Synthesis Zr-Co-Y based chemical getter and evaluation its vacuum preserving, sorption characteristics, and hydrogen absorption

Document Type: Research Paper

Authors

Department of Advanced Materials and Renewable Energies, Iranian Research Organization for Science and Technology, Tehran, Iran

10.22104/ijhfc.2020.1614.1199

Abstract

In this research, a Zr-Co based chemical non-evaporable getter (NEG) was synthesized via mechanical alloying. A mixture with a 75 %Wt. Zr, 22 %Wt. Co, and 3 %Wt. Y composition (Zr75Co22Y3) was selected, mixed, and milled up to 42 h. The obtained powder was pressed in a tablet form. The sample was placed in a well-sealed vacuum chamber that was evacuated to 1.5×10-5 mmHg. Then, the sample was subjected to different heat treatments (at various temperatures and times) for activation. Results revealed that the final vacuum for the Y36030 sample (Zr75Co22Y3 activated at 360ºC for 30 min) and the Y28030 sample (Zr75Co22Y3 activated at 280 ⁰C for 30 min) were 5.95×10-6 and 9.9×10-6 mmHg, respectively. After finishing the heat treatment, vacuum variation versus time was recorded in the range of 0.001-0.2 mmHg, the time for Y36030, Y28030, and a no-getter was 3088, 510, and 345 seconds, respectively. Sievert results showed that Y36030 absorbed 1.5 %Wt H2 at 45 bar while Y28030 absorbed 1.05 %Wt. H2. After removing the pressure, the remaining amount of hydrogen for Y36030 and Y28030 was 0.7 and 0.55 %Wt., respectively.

