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Synthesis of Ti2SnC MAX Phase by Mechanical Activation and Melt Infiltration

Authors

  • Young Jae Kang,

    1. Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martensstr. 5, D-91058 Erlangen, (Germany)
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  • Tobias Fey,

    Corresponding author
    1. Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martensstr. 5, D-91058 Erlangen, (Germany)
    • Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martensstr. 5, D-91058 Erlangen, (Germany).
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  • Peter Greil

    1. Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martensstr. 5, D-91058 Erlangen, (Germany)
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  • Financial support from DFG Kosseleck program contract no. GR 961/32 is gratefully acknowledged.

Abstract

Ternary MAX phase Ti2SnC was synthesized by Sn-melt infiltration into a porous preform of sub-stoichiometric titanium carbide TiC0.5. Compared to synthesis starting from elemental Ti + C + Sn mixtures which require temperatures exceeding 1100 °C a significantly lower reaction temperature as low as 700 °C was observed in the TiC0.5 + Sn system. This reduction in reaction temperature is rationalized in terms of accumulation of microstrain and decrease of crystallite size upon ball milling of the Ti + C powder mixture. Dense compacts of Ti2SnC with only minor fractions of unreacted TiC0.5 were obtained at 1025 °C. Thus reactive solid–liquid processing at lower temperatures might be of relevance for MAX phase systems containing low melting A-elements such as Sn, In, Ga, Pb, etc. which tend to become unstable at elevated temperatures.

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