Effect of Ceramic Content on the Compression Properties of TiB2-Ti2AlC/TiAl Composites

• Main Authors: Shili Shu, Cunzhu Tong, Feng Qiu, Qichuan Jiang
• Format: Article
• Language: English
• Published: MDPI AG 2015-11-01
• Series: Metals
• Subjects: TiAl; intermetallics; composite; compression properties
• Online Access: http://www.mdpi.com/2075-4701/5/4/2200

In situ synthesized TiB2-reinforced TiAl composites usually possess high strength. However, it is very expensive to use B powder to synthesize TiB2 particles. Moreover, the strength enhancement of TiB2/TiAl composite is generally at the cost of plasticity. In this study, in situ dual reinforcement TiB2-Ti2AlC/TiAl composites were fabricated by using B4C powder as the B and C source, which greatly reduces the potential production cost. The 6 vol. % TiB2-Ti2AlC/TiAl composite fabricated by using the Ti-Al-B4C system shows greatly improved compressive properties, i.e., 316 MPa and 234 MPa higher than those of TiAl alloy and with no sacrifice in plasticity.