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Saturday, August 1, 2020 | History

3 edition of Evaluation of rhenium joining methods found in the catalog.

Evaluation of rhenium joining methods

Evaluation of rhenium joining methods

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  • 14 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Bonded joints.,
  • Diffusion welding.,
  • Electron beam welding.,
  • Flat plates.,
  • Intermetallics.,
  • Metal bonding.,
  • Rhenium.

  • Edition Notes

    StatementBrian D. Reed and Sybil H. Morren.
    SeriesNASA technical memorandum -- 107055.
    ContributionsMorren, Sybil H., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15421604M

    The ICP-AES technique was developed for rhenium determination in the range of - % in copper and molybdenum ores along with their concentrates. The sample pretreatment method by sintering with magnesium oxide and oxidizing agents was offered for analysis; optimum conditions for samples digestion were by: 4. They detected rhenium spectroscopically in platinum ores and in the minerals columbite ((Fe, Mn, Mg)(Nb, Ta) 2 O 6), gadolinite ((Ce, La, Nd, Y) 2 FeBe 2 Si 2 O 10) and molybdenite (MoS 2). Rhenium is present in these materials only in trace amounts. In , Noddack and Berg were able to extract 1 gram of rhenium from kilograms of molybdenite.

    @article{osti_, title = {Experimental Design for Evaluation of Co-extruded Refractory Metal/Nickel Base Superalloy Joints}, author = {Petrichek, ME}, abstractNote = {Prior to the restructuring of the Prometheus Program, the NRPCT was tasked with delivering a nuclear space reactor. Potential NRPCT nuclear space reactor designs for the Prometheus Project required dissimilar materials to be. Rhenium is a rare metal with unique properties that make it ideally suited for today’s most powerful engines and critical chemical reactions. Eagle Alloys is a premier rhenium metal supplier providing rhenium in both its pure form and most popular alloys.

    Rhenium. Rhenium (element #75, symbol Re) is a rare, silvery-white metallic element. Rhenium is found as a trace element in platinum ores and in the mineral columbite. It is very dense and has a melting temperature of degrees C ( degrees F). Rhenium (Re) is a β -emitting radionuclide. Emitted β -particles have ranges up to mm in tissue, capable of delivering high doses to skeletal regions of high Re concentrations while sparing adjacent radiosensitive regions and thus making the irradiation well tolerated for the patient. Along with the >β-emissions, γ-rays are emitted having an adequate Cited by: 2.


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Evaluation of rhenium joining methods Download PDF EPUB FB2

EVALUATION OF RHENIUM JOINING. METHODS Brian D. Reed and Sybil H. Morren. NASA Lewis Research Center Cleveland, Ohio Abstract Coupons of rhenium-to-CI03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests.

(3 File Size: 6MB. Get this from a library. Evaluation of rhenium joining methods. [Brian D Reed; Sybil Huang Morren; United States. National Aeronautics and Space Administration.]. Coupons of rhenium-to-Cl03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests.

Shear testing was conducted on as-received, thermally-cycled ( cycles, from 21 to C), and thermally-aged (3 and 6 hrs at C) joint coupons. Evaluation of rhenium joining methods Conference Reed, B D ; Morren, S H Coupons of rhenium-to-Cl03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests.

PHYSICAL FOUNDATIONS OF RHENIUM-OSMIUM METHOD – A REVIEW 24 (α decay) with T1/2 = x 10 15 years. Another isotope, Os, is formed by β-decay of Re and this pair of isotopes forms the physical basis of the Re-Os geochro-nology.

Because the maximum energy of β particles emitted from Re is extremely low at keV, even compared. Rhenium is a transition metal. Like the other members of the group it is less reactive than the typical metals but more reactive than the less typical metals. The transition metals are characterized by having the outermost electron shell containing two electrons and.

