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https://www.ias.ac.in/article/fulltext/boms/039/05/1259-1262

Metal–matrix composites; mechanical properties; microstructures; sintering.

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.

TAOTAO AI¹ QI YU¹ WENHU LI¹ XIANGYU ZOU¹ ZHIFENG DENG¹ XINQIANG YUAN¹

1. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China

Manuscript received

21 September 2015

Accepted

23 February 2016