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in subjects: "Platinum Metal Alloys"  
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Analysis of thick film conductor inks

Description: A project undertaken to determine the ink characteristics affecting fired films is described. The analytical methods used were thermogravimetric analysis, pryolysis-gas chromatography, infrared spectrophotometry, mass spectrometry, atomic absorption spectrophotometry, scanning electron microscopy with energy dispersive x-ray spectroscopy, and particle size analysis using a Coulter counter.
Date: September 1, 1976
Creator: Brewer, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Defects in metal crystals. Progress report, May 1, 1975--April 30, 1976. [W--Re; Pt--Au; Mo--Ti]

Description: Emphasis was on use of different irradiating species (300-700 eV Xe/sup +/ ions, 20-30 keV W/sup +/ ions, 20-30 keV Mo/sup +/ ions, and fast neutrons) to introduce both vacancies and interstitials in Mo, W, Au, Pt--(Au), W--(Re), Mo(Ti), Ni/sub 4/Mo, and low-swelling and commercial 316 stainless steels. The following are reported: (A) an in-situ field-ion microscope study of ion-irradiated tungsten and tungsten alloys (W-Re) (recovery in Stages I and II); (B) a review of Stages I to IV of irrad… more
Date: February 1, 1976
Creator: Seidman, D. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Band magnetism due to f-electrons

Description: Specific heat data illustrate several types of itinerant or band magnetism in actinide intermetallic compounds. The results show ferromagnetic spin fluctuations in UAl/sub 2/ with T/sub sf/ equals 25K, itinerant antiferromagnetism in NpSn/sub 3/ with T/sub N/ equals 9.5K and itinerant ferromagnetism in NpOs/sub 2/ with T/sub C/ equals 7.9K. Specific heat studies of dilute U/sub 1-x/Th/sub x/Al/sub 2/ show the theoretically predicted modifications due to impurity scattering in a spin fluctuation… more
Date: January 1, 1976
Creator: Brodsky, M. B. & Trainor, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigation of LMFBR prototype 7A heaters and the metallurgy of the platinum-8 weight percent tungsten alloy

Description: A Liquid Metal Fast Breeder Reactor 7A prototype heater failure was analyzed. The failure was due to melting of the platinum-8 weight percent tungsten alloy (Pt-8 W) alloy winding caused by a loss of contact with the inside boron nitride insulation. An attempt to simulate a failure revealed that elemental boron forms a low-melting mixture with Pt-8 W, but a means by which boron might be present in an actual heater was not determined. A time/temperature/grain size study of various Pt-8 W alloy s… more
Date: September 1, 1976
Creator: Ludwig, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stage II recovery behavior of a series of ion-irradiated platinum (gold) alloys as studied by field-ion microscopy. [0. 10, 0. 62, and 4. 0 at. percent Au and pure Pt]

Description: Direct and visible evidence was obtained for long-range migration of self-interstitial atoms (SIAs) in Stage II of three different ion-irradiated platinum (gold) alloys. Field-ion microscope (FIM) specimens of Pt--0.10, 0.62 and 4.0 at. percent Au alloys were irradiated in-situ with 30-keV W/sup +/ or Pt/sup +/ ions at a tip temperature of 35 to 41 K at 2 x 10/sup -9/ torr. Direct observation of the surfaces of the FIM specimens during isochronal warming experiments to 100 K showed that a flux … more
Date: November 1, 1976
Creator: Wei, C. Y. & Seidman, D. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Integrity of /sup 252/Cf neutron sources after long-term service in normal and elevated temperature environments

Description: Effects of /sup 252/Cf radiations on capsule surfaces and other interactions of materials in industrial /sup 252/Cf neutron sources fabricated at the Savannah River Laboratory are being evaluated after long-term exposure of the sources in normal and elevated temperature environments. No major deterioration of platinum-alloy capsules containing /sup 252/Cf oxide or of stainless steel capsules containing /sup 252/Cf/sub 2/O/sub 3/-palladium cermet wires has been found under potential use conditio… more
Date: January 1, 1976
Creator: McDonell, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Impact properties and fabricability of thin-walled capsules of Pt--30% Rh--8% W

Description: Spherical shells of Pt3008 (Pt-30 percent Rh-8 percent W) with a wall thickness of 0.635 mm and a diameter of 40.7 mm were readily fabricated as capsules for 78 percent theoretically dense ThO/sub 2/ spheres. The spherical assemblies, encased in graphite, were impacted against granite at velocities of 76.2 to 89.5 m/sec. Because the ThO/sub 2/ was successfully contained by the Pt3008 at impact temperatures of 760, 1000, and 1250/sup 0/C, the alloy can be seriously considered as the container fo… more
Date: December 1, 1976
Creator: Inouye, H.; Heestand, R. L. & Liu, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Feasibility of electroplating platinum--iridium alloy out of fused chlorides

Description: The feasibility of plating platinum and platinum-iridium alloys out of molten chloride salts was tested. Electrolysis and cyclic voltammetry studies were made of the eutectic mixture of lithium chloride and potassium chloride with and without additions of potassium tetrachloroplatinite(II) (K/sub 2/PtCl/sub 4/) and potassium hexachloroiridite(III) (K/sub 3/IrCl/sub 6/). Platinum was deposited at 100 percent efficiency from melts containing it. The deposit was dendritic, coarsely crystalline, no… more
Date: August 1, 1976
Creator: Harding, W. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stage II recovery behavior of ion-irradiated Pt(Au) alloys. [35 to 40 K, 2. 10/sup -9/ torr; 30 keV W/sup +/ and Pt/sup +/; 0. 1, 0. 62, and 4. 0 at. % Au]

Description: Direct and visible evidence was obtained for long-range migration of self-interstitial atoms (SIAs) in Stage II of three different ion-irradiated platinum(gold) alloys (Pt/0.1 at% Au, Pt/0.62 at% Au and Pt/4.0 at% Au). Field-ion microscope (FIM) specimens of the alloys were irradiated in-situ with 30 keV W/sup +/ or Pt/sup +/ ions at a tip temperature of 35 to 40 K at approximately 2.10/sup -9/ torr. Direct observation of the surface of the FIM specimens during isochronal warming experiments to… more
Date: October 1, 1976
Creator: Wei, C. Y. & Seidman, D. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study of iridium and iridium--tungsten alloys for space radioisotopic heat sources. [Up to 4% W; fabrication; microstructure; tensile; oxidation; compatibility; fractures]

Description: The physical and mechanical properties of iridium and iridium-tungsten alloys containing up to 4% tungsten were evaluated as potential cladding materials in space isotopic heat sources. The iridium--tungsten alloys are readily fabricable and are compatible with graphite, low-pressure oxygen, and simulated heat source environments up to at least 1300/sup 0/C. The solubility of oxygen and carbon in the alloys appears to be quite low, at a level of 5 ppM for oxygen and 10 ppM for carbon up to 1300… more
Date: December 1, 1976
Creator: Liu, C. T. & Inouye, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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