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Tailoring ultrafine grained and dispersion-strengthened Ti$_2$AlC/TiAl composite via a new fabrication route
TAOTAO AI QI YU WENHU LI XIANGYU ZOU ZHIFENG DENG XINQIANG YUAN
Volume 39 Issue 5 September 2016 pp 1259-1262
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https://www.ias.ac.in/article/fulltext/boms/039/05/1259-1262 -
Keywords
Metal–matrix composites ;mechanical properties ;microstructures ;sintering. -
Abstract
In situ Ti$_2$AlC/TiAl composite was fabricated by hot-pressing method via the reaction system of Ti$_3$AlC$_2$ and Ti-Al pre-alloyed powders at low temperature of 1150$^{\circ}$C. The composite mainly consisted of TiAl, Ti$_3$Al and Ti$_2$AlC phases. Fine Ti$_2$AlC particles were homogeneously distributed and dispersed in the matrix. Ti$_2$AlC played the significant role of deflecting and blunting the cracks and contributed to improve the mechanical properties of the composite. The Vickers hardness, flexural strength and fracture toughness were 6.2 GPa, $993.9\pm 50.8$ MPa and $6.7\pm 0.3$ MPa m$^{1/2}$, respectively.
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Author Affiliations
TAOTAO AI1 QI YU1 WENHU LI1 XIANGYU ZOU1 ZHIFENG DENG1 XINQIANG YUAN1
- School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China
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Dates
- Published
- 15 September 2016
- Manuscript received
- 21 September 2015
- Accepted
- 23 February 2016
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