skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water

Abstract

The effect of the variation of the dissolved hydrogen concentration on the oxide phase transformation under high-temperature hydrogenated water conditions was investigated using in situ Raman spectroscopy. The Raman spectrum in 50 cm(3)/kg of dissolved hydrogen concentration indicated the formation of monoclinic and tetragonal zirconium oxide at the water-substrate interface. As the dissolved hydrogen concentration decreased to 30 cm(3)/kg, the Raman peaks corresponding to the zirconium oxide phase changed, indicating an oxide phase transformation. And, the results of SEM and TEM analyses were compared with those of in situ analyses obtained for the oxide structure formed on the zirconium alloy.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1244718
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Corrosion Science; Journal Volume: 99
Country of Publication:
United States
Language:
English

Citation Formats

Kim, Taeho, Kim, Jongjin, Choi, Kyoung Joon, Yoo, Seung Chang, Kim, Seung Hyun, and Kim, Ji Hyun. Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water. United States: N. p., 2015. Web. doi:10.1016/j.corsci.2015.06.034.
Kim, Taeho, Kim, Jongjin, Choi, Kyoung Joon, Yoo, Seung Chang, Kim, Seung Hyun, & Kim, Ji Hyun. Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water. United States. doi:10.1016/j.corsci.2015.06.034.
Kim, Taeho, Kim, Jongjin, Choi, Kyoung Joon, Yoo, Seung Chang, Kim, Seung Hyun, and Kim, Ji Hyun. Thu . "Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water". United States. doi:10.1016/j.corsci.2015.06.034.
@article{osti_1244718,
title = {Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water},
author = {Kim, Taeho and Kim, Jongjin and Choi, Kyoung Joon and Yoo, Seung Chang and Kim, Seung Hyun and Kim, Ji Hyun},
abstractNote = {The effect of the variation of the dissolved hydrogen concentration on the oxide phase transformation under high-temperature hydrogenated water conditions was investigated using in situ Raman spectroscopy. The Raman spectrum in 50 cm(3)/kg of dissolved hydrogen concentration indicated the formation of monoclinic and tetragonal zirconium oxide at the water-substrate interface. As the dissolved hydrogen concentration decreased to 30 cm(3)/kg, the Raman peaks corresponding to the zirconium oxide phase changed, indicating an oxide phase transformation. And, the results of SEM and TEM analyses were compared with those of in situ analyses obtained for the oxide structure formed on the zirconium alloy.},
doi = {10.1016/j.corsci.2015.06.034},
journal = {Corrosion Science},
number = ,
volume = 99,
place = {United States},
year = {Thu Jul 23 00:00:00 EDT 2015},
month = {Thu Jul 23 00:00:00 EDT 2015}
}
  • High-resolution microscopy of a high-purity Ni-5Cr alloy exposed to 360°C hydrogenated water reveals intergranular selective oxidation of Cr accompanied by local Cr depletion and diffusion-induced grain boundary migration (DIGM). The corrosion-product oxide consists of a porous, interconnected network of Cr2O3 platelets with no further O ingress into the metal ahead. Extensive grain boundary depletion of Cr (to <0.05at.%) is observed typically 20–100 nm wide as a result of DIGM and reaching depths of many micrometers beyond the oxidation front.
  • Monoclinic zirconia was pressed to approximates 20,000 atm at >1800 deg C, quenched, fired for 1 hr at 1350 deg C, and quenched. X-ray diffraction patterns were obtained while quenching was repeated through the phase transformation temperature range 800 to 1240 deg C; the results show that the new monoclinic-tetragonal phase transformation is shifted to 950 to 1000 deg C and that the tetragonal phase is stabilized at low temperitures. (D.L.C.)
  • A new microporous zirconosilicate K{sub 2}ZrSi{sub 3}O{sub 9}.2H{sub 2}O (AV-15) has been prepared by high-temperature phase transformation at 910 {sup o}C. Its structure has been determined ab initio from powder X-ray diffraction data. The unit cell is orthorhombic, space group C222{sub 1} (no. 20), Z=4 with cell dimensions: a=8.105(3), b=10.684(5), c=12.030(5) A, V=1041.76(7) A{sup 3}. The framework connection of AV-15 is essentially the same as the previously reported sodium stannosilicate AV-10 while the locations of potassium and water molecules in the former are quite different from those of the sodium and water molecules in AV-10. In AV-10 sodium and watermore » molecules form a sinucoidal chain, while potassium and water molecules build up a linear chain in AV-15. The water molecules in AV-15 are lost on heating with a typical zeolitic behaviour. SEM shows that the particle sizes and habits of AV-15 and parent umbite material are the same. The {sup 29}Si MAS NMR spectrum of AV-15 displays two resonances at ca. -89.4 and -90.1 ppm in a 1:2 intensity ratio. Thermogravimetry analysis confirms the existence of water in this material. -- Graphical abstract: A new microporous zirconosilicate has been prepared by high temperature phase transformation at 910 {sup o}C. Its structure has been determined ab initio from powder X-ray diffraction data. The water molecules in this material are lost below 125 {sup o}C in a way typical of zeolites and molecular sieves. Display Omitted« less
  • The TiNiHf alloys are newly developed as high temperature shape memory alloys with the high transformation temperatures and with lower cost in comparison with TiNiX (X = Pd, Pt) alloys. Until now, no results about the effects of aging at high temperature (above 953K) in the TiNiHf alloys are reported. The purpose of the present work is to investigate the microstructure, transformation temperature, mechanical properties and shape memory effects (SMEs) for Ti{sub 36}Ni{sub 49}Hf{sub 15} alloy aged at 973K for different hours by transmission electron microscopy (TEM), X-ray diffraction (XRD) techniques, electrical resistance-temperature measurement, bending and tensile tests.