Purpose: The article characterises rhenium in terms of its physiochemical properties, most popular methods of manufacturing and key applications. The examples of rhenium at a nanometric scales are also presented, taking into account the latest literature reports in this field. The International Symposium on Technetium and Rhenium – Science and Utilization (ISTR) aims at covering all aspects of Technetium and Rhenium chemistry, from the role of Tc in the nuclear fuel.

Rhenium sorption from carbonate and hydrocarbonate solutions proceeds similarly to that for sulfate solutions. Rhenium is sorbed better from sodium carbonate solutions than from ammonium hydrocarbonate solutions. Uranium is well sorbed with the anion exchange resin in sulfate form and badly with the anionite in nitrate and chloride by: The paper describes mechanical joining methods used in car body production as alternatives to conventional joining methods such as resistance spot welding and laser welding or laser brazing.

Carrying capacities of methods of mechanical joining and resistance spot welding of various materials used in car body structures are Size: KB.

Rhenium metal superconducts at 2. 4 K. Methylrhenium trioxide ("MTO"), CH3ReO3 is a volatile, colourless solid has been used as a catalyst in some laboratory experiments.

It can be prepared by many routes, a typical method is the reaction of Re2O7 and tetramethyltin:; Rhenium is a chemical. Davenport, W.H. “Rhenium Sources and Methods of Extraction and Refining.” Paper presented at the annual meeting of the American Institute of Mining, Metallurgical, and Petroleum Engineers, New York City, February Cited by: The following review is based on a number of excellent annual surveys of the rhenium chemistry which have been compiled by the Royal Society of Chemistry in the series of Annual Reports 23–30 and articles appearing in Coordination Chemistry Reviews.

31–36 Additional reviews are available which cover special fields and aspects of rhenium chemistry, such as catalysis, 37–42 structural chemistry, 43,44.

Examples of metallic rhenium manufacturing methods (own study based on [1,10]) Method Characteristics of the method Input material Reduction of rhenium compounds with hydrogen The source of rhenium is potassium or ammonium perrhenate.

The process temperature is °C. Reduction with hydrogen occurs optionally in accordance with the following. Rhenium is a chemical element with the symbol Re and atomic number It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's m has the third-highest melting point and second-highest boiling point of any stable element at K Pronunciation: /ˈriːniəm/ ​(REE-nee-əm).

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 Cited by: The methods proposed in chapters are on rhenium which are based on the complexation of lower valent rhenium with thiocyanate and nitroprusside using ascorbic acid as reductant, while the other one employs 2-aminonitrobenzothiazole as a complexing agent for rhenium File Size: 7MB.

A CONTRIBUTION TO THE CHEMISTRY OF RHENIUM. By C. Lundell and H. Knowles ABSTRACT A study of the behavior of rhenium when dilute solutions of potassium per­ rhenate are acidified with sulphuric acid, cooled, and passed through the Jones reductor, indicates that rhenium forms a compound in which it has a valency ofFile Size: 8MB.

Rhenium is a heavy transition refractory metal with a melting point of 3,°C and has the highest modulus of elasticity of all the refractory metals ( GPa). Rhenium and rhenium containing alloys are unique with high melting points, high moduli of elasticity.

Search the world's most comprehensive index of full-text books. My library. Thermal Properties Applications. Introduction. Rhenium is a silvery-white metal, with one of the highest melting points of all metals. With an average concentration of 1 ppb, rhenium is one of the rarest elements in the Earth’s crust.Rhenium does not occur free in nature or as a compound in any distinct mineral; instead it is widely distributed in small amounts in other minerals, usually in concentrations averaging about parts per million.

Chile is the world leader in rhenium recovery, followed by the United States, Poland, Uzbekistan, and Kazakhstan. Rhenium occurs up to about 20 parts per million in molybdenite.Rhenium has high melting point of °C next to tungsten.

The ductility of rhenium can be maintained even after recrystallization. It is best-suited for filaments due to its high electrical resistivity and low vapor pressure.

Rhenium can be added to other refractory metals as it improves the ductility and tensile strength of the alloys.