NDLI: Carbon Transfer in Sodium System Under Thermal Cycling-Possibility of “Metal Dusting”

Content Provider	Springer Nature Link
Author	Rajendran Pillai, S.
Copyright Year	2010
Abstract	High temperature sodium systems encounter thermal cycling during operation. Under this condition, the behavior of carbon dissolved in sodium needs special attention. Carbon chemistry of sodium is very complex because of the existence of multiple carbon-bearing species. In addition, carbon exists both in the dissolved (“active”) and undissolved (“inactive”) forms. Under thermal cycling conditions, as the temperature is lowered, carbon may precipitate as sodium acetylide. The equilibrium carbon activity imparted by this species is high enough to cause the precipitation of iron carbide (Fe$_{3}$C) in ferrous alloys. The Fe$_{3}$C may be destabilized at lower activities of carbon in the environment (when the temperature is increased) and may decompose to a fine dispersion of metal and graphite. This phenomenon of “metal dusting” is extremely detrimental to the components of sodium systems. The article analyses the possibility of “metal dusting” in an operating sodium system.
Starting Page	1140
Ending Page	1143
Page Count	4
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	20
Issue Number	7
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2010-10-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbon activity high temperature sodium iron carbide metal dusting sodium acetylide thermal cycling Engineering Design Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Materials Science Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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