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SUMMARY:IN-SITU INVESTIGATION OF THERMO-STIMULATED DISSOLUTION OF HYDRIDES
  IN TITANIUM AND ZIRCONIUM BY MEANS OF SHORT-WAVE DIFFRACTION OF SYNCHROTR
 ON RADIATION
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260306T045048Z
UID:indico-contribution-1287@indico.inp.nsk.su
DESCRIPTION:Speakers: Roman Laptev (National Research Tomsk Polytechnic Un
 iversity)\nTitanium and zirconium alloys are widely used in medicine\, che
 mical and oil industries\, aircraft industry\, in nuclear power industry. 
 Hydrogen penetration and accumulation in titanium and zirconium products l
 ead to its properties and can lead to the delayed fracture due to the hydr
 ogen embrittlement [1-4].\n\n Degree of hydrogen impact on the titanium an
 d zirconium properties depends on its concentration and condition in metal
 . Hydrogen saluted in lattice has a low impact on properties of the metal.
  However\, hydrogenation under operation of titanium and zirconium alloys 
 often occurs with hydrides formation. As a consequence\, investigation of 
 hydrides formation and dissociation in titanium and zirconium has both fun
 damental and practical interest.\n\nSamples of commercially pure titanium 
 alloy and Zr1%Nb zirconium alloy were instigated in this work. Hydrogenati
 on was done by gas-phase method at temperature 600 °C and hydrogen pressu
 re 1 atm. Spectrum of hydrogen thermo-stimulated desorption from samples a
 fter hydrogenation were obtained with the help of automated complex Gas Re
 action Controller LPB with mass-spectrometer RGA100. \n\nIn situ diffracti
 on measurements were carried out in the process of samples heating at the 
 station "Precision diffractometry II» of the Institute of Catalysis of th
 e Siberian Branch of the Russian Academy of Science at the 6 synchrotron r
 adiation channel of the VEPP-3 electron storage ring. \n\nComparison of th
 e data obtained in the analysis of hydrogen desorption curves with data of
  the phase transitions in the zirconium-hydrogen and titanium-hydrogen sys
 tems at the heating allowed describing the processes occurring in zirconiu
 m and titanium hydrides under thermal treatment. \n\n1. C.P. Liang\, H.R. 
 Gong. Fundamental influence of hydrogen on various properties of alph-tita
 nium // International Journal of Hydrogen Energy 35 (2010) 3812-3816.\n2. 
 Madina V.\, Azkarate I. Compatibility of materials with hydrogen. Particul
 ar case: hydrogen embrittlement of titanium alloys // International Journa
 l of Hydrogen Energy. 2009. No. 34. P. 5976-5980.\n3. Silva K.-R.F.\, DosS
 antos D.S.\, Robeiro A.F.\, Almeida L.H. Hydrogen diffusivity and hydride 
 formation in rich-zirconium alloys used in nuclear reactors // Defect and 
 Diffusion Forum. 2010. Vol. 297- 301. P. 722-727.\n4. Zielinski A.\, Sobie
 szczyk S. Hydrogen-enhanced degradation and oxide effects in zirconium all
 oys for nuclear application // International Journal of Hydrogen Energy.  
 2011. Vol. 36. P. 8619-8629.\n\nhttps://indico.inp.nsk.su/event/3/contribu
 tions/1287/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1287/
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