Metals | Plating with Refractory ...

    Plating With Refractory and Other Exotic Metals. Electroplating is a process used to provide a protective coating onto the surface of an underlying metal, which is referred to as a substrate, via a technique known as electrodeposition.


  • The specific heats and resistivities of molybdenum ...

    JOURNAL OF THE LESS-COMMON METALS 383 THE SPECIFIC HEATS AND RESISTIVITIES OF MOLYBDENUM, TANTALUM, AND RHENIUM* R. E. TAYLOR AND R. A. FINCH Atomics International, Canoga Park, Calif. (U.S.A.) (Received July nth, 1963) SUMMARY An a.c. bridge method for measuring the electrical resistivities of conductors from room temperature to 20oo and a pulse heating method of …


  • Creep behavior of electron-beam-melted rhenium

    CREEP BEHAVIOR OF ELECTRON-BEAM-MELTED RHENIUM by Walter R. Witzke and Peter L. Raffo Lewis Research Center SUMMARY The creep behavior of electron-beam-melted (EB) polycrystalline rhenium sheet was studied in the temperature range 2200' to 4200' F (1477 to 2588 K) under constant load with stresses ranging from 4 to 40 ksi (28 to 276 MN/m 2). ...


  • (PDF) Rhenium Nanochemistry for Catalyst Preparation

    Rhenium Nanochemistry for Catalyst Preparation. ... to-formaldehyde conversion using alkoxide-derived rhenium-tantalum oxide catalyst on mesoporous titania support [54]. ... to prepare highly ...


  • Tantalum | Plansee

    Tantalum is a sensible choice whenever high corrosion resistance is required. Even though tantalum is not one of the noble metals, it is comparable to them in terms of chemical resistance. In addition, tantalum is very easy to work at well below room temperature despite its …


  • US5437744A - Molybdenum-rhenium alloy - Google Patents

    A molybdenum-rhenium alloy having an excellent low temperature ductility paired with an excellent high temperature strength. The alloy consists, essentially in % by weight, of 42 up to <45% Re, up to 3% each of W, Y, Rh, Sc, Si, Ta, Tb, V, Nb or Zr at which the sum of said elements is no greater than about 5%, the remainder being Mo besides normally present impurities.


  • CVD rhenium and PVD tantalum gate MOSFETs fabricated with ...

    CVD rhenium and PVD tantalum gate MOSFETs fabricated with a replacement technique Article in IEEE Electron Device Letters 25(12):775 - 777 · January 2005 with 5 Reads How we measure 'reads'


  • HYDROGEN EMBRITTLEMENT OF TANTALUM

    is used to prepare some grades of tantalum powders for capacitor applications. Under some special conditions, ... osmium, rhenium, and ruthenium were effective laboratory tests. Contact of the noble metal with the tantalum can be made by riveting or welding a small spot of noble metal onto the ... preventing the hydrogen embrittlement of tantalum.


  • Method of production of nickel and rhenium powders with ...

    The invention relates to the regeneration of secondary metal raw materials, in particular to the processing of metal waste rhenium-containing superalloys based on Nickel superalloys), in particular electrochemical method of producing metal powders of Nickel and rhenium with different ratio of components from exhaust heat-resistant alloys based on Nickel during their processing.