Keywords

Main Subjects


  1. Xu Y., Cui J., Cui H., Zhou H., Yang Zh., Jun Du, “ZrCoCe getter film solution under controlled atmosphere for MEMS packaging”, International Conference on Advances in Energy, (AEECE-2015) China, 2015.
  2. SAES Getter, Technical Report, "St 707 Non-Evaporable Getters Activatable at Low Temperatures".https://psec.uchicago.edu/getters/St%20707%20,
  3. Benvenuti C., Chiggiato P., "Obtention of pressures in the 10−14 Torr range by means of a Zr-V-Fe non evaporable getter". Vacuum, 1993. 44: 511.
  4. Benvenuti C., Chiggiato P., "Pumping Characteristics of the St707 Nonevaporable Getter (Zr 70 V 24.6-Fe 5.4 wt %)". J. of Vacuum Science & Technology, 1996. 14: 3278.
  5. Riabova A.B., Yartys V. A., Fjellvag H., Haubackb B.C., Sørbyb M.H., "Neutron diffraction studies of Zr-containing intermetallic hydrides with ordered hydrogen sublattice.: V. Orthorhombic Zr3Co6.9D with filled Re3B-type structure", J. of Alloys and Compounds, 2000. 296: 312.
  6. Heidary Moghadam A., Dashtizad V., Kaflou A., Yoozbashizadeh H., "Effect of rare earth elements on sorption characteristics of nanostructured Zr-Co sintered porous getters", J. of Vacuum, 2015, 111: 9.
  7. Zhang H., Su R., Chen D., Shi L., "Thermal desorption behaviors of helium in Zr-Co films prepared by sputtering deposition method", J. of Vacuum, 2016, 130: 174.
  8. Konishi S., Nagasaki T., Yokogawa N., Naruse Y., "Development of zirconium–cobalt beds for recovery, storage and supply of tritium", J. of Fusion Engineering and Design, 1989, 10: 355.
  9. Penzhorn R.D., Devillers M., Sirch M., "Evaluation of ZrCo and other getters for Tritium handling and storage". J. of Nuclear Materials, 1990, 170: 217.
  10. Zavaliy I.Yu., Denys R.V., erný R. Cˇ, Koval’chuck I.V., Wiesinger G., Hilscher G., "Hydrogen-induced changes in crystal structure and magnetic properties of the Zr3MOx (M = Fe, Co) phases". J. of Alloys and Compounds, 2005, 386: 26.
  11. Xu Y., Cui J., Cui H., Zhou H., Yang Zh., Du J., "Influence of deposition pressure, substrate temperature and substrate outgassing on sorption properties of Zr-Co-Ce getter films". J. of Alloys and Compounds, 2016, 661: 396.
  12. Bu J.G., Mao C.H., Zhang Y., Wei X.Y., Du J., "Preparation and sorption characteristics of Zr–Co–RE getter films". J. of Alloys and Compounds, 2012, 529: 69.
  13. Valdre`G., Zacchini D., Berti R., Costa A., Alessandrini A., Zucchetti P., Valdre U., "Nitrogen sorption tests, SEM-windowless EDS and XRD analysis of mechanically alloyed nanocrystalline getter materials", J. of Nanostructured Materials, 1999, 11(6): p: 821.
  14. Neelima B., Rama Rao N.V., Rangadhara V., Pandian S., "Influence of mechanical milling on structure, particle size, morphology and magnetic properties of rare earth free permanent magnetic Zr2Co11 alloy". J. of Alloys and Compounds, 2016, 661:72.
  15. Sakintuna B., Lamari-Darkrim F., Hirscher M., "Metal hydride materials for solid hydrogen storage: A review", International J. of Hydrogen Energy, 2007, 32: 1121.
  16. Gregg S.J., Sing K.S.W., "Adsorption, surface area and porosity". London: Academic Press; 1982.
  17. Fattahzade. M, Kaflou. A, Dashtizad V., "Study the Effect of Praseodymium and Neodymium on Adsorption Properties for Active Gases in Non-Evaporable Zr-Co Base Chemical Getter and Comparing with Yttrium", J. of Advanced Materials and Technologies, 2018, 7: 55.
  18. Huaqin Kou W.L., Huang Zh., Sang G., Hu Ch., Chen Ch., Zhang G., Luo D., Liu M., Zheng Sh., "Effects of temperature and hydrogen pressure on the activation behavior of ZrCo", International J. of Hydrogen Energy, 2016. 41: 10811.
  19. Matolin V., Drbohlav J., Masek K. , "Mechanism of non-evaporable getter activation, XPS and static SIMS study of Zr44V56 alloy", J. of Vacuum, 2003, 71: 317.
  20. Batra I.S., Singh R.N., Sengupta P., Maji B.C., Madangopal K., Manikrishna K.V., Tewari R., Dey G.K., "Mitigation of hydride embrittlement of zirconium by yttrium". J. of Nuclear Materials, 2009, 389: 500.
  21. Heidary Moghadam A., Dashtizad V., Kaflou A., Yoozbashizadeh H., Ashiri R., Development of a nanostructured Zr3Co intermetallic getter powder with enhanced pumping characteristics, J. of Intermetallics. 2015, 57: 51.
  22. Petti, D., Cantoni. M., Leone M., Bertacco R., Rizzi E., Activation of Zr–Co–rare earth getter films: An XPS study, Applied Surface Science, 2010, 256: 6291.
  23. Dwight A.E., Klippert T.E., Variants of Zr3Co and their superconducting critical temperatures. Materials Research Bulletin, 1978. 13: 595.
  24. Bereznitsky M., Jacob I., Bloch J., Mintz M. H., Thermodynamic and structural aspects of hydrogen absorption in the Zr(AlxFe1−x)2 system. J. of Alloys and Compounds, 2003, 351: 180.
  25. Fisher.P.W., Tanase M., Diffusivities of hydrogen in yttrium and yttrium alloys. J. of Nuclear Materials, 1984, 122 : 1536.
  26. Hara M., Okabe T., Mori K., Watanabe K., Kinetics and mechanism of hydrogen-induced disproportionation of ZrCo. Fusion Engineering and Design, 2000, 49-50: p: 831.
  27. Szpunar J. A., Qin W., Li H., Kiran Kumar N.A.P., Roles of texture in controlling oxidation, hydrogen ingress and hydride formation in Zr alloys, J. of Nuclear Materials, 2012, 427:343.
  28. Buschow K.H.J., Bouten P.C.P., Miedema A.R., Hydrides formed from intermetallic compounds of two transition metals: a special class of ternary alloys, J. of Physics. 1982, 45:937.
  29. Sandrock G., A panoramic overview of hydrogen storage alloys from a gas reaction point of view, J. of Alloy and Compounds, 1999, 293:877.
  30. Zhang T., Zhang Y., Zhang M., Hu R., Kou H., Li J., Xue X., Hydrogen absorption behavior of Zr-based getter materials with Pd-Ag coating against gaseous impurities. International J. of Hydrogen Energy, 2016, 41: 14778.
  31. Asse-Coutrin N., Altenor S., Cossement D., Jean-Marius C., Gaspard S., Comparison of parameters calculated from the BET and Freundlich isotherms obtained by nitrogen adsorption on activated carbons: a new method for calculating the specific surface area. Microporous and Mesoporous Materials, 2008. 111: 517.
  32. Altin O., Özbelge HÖ., Dogu T., Effect of pH in an aqueous medium on the surface area, pore size distribution, density, and porosity of montmorillonite, J. of Colloid and Interface Science 1999, 217:19.
  33. Simon C. A., Scandium, Yttrium & the Lanthanides: Inorganic & Coordination Chemistry, https://doi.org/10.1002/9781119951438.eibc0195
  34. Tejland P., Andren H.O., Origin and effect of lateral cracks in oxide scales formed on zirconium alloys. J. of Nuclear Materials, 2012, 430: 64.
  35. Martin M., Gommel C., Borkhart C., Fromm E., Absorption and desorption kinetics of hydrogen storage alloys. J. of Alloys and Compounds, 1996, 238: 193.
  36. Benvenuti C., Chiggiato P., Pinto P.C., Vacuum properties of TiZrV non-evaporable getter films, Vacuum, 2001, 60: 57.
  37. Bakker H., Bonzel H.P., Bruff C.M., Dayananda M.A., Gust W., Horvath J., Kaur I., Kidson G.V., LeClaire A.D., Mehrer H., Murch G.E., Neumann G., Stolica N., Stolwijk, Diffusion in solid metals and alloys. Condensed Matter, 1990, 26.