Synthesis of Ti2SnC MAX Phase by Mechanical Activation and Melt Infiltration

✍ Scribed by Young Jae Kang; Tobias Fey; Peter Greil

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 677 KB
• Volume: 14
• Category: Article
• ISSN: 1438-1656
• DOI: 10.1002/adem.201100186

✦ Synopsis

Abstract

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.