Evaluation of the sinterability,densification behaviour and microhardness of spark plasma sintered multiwall carbon nanotubes reinforced Ti6Al4V nanocomposites |
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| Affiliation: | 1. Centre for Nanoengineering and Tribocorrosion, Department of Metallurgy, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, South Africa;2. Council for Scientific and Industrial Research, Pretoria, South Africa;1. Centre for Nanomechanics and Tribocorrosion, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, Johannesburg, South Africa;2. Department of Materials Science and Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria;1. Center for Advanced Research and Technology and Department of Materials Science and Engineering, University of North Texas, Denton 76203, USA;2. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, IL 60439, USA;3. Materials and Manufacturing Directorate, Air Force Research laboratory, Dayton, OH 45433, USA;4. CMT Structural and Functional Metals Lab, GE Global Research Center-Niskayuna, NY 12309, USA;1. Institute for NanoEngineering Research, Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa;2. Department of Chemical Engineering Technology, University of Johannesburg, Johannesburg, South Africa;1. School of Mechanical Engineering, Sichuan University, Chengdu, Sichuan, 610065, PR China;2. Key Laboratory of Power Beam Processing, AVIC Manufacturing Technology Institute, Beijing, 100024, PR China;3. School of Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT, UK;1. Centre for Nanoengineering and Tribocorrosion, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, South Africa;2. Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa;3. Department of Engineering Metallurgy, University of Johannesburg, Doornfontein Campus, Doornfontein, Johannesburg, South Africa;1. College of Materials Science and Metallurgical Engineering, Guizhou University, China;2. Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials, China;3. National & Local Joint Engineering Laboratory for High-Performance Metal Structure Materials and Advanced Manufacturing Technology, China |
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| Abstract: | Structural and industrial demands for lightweight engineering materials with exclusive properties have been rising in recent decades for automobile and aerospace applications. This has encouraged various innovations in materials engineering communities to synthesis advanced engineering materials using improved fabrication technique such as spark plasma sintering (SPS). In this study, titanium-based nanocomposites were synthesized by reinforcing Ti6Al4V reinforced with (0.5, 1.0 and 1.5 wt%) multiwall carbon nanotubes (MWCNT) powders. The starting powders were blended by shift-speed ball milling. Thereafter, SPS technique was used to consolidate the admixed powders by employing the following sintering parameters; sintering rate, 100 °C/min, compressive pressure, 50 MPa, holding time, 10 min and sintering temperatures of 900–1100 °C. The influence of MWCNT additions on the sinterability, densification behaviours and microhardness of the sintered nanocomposites were investigated. The results revealed that the densification of the sintered nanocomposites was in the range of 97.51–99.61% which decreased with an increase in concentration of the MWCNT. Meanwhile, the densification and microhardness improved tremendously with an increase in sintering temperatures. |
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| Keywords: | Multiwall carbon nanotubes Titanium alloys Densification behaviours Sinterability Microhardness |
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