ISSN:
1662-9752
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:
During long-term thermal exposure, the degeneration of primary MC carbide is adiffusion-controlled process. With the element exchange between the primary MC carbide and the γmatrix, three MC degeneration reactions, that is, γ + MC → γ' + M23C6 (Reaction I), MC + γ →η+M23C6 (Reaction II) and MC + γ →η+ M6C (Reaction III), sequentially operates. Of them Reaction IIIhas never been reported in the previous references and is kinetically most difficulty. It is also shownthat the grain boundary MC decomposes much more rapidly than the grain interior MC and thatReaction III is not as often seen at the grain boundary as in the grain interior
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1301.pdf
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