Micro-morphology and mechanical properties of carbon nanotubes-Ti<sub>3</sub>AlC<sub>2</sub>/AZ91D composites

SUN Wei; BAI Yuelei; ZHANG Qiang; LIU Yukun; ZHU Chuncheng

doi:10.13801/j.cnki.fhclxb.20191128.002

Volume 37 Issue 7

Aug. 2020

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Article Navigation > Acta Materiae Compositae Sinica > 2020 > 37(7): 1649-1656

SUN Wei, BAI Yuelei, ZHANG Qiang, et al. Micro-morphology and mechanical properties of carbon nanotubes-Ti3AlC2/AZ91D composites[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1649-1656. doi: 10.13801/j.cnki.fhclxb.20191128.002

Citation:

SUN Wei, BAI Yuelei, ZHANG Qiang, et al. Micro-morphology and mechanical properties of carbon nanotubes-Ti₃AlC₂/AZ91D composites[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1649-1656. doi: 10.13801/j.cnki.fhclxb.20191128.002

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Micro-morphology and mechanical properties of carbon nanotubes-Ti₃AlC₂/AZ91D composites

doi: 10.13801/j.cnki.fhclxb.20191128.002

SUN Wei^1
,,
BAI Yuelei^2
,,
ZHANG Qiang^1
,,
LIU Yukun^1
,,
ZHU Chuncheng^{1
,
,}

1.
School of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China
2.
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China

Received Date: 2019-08-27
Accepted Date: 2019-11-01

Available Online: 2019-11-28

Publish Date: 2020-07-15

Abstract

Abstract

Carbon nanotubes(CNTs) and Ti₃AlC₂ reinforced phase was surface modified by electroless copper plating. The CNTs-Ti₃AlC₂/AZ91D composites was prepared by hot pressing (HP) sintering. The microstructure, mechanical properties and strengthening mechanism of the CNTs-Ti₃AlC₂/AZ91D composites were studied.The results indicate that the main physical phases in the CNTs-Ti₃AlC₂/AZ91D composite are CNTs, Ti₃AlC₂, Mg and Al₁₂Mg₁₇, and the reinforced phase is uniformly distributed in the matrix. There is a U phase (MgAlCu) at the interface between the reinforced phase and the matrix, which can make the interface of the two well combined. When the reinforced phase content is CNTs (1wt%) and Ti₃AlC₂ (25wt%), compared with magnesium alloyAZ91D, the elasticity modulus, tensile strength, yield strength and elongation of the CNTs-Ti₃AlC₂/AZ91D composites are increased by 120.30%, 25.72%, 126.50% and 36.84%, respectively, and the flexural strength and compression strength are 337.92 MPa and 436.27 MPa. The fracture mode of the CNTs-Ti₃AlC₂/AZ91D composites is brittle fracture, and the strengthening mechanism is mainly thermal mismatch strengthening, Orowan strengthening and fine grain strengthening.
- hot pressing sintering,
- Ti₃AlC₂,
- carbon nanotubes(CNTs),
- copper plating,
- mechanical property,
- magnesium alloy
Long Abstrsct
Innovation Points

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References(22)

References

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