In situ synthesis of paper-derived Ti 3 SiC 2
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Mylena Mayara Matias Carrijo Department of Material Science, Institute of Glass and Ceramics, University of Erlangen-Nuremberg, Erlangen 91058, Germany; and Graduate Program on Materials Science and Engineering, Federal University of Santa Catarina (UFSC), Florianópolis 88040-900, SC, Brazil
Carlos R. Rambo Graduate Program on Materials Science and Engineering, Federal University of Santa Catarina (UFSC), Florianópolis 88040-900, SC, Brazil; and Department of Electrical and Electronic Engineering, Federal University of Santa Catarina (UFSC), Florianópolis 88040-900, SC, Brazil
Peter Greil and Nahum Travitzky Department of Material Science, Institute of Glass and Ceramics, University of Erlangen-Nuremberg, Erlangen 91058, Germany (Received 30 January 2017; accepted 28 March 2017)
A novel approach based on the preceramic paper method was used for the fabrication of Ti3SiC2-based material. Elemental powders of Ti, TiC, Si, C, and organic additives were used as starting materials. The Rapid Köthen process was used to fabricate the preceramic papers. The high-loaded green body of preceramic papers was heat-treated up to varying temperatures of 1300, 1400, 1500, and 1600 °C for 1 h in an Ar atmosphere. By using an excess amount of Si powder in the basic composition, the amount of Ti3SiC2 in the sintered specimen could be increased while the amount of TiC could be reduced. X-ray analysis showed that the paper-derived sample with the basic powder composition 3Ti/3TiC/3Si/C was a single phase within the resolution limit of the instrument used. The high purity of Ti3SiC2 can be explained by the partial formation of amorphous C which could not be detected by X-ray diffraction. Scanning electron microscopy analysis of fracture surfaces showed the characteristic lamellar structure of the paper-derived MAX phase.
I. INTRODUCTION
Titanium silicon carbide (Ti3SiC2) is a well-studied compound among the nanolaminated Mn11AXn ternary compounds and exhibits a unique combination of both ceramic and metallic properties. For instance, it has a good thermal shock resistance, high thermal and electrical conductivity, high chemical and oxidation resistance, easy machinability, low hardness, high stiffness, and high Young’s modulus.1–5 Therefore, it has often been considered as a promising material for high-temperature applications. The synthesis and fabrication of Ti3SiC2 materials have been achieved by a number of techniques.1,3,4,6–8 The in situ preparation of Ti3SiC2 materials was carried Contributing Editor: Xiaowei Yin a) Address all correspondence to this author. e-mail: [email protected] b) This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/. DOI: 10.1557/jmr.2017.132
out by hot isostatic pressing (HIP),9 chemical vapor deposition (CVD),10–12 hot pressing (HP),13,14 mechanical alloying (MA),15,16 pressure less sintering (PS),17 reactive sintering (RS),18 physical v
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