Isotec final report

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General Atomic (GA) developed processes to prepare NdSe/sub 1.5-x/. The partial pressure of Se/sub 2/ above the NdSe/sub 1.5-x/ was found to be a function of x. The thermoelectric properties and the friability of the hot pressed element were also a function of x. Process modification changed the value of x, providing a method to control the properties of N-type NdSe/sub 1.5-x/ elements. A method of joining NdSe/sub 1.5-x/ to a nickel hot cap was developed using a gold foil intermediate. NdSe/sub 1.5-x/ was diffusion-bonded to PbTe by the same process developed for Gd/sub 2/Se/sub 3/. Couples were fabricated from ... continued below

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Elsner, N.B.; Chin, J.; Reynolds, G.H.; Norman, J.H.; Bass, J.C. & Staley, H.G. November 1, 1981.

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General Atomic (GA) developed processes to prepare NdSe/sub 1.5-x/. The partial pressure of Se/sub 2/ above the NdSe/sub 1.5-x/ was found to be a function of x. The thermoelectric properties and the friability of the hot pressed element were also a function of x. Process modification changed the value of x, providing a method to control the properties of N-type NdSe/sub 1.5-x/ elements. A method of joining NdSe/sub 1.5-x/ to a nickel hot cap was developed using a gold foil intermediate. NdSe/sub 1.5-x/ was diffusion-bonded to PbTe by the same process developed for Gd/sub 2/Se/sub 3/. Couples were fabricated from (Cu,Ag)/sub 2/Se/Fe/(Bi,Sb)/sub 2/Te/sub 3/ and NdSe/sub 1.5-x/ PbTe elements. Limited couple test data were obtained. General Atomic examined methods to develop high-efficiency couples made from segmented elements containing (Cu,Ag)/sub 2/Se P-type material and NdSe/sub 1.5-x/ N-type material. Techniques were developed to reproducibly prepare and hot press (Cu,Ag)/sub 2/Se segments and elements with a metallurgically joined MoRe hot cap. This hot cap and a W-26/Re wire mesh used to make the hot cap junction were found to be stable in contact with (Cu,Ag)/sub 2/Se at 750/sup 0/C. Stability of (Cu,Ag)/sub 2/Se to current flow in a thermal gradient was examined. This report describes specifications for vapor suppression to improve the stability of P-type (Cu,Ag)/sub 2/Se in thermal gradient life tests and presents life test information on match-loaded (Cu,Ag)/sub 2/Se and (Cu,Ag)/sub 2/Se/Fe/(Bi,Sb)/sub 2/Te/sub 3/ elements.

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NTIS, PC A07/MF A01.

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  • Other: DE82015077
  • Report No.: GA-A-16584
  • Grant Number: AT03-76ET33004
  • DOI: 10.2172/5437033 | External Link
  • Office of Scientific & Technical Information Report Number: 5437033
  • Archival Resource Key: ark:/67531/metadc1066293

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Office of Scientific & Technical Information Technical Reports

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  • November 1, 1981

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 30, 2018, 12:23 p.m.

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Elsner, N.B.; Chin, J.; Reynolds, G.H.; Norman, J.H.; Bass, J.C. & Staley, H.G. Isotec final report, report, November 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1066293/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.