ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Silicon nitride (Si3N4) ceramics have been considered for various components of nuclearpower plants such as mechanical seal of reactor coolant pump (RCP), guide roller for control roddrive mechanism (CRDM), and seal support, etc. Corrosion behavior of Si3N4 ceramics inhigh-temperature and high-pressure water must be elucidated before they can be considered forcomponents of nuclear power plants. In this study, the corrosion behaviors of Si3N4 ceramics athydrothermal condition (300°C, 9.0 MPa) were investigated in pure water. The grain-boundary phasewas preferentially corroded and the corrosion reaction was controlled by the diffusion of the reactivespecies and/or products through the corroded layer. Results of this study imply that the variation ofsintering aids and/or the control (e.g., crystallization) of the grain-boundary phase are necessary toincrease the corrosion resistance of Si3N4 ceramics in high-temperature water
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.259.pdf
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