TITLE

A review of refractory materials for vapor-anode AMTEC cells

AUTHOR(S)
King, Jeffrey C.; El-Genk, M. S.
PUB. DATE
January 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 504 Issue 1, p1391
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recently, refractory alloys have been considered as structural materials for vapor-anode Alkali Metal Thermal-to-Electric Conversion (AMTEC) cells, for extended (7–15 years) space missions. This paper reviewed the existing database for refractory metals and alloys of potential use as structural materials for vapor-anode sodium AMTEC cells. In addition to requiring that the vapor pressure of the material be below 10[sup -9] torr (133 nPa) at a typical hot side temperature of 1200 K, other screening considerations were: (a) low thermal conductivity, low thermal radiation emissivity, and low linear thermal expansion coefficient; (b) low ductile-to-brittle transition temperature, high yield and rupture strengths and high strength-to-density ratio; and (c) good compatibility with the sodium AMTEC operating environment, including high corrosion resistance to sodium in both the liquid and vapor phases. Nb-1Zr (niobium-1% zirconium) alloy is recommended for the hot end structures of the cell. The niobium alloy C-103, which contains the oxygen gettering elements zirconium and hafnium as well as titanium, is recommended for the colder cell structure. This alloy is stronger and less thermally conductive than Nb-1Zr, and its use in the cell wall reduces parasitic heat losses by conduction to the condenser. The molybdenum alloy Mo-44.5Re (molybdenum-44.5% rhenium) is also recommended as a possible alternative for both structures if known problems with oxygen pick up and embrittlement of the niobium alloys proves to be intractable. © 2000 American Institute of Physics.
ACCESSION #
5985197

 

Related Articles

  • Investigation of molybdenum-44.5%rhenium as cell wall material in an AMTEC based space power system. Kramer, Daniel P.; Ruhkamp, Joe D.; McNeil, Dennis C.; Howell, Edwin I.; Williams, Melvin K.; McDougal, James R.; Booher, Robert A. // AIP Conference Proceedings;2000, Vol. 504 Issue 1, p1402 

    A new generation of radioisotope space power systems based on AMTEC (Alkali Metal Thermal to Electrical Conversion) technology is presently being developed. The future application of this technology, as the electrical power system for outer planet deep space missions, is ultimately dependent on...

  • Superalloys.  // Foundry Management & Technology;Jan1995, Vol. 123 Issue 1, pA-9 

    Discusses various aspects of superalloys. Description of properties; Applications; Classification; Microstructural variables; Manufacturing processes.

  • Refractory metals conference. Bryskin, Boris D. // Advanced Materials & Processes;Jul98, Vol. 154 Issue 1, p53 

    Highlights the 1997 international conference on refractory metals. Powder-shaping concepts; Tungsten and molybdenum; Tantalum texture; Powder fabrication; Particle characterization.

  • Superalloys resist hot corrosion and oxidation. Erickson, Gary L. // Advanced Materials & Processes;Mar1997, Vol. 151 Issue 3, p27 

    Presents a discussion on superalloys. Alloy design and manufacture; Mechanical, foundry, heat treatment and environmental properties; Results of hot corrosion and oxidation tests.

  • Experimental and theoretical study of the optical properties of crystalline and amorphous TiSi... Antonov, V.N.; Kudryavtsev, Yu. V. // Low Temperature Physics;Mar1997, Vol. 23 Issue 3, p241 

    Focuses on the optical properties of amorphous and polycrystalline refractory metal silicides. Structures in the optical conductivity spectrum of the sample; Theoretical spectra obtained within the local-density approximation using the semirelativistic linear-muffin-tin-orbital method.

  • Advancement in Atomistic Modeling and Materials Processing of Refractory Metals. Sakidja, R. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Nov2013, Vol. 65 Issue 11, p1472 

    An introduction is presented to theoretical articles within the issue which focus on the use of atomistic modeling to examine the thermodynamic and chemical properties of refractory metals and alloys.

  • Study of superalloy topography during ultrahigh intensity nanosecond ultraviolet laser ablation. Wu, Qihong; Jie, Jiansheng; Ma, Yurong; Yu, Qingxuan; Miao, Bin; Wang, Guanzhong; Liao, Yuan; Fang, Rongchuan; Chen, Xiangli; Wang, Kelvin // Journal of Applied Physics;5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p6761 

    We report on the topography of holes ablated by an ultrahigh intensity 355 and 266 nm laser with 8 ns pulse width in Ni-base superalloy Inconel 718. The origin of droplets, micropores, and microcracks on the surface of hole is identified. Qualitative differences in the characteristics of...

  • SANS examination of precipitate microstructure in the creep-exposed single-crystal Ni-base superalloy SC16. Strunz, P.; Schumacher, G.; Chen, W.; Mukherji, D.; Gilles, R.; Wiedenmann, A. // Applied Physics A: Materials Science & Processing;Dec2002 Supplement, Vol. 74 Issue 6, ps1083 

    The evolution of γ'-precipitate morphology in the creep-exposed, single-crystal, Ni-base superalloy SC16 was studied by small-angle neutron scattering (SANS). The scattering curves observed show that the originally cuboidal precipitates become more rounded in the initial period. On further...

  • Photographic Images on Refractory Metals. Shaw, Marilyn // Metalsmith;Summer1984, Vol. 4 Issue 3, p32 

    The article offers step-by-step instructions for transferring images to refractory metals.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics