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A Hf–Al–C composite composed of Hf 3 Al 3 C 5 , Hf 2 Al 4 C 5 and Hf 3 Al 4 C 6 has been successfully synthesized by a hot pressing method; its microstructure and mechanical and thermal properties were systematically characterized. Hf–Al–C composite conserves the high hardness and stiffness similar to HfC. Interestingly, the composite...
In the present study we investigate the evolution of the microstructure of a 12% Cr tempered martensite ferritic steel under conditions of long-term aging and creep (823K, 120MPa, t R =139,971h). We show how subgrains coarsen, that the close correlation between carbides and subgrain boundaries loosens during long-term creep and that the frequency of small-angle boundaries increases. All these...
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