Paper Title:
Corrosion Behavior of Si3N4 Ceramics under High-Temperature and High-Pressure Water Condition
  Abstract

Silicon nitride (Si3N4) ceramics have been considered for various components of nuclear power plants such as mechanical seal of reactor coolant pump (RCP), guide roller for control rod drive mechanism (CRDM), and seal support, etc. Corrosion behavior of Si3N4 ceramics in high-temperature and high-pressure water must be elucidated before they can be considered for components of nuclear power plants. In this study, the corrosion behaviors of Si3N4 ceramics at hydrothermal condition (300°C, 9.0 MPa) were investigated in pure water. The grain-boundary phase was preferentially corroded and the corrosion reaction was controlled by the diffusion of the reactive species and/or products through the corroded layer. Results of this study imply that the variation of sintering aids and/or the control (e.g., crystallization) of the grain-boundary phase are necessary to increase the corrosion resistance of Si3N4 ceramics in high-temperature water.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
259-262
DOI
10.4028/www.scientific.net/AMR.26-28.259
Citation
W. J. Kim, S. M. Kang, J. Y. Park, "Corrosion Behavior of Si3N4 Ceramics under High-Temperature and High-Pressure Water Condition", Advanced Materials Research, Vols. 26-28, pp. 259-262, 2007
Online since
October 2007
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Price
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