Journal
MATERIALS CHARACTERIZATION
Volume 178, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2021.111298
Keywords
Al matrix composite; Reaction process; Mechanical properties; Ti3AlC2; Al3Ti
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Funding
- National Science Foundation of China (NSFC) [51871011, 51301013, 51572017]
- Beijing Government Funds for the Constructive Project of Central Universities
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A novel Ti3AlC2-Al3Ti/Al composite was fabricated by hot pressing Ti3AlC2 and pure Al powders, forming a strong interfacial bonding. The mechanical properties of the composite were significantly enhanced, mainly attributed to load transfer strengthening, thermal mismatch strengthening, and dispersion strengthening mechanisms.
A novel Ti3AlC2- Al3Ti/Al composite was fabricated by hot pressing Ti3AlC2 and pure Al powders. One strong interfacial bonding appeared due to the formation of Al3Ti phase between Ti3AlC2 and Al observed by HRTEM. Flexural strength, compressive strength, compressive yield strength and Vickers hardness of 30 vol% Ti3AlC2 reinforced Al composite were measured to be 398 +/- 5 MPa, 404 +/- 17 MPa, 359 +/- 12 MPa, and 1.91 +/- 0.01 GPa, respectively. Transgranular fracture behavior occurred in unreacted Ti3AlC2 particles in bending test, while no interfacial debonding was observed. The enhancement of mechanical properties were attributed to the load transfer strengthening, thermal mismatch strengthening and dispersion strengthening mechanism.
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