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Synthesis of Ti 2 SnC MAX Phase by Mechanical Activation and Melt Infiltration
Author(s) -
Kang Young Jae,
Fey Tobias,
Greil Peter
Publication year - 2012
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201100186
Subject(s) - materials science , crystallite , stoichiometry , max phases , ternary operation , titanium , ball mill , infiltration (hvac) , porosity , carbide , titanium carbide , phase (matter) , chemical engineering , metallurgy , composite material , chemistry , organic chemistry , computer science , engineering , programming language
Ternary MAX phase Ti 2 SnC was synthesized by Sn‐melt infiltration into a porous preform of sub‐stoichiometric titanium carbide TiC 0.5 . 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 TiC 0.5 + 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 Ti 2 SnC with only minor fractions of unreacted TiC 0.5 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.