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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Synthesis Of Ti3XC2 (X = Si, Al) By Pressureless Reactive Sintering
Xiao Yan1; Mark Pownceby2; Marshall Lanyon2;1THE UNIVERSITY OF QUEENSLAND, , Australia; 2CSIRO, Clayton, Australia;
Type of Paper: Regular
Id Paper: 305
Topic: 9
Abstract:
Ti3SiC2 and Ti3AlC2 ceramics in the form of polycrystalline bulks or powders were synthesized by pressureless reactive sintering. The synthesis of Ti3XC2 (X = Si or Al) was carried out in argon by the sintering of well mixed powder blends of 2TiC/1.2X/Ti at 1200-1450 °C for Ti3SiC2 or 1310-1370 °C for Ti3AlC2 over various reaction times. Combined characterization techniques including XRD, SEM-EDS, and EPMA were applied to study reaction kinetics and formation mechanisms of Ti3XC2. This study revealed that the sintering temperature had a more profound effect on the reaction kinetics than the time. The mechanisms of formation of Ti3XC2 are proposed. Moreover, Ti3SixAl(1-x)C2 solid solutions (0 < x < 1) were also synthesized at 1370 °C from 3TiC/xSi/(1-x)Al/Ti powder blends directly and the prepared Ti3SiC2 and Ti3AlC2 powders. The lattice parameters of a unit cell of the synthesized Ti3SixAl(1-x)C2 solid solutions were measured and compared with available reported data.