Microstructural Evolution and Mechanical Properties of Multiwall Carbon Nanotubes Reinforced Titanium-Based Nanocomposites Developed by Spark Plasma Sintering

Avwerosuoghene Moses Okoro; Ronald Machaka; Senzeni Sipho Lephuthing; Mary Ajimegoh Awotunde; Peter Apata Olubambi

doi:10.1007/s12540-020-00774-x

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자료유형: 학술저널

저자정보: Avwerosuoghene Moses Okoro (University of Johannesburg) Ronald Machaka (Council for Scientific and Industrial Research) Senzeni Sipho Lephuthing (University of Johannesburg) Mary Ajimegoh Awotunde (University of Johannesburg) Peter Apata Olubambi (University of Johannesburg)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11

발행연도: 2021.11

수록면: 4,869 - 4,885 (17page)

DOI: 10.1007/s12540-020-00774-x

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In this study, the role of multiwall carbon nanotubes (MWCNT) on the microstructural evolution and mechanical propertiesof Ti6Al4V-based composites was investigated. This was conducted by dispersing different concentrations (0.5, 1.0 and1.5 wt%) of MWCNT into the Ti6Al4V matrix using shift-speed ball milling technique. Thereafter, the Ti6Al4V and thenanocomposites were consolidated via the spark plasma sintering technique. Various characterization techniques; scanningelectron microscopy (SEM), transmission electron microscopy (TEM) and light microscopy were conducted to understandthe microstructural evolution of the samples after the dispersion and sintering process. Subsequently, micromechanical andnanoindentation was carried out to reveal the mechanical properties of the fabricated samples. The morphological examinationusing SEM and TEM revealed the dispersibility of MWCNT dispersed within the Ti6Al4V matrix. Besides, the selectedarea diffraction and the fast Fourier Transform pattern demonstrated that the increase in concentration of the MWCNTexposed the nanotubes to adverse stresses during the dispersion process. Furthermore, the incorporation and increase inconcentration of the MWCNT in the titanium alloy resulted in microstructural and phase changes, which translate to tremendousimprovements in microhardness, nanohardness and elastic modulus up to 46.9%, 150.8%, and 169.5% respectively.

#Microstructural evolution #Mechanical properties #Titanium alloy #Multiwall carbon nanotubes #Spark plasma sintering

참고문헌 (59)

참고문헌 신청

Khurram S. Munir / 2017 / Microstructure and mechanical properties of carbon nanotubes reinforced titanium matrix composites fabricated via spark plasma sintering / Materials Science and Engineering: A 688:505~523

R. S. Ruof / 2003 / Mechanical properties of carbon nanotubes : theoretical predictions and experimental measurements / Comptes Rendus Phys 4:993~1008

E.W. Wong / 1997 / Nanobeam mechanics:elasticity, strength, and toughness of nanorods and nanotubes / Science 80(277):1971~1975

S. Berber / 2000 / Unusually high thermal conductivity of carbon nanotubes / Phys. Rev. Lett 84:4613

T. W. Ebbesen / 1996 / Electrical conductivity of individual carbon nanotubes / Nature 382:54

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