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High Temperature Hydro Corrosion Resistance of Silica Based Oxide Ceramics

[+] Author Affiliations
Shunkichi Ueno, Naoki Kondo, D. Doni Jayaseelan, Tatsuki Ohji, Shuzo Kanzaki

National Institute of Advanced Industrial Science and Technology, Nagoya, Aichi, Japan

Paper No. GT2003-38878, pp. 625-632; 8 pages
doi:10.1115/GT2003-38878
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 1: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3684-3 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

Water vapor corrosion behavior of Ln2 Si2 O7 (Ln = Nd, Er, Lu), mullite, CaYb4 Si3 O13 and Al2 O3 were investigated at 1500°C. In Ln2 Si2 O7 phases, Ln = Nd and Er samples were completely dissolved in water vapor environment. CaYb4 Si3 O13 phase underwent decomposition during the corrosion test. Lu2 Si2 O7 and mullite showed excellent water vapor corrosion protection. In the case of mullite, Al2 O3 rich phase was formed on the surface and the corrosion progression was successfully protected. In the case of Lu2 Si2 O7 phase, phase transition occurred and the grain boundaries of surface layer were slightly corroded by the corrosion test.

Copyright © 2003 by ASME

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