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Synthesis of Copper-Based Multi-Walled Carbon Nanotube Composites

K. Domagała M. Borlaf D. Kata T. Graule

Archives of Metallurgy and Materials | 2020 | vol. 65 | No 1 | 157-162 | DOI: 10.24425/amm.2019.131109

Keywords MWCNT water treatment copper cuprous oxide cupric oxide

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Abstract

In this study, the synthesis of copper-based multi-walled carbon nanotube composites is described. Over the last years, carbon nanotubes (CNTs) have been widely used in many scientific research fields and have found applications in several sectors, e.g. for water treatment. This work focuses on combining the exceptional characteristics of CNTs, such as high specific surface area and antibacterial properties, with the antimicrobial/ antivirus features of copper oxides. The influence of synthesis parameters and thermal treatment on the final product was studied. Copper leakage was evaluated at both pH 5 and pH 7, confirming the possibility of applying Cu-based MWCNT composites in water filtration systems.

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Authors and Affiliations

K. Domagała

M. Borlaf

D. Kata

T. Graule

Evaluation of the Possibility to Improve the Scratch Resistance of the AZ91 Alloy by Applying a Coating

Marek Mróz Sylwia Olszewska Patryk Rąb

Archives of Foundry Engineering | 2023 | vol. 23 | No 4 | 157-162 | DOI: 10.24425/afe.2023.146690

Keywords AZ91 magnesium alloy WCCoCr coating Microstructure Scratch test

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Abstract

This paper presents the possibility of improving the scratch resistance of the AZ91 magnesium alloy by applying a WCCoCr coating using the Air Plasma Spraying (APS) method. The coating thickness ranged from 140 to 160 m. Microstructural studies of the AZ91 magnesium alloy were performed. The chemical composition of the WCCoCr powder was investigated. The quality of the bond at the substrate–coating interface was assessed and a microanalysis of the chemical composition of the coating was conducted. The scratch resistance of the AZ91 alloy and the WCCoCr coating was determined. The scratch resistance of the WCCoCr powder-based coating is much higher than the AZ91 alloy, as confirmed by scratch geometry measurements. The scratch width in the coating was almost three times smaller compared to the scratch in the substrate. Observations of the substrate–coating interface in the scratch area indicate no discontinuities. The absence of microcracks and delamination at the transition of the scratch from the substrate to the coating indicates good adhesion. On the basis of the study, it was found that there was great potential to use the WCCoCr powder coating to improve the abrasion resistance of castings made from the AZ91 alloy.

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Bibliography

[1] Wanhill, R.J.H. (2017). Carbon fibre polymer matrix structural composites. Aerospace Materials and Material Technologies. 1, 309-341. https://doi.org/10.1007/978-981-10-2134-3_14.
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[4] Wang, G.G. & Weiler, J.P. (2023). Recent developments in high pressure die-cast magnesium alloys for automotive and future applications. Journal of Magnesium and Alloys. 11(1), 78 87. DOI: doi.org/10.1016/j.jma.2022.10.001.
[5] Liu, B., Yang, J., Zhang, X., Yang, Q., Zhang, J., Li, X. (2022). Development and application of magnesium alloy parts for automotive OEMs: A review. Journal of Magnesium and Alloys. 11(1), 15-47. DOI: 10.1016/j.jma.2022.12.015.
[6] Janik, B. (2011). Application of magnesium alloys in aviation. Prace Instytutu Lotnictwa. 57(221), 102-108. (in Polish).
[7] Prasad, S.V.S., Prasad, S.B., Verma, K., Mishra, R.K., Kumar, V. & Singh, S. (2021). The role and significance of Magnesium in modern day research – A review. Journal of Magnesium and alloys. 10(1), 1-61. DOI: 10.1016/j.jma.2021.05.012.
[8] Blawert, C., Hort, N. & Kainer, K.U. (2004). Automotive applications of magnesium and its alloys. Transaction of the Indian Institute of Metals. 57(4), 397-408.
[9] Chen, H. & Alpas A.T. (2000). Sliding wear map for the magnesium alloy Mg-9Al-0.9Zn (AZ91). Wear. 246(1-2), 106-116. DOI: 10.1016/S0043-1648(00)00495-6.
[10] Walczak, M., Caban, J. & Pliżga, P. (2015). Tribological characteristic of magnesium alloys used in means of transport. TTS Technika Transportu Szynowego. 22(12), 1614-1617.
[11] Parco, M., Zhao, L., Zwick, J., Bobzin, K. & Lugscheider, E. (2007). Investigation of particle flattening behaviour and bonding mechanisms of APS sprayed coatings on magnesium alloys. Surface and Coating Technology. 201(14), 6290-6296. DOI: 10.1016/j.surfcoat.2006.11.034.
[12] Morelli, S., Rombol`a, G., Bolelli, G., Lopresti, M., Puddu, P, Boccaleri, E., Seralessandri, L., Palin, L., Testa, V., Milanesio, M. & Lusvarghi, L. (2022). Hard ultralight systems by thermal spray deposition of WC-CoCr onto AZ31 magnesium alloy. Surface and Coating Technology. 451, 129056 1-26. DOI.org/10.1016/j.surfcoat.2022.129056.
[13] Gray, J.E. & Luan, B. (2002). Protective coatings on magnesium and its alloys – a critical review. Journal of Allys and Compounds. 336(1-2), 88-113. DOI: 10.1016/S0925 8388(01)01899-0.

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Authors and Affiliations

Marek Mróz

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Sylwia Olszewska

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Patryk Rąb

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Rzeszow University of Technology, Poland

Microstructure Evolution Through Cryogenic Rolling of Ultra-High Purity Titanium Produced by Electron Beam Melting

Ui Jun Ko Byoung Jun Han Kyoung-Tae Park Marzieh Ebrahimian Jh Kim

Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 157-162 | DOI: 10.24425/amm.2024.147805

Keywords Pure titanium Cryogenic roll simulation modeling

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Abstract

In this study, crystal grain refinement of pure titanium manufactured by electron beam melting through cryogenic rolling was performed. The effect of rolling in a cryogenic atmosphere on average grain size was investigated. Cryogenic atmosphere rolling was confirmed to be smaller than normal temperature rolling. Electron back scatter diffraction (EBSD) confirmed the presence of oriented crystal grains in the material. The deformation, temperature, and stress generated during rolling were calculated using 3D simulation. Finite element analysis (FEM) modeling was used to analyze the trend of average grain size change during the heat treatment of the rolled samples.

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Authors and Affiliations

Ui Jun Ko

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Byoung Jun Han

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Kyoung-Tae Park

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Marzieh Ebrahimian

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Jh Kim

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ORCID:

Hanbat National University, Department of Materials Science and Engineering, Yuseong-gu, Daejeon 34158, Republic of Korea
RareMetal R&D Group, Korea Institute of Industrial Technology, 12, Gaetbeol-ro, Yeonsu-gu, Incheon, 21999, Republic of Korea

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Synthesis of Copper-Based Multi-Walled Carbon Nanotube Composites

Abstract

Authors and Affiliations

Evaluation of the Possibility to Improve the Scratch Resistance of the AZ91 Alloy by Applying a Coating

Abstract

Bibliography

Authors and Affiliations

Microstructure Evolution Through Cryogenic Rolling of Ultra-High Purity Titanium Produced by Electron Beam Melting

Abstract

Authors and Affiliations