tailieunhanh - Nickel-based multiwalled carbon nanotube composite coatings

This paper presents results of preparing and examining characteristics of the Nickel electrodeposition coatings containing MWCNTs (Ni-MWCNTs). The Ni-MWCNTs composite coatings deposited on a steel plate with the area of dm2 using bipolar pulses at 470 Hz and 50oC in a 5-liter bath. | Vietnam Journal of Science and Technology 56 (3B) (2018) 144-151 NICKEL-BASED MULTIWALLED CARBON NANOTUBE COMPOSITE COATINGS Bui Hung Thang1, *, Nguyen Xuan Toan3, Nguyen Viet Phuong1, Tran Van Hau1, Nguyen Thi Hong4, Nguyen Ngoc Trac4, Vu Dinh Lam1, 3, and Phan Ngoc Minh1, 2, 3, * 1 Institute of Materials Sciences, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 2 Center for High Technology Development, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 3 Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 4 Hue Industrial College, Ministry of Industry and Trade, 70 Nguyen Hue Street, Hue City * Email: thangbh@, pnminh@ Received: 12 July 2018; Accepted for publication: 7 September 2018 ABSTRACT Carbon nanotubes (CNTs) have been widely known as nanomaterials with excellent mechanical properties. Previous studies reported that the tensile strength of multi-walled carbon nanotubes (MWCNTs) was up to 63 GPa and single-walled carbon nanotubes (SWCNTs) could reach 150 GPa while the highest tensile strength of the steel was found to be about GPa. SWCNTs could have Young’s modulus up to 1000 GPa that was much greater than the value of 209 GPa of steel. Therefore, there is a great potential to utilize CNTs as reinforced materials for composites in general and Ni electrodeposition coating in particular to improve hardness, durability, corrosion, and other physical and mechanical properties. This paper presents results of preparing and examining characteristics of the Nickel electrodeposition coatings containing MWCNTs (Ni-MWCNTs). The Ni-MWCNTs composite coatings deposited on a steel plate with the area of dm2 using bipolar pulses at 470 Hz and 50oC in a 5-liter bath. Amount of CNTs varying from 1 g/l to 3 g/l was dispersed into the solution by using surfactants and ultrasonic vibration. CNTs used in the study was MWCNTs diameters in the range from 20 to 90 nanometers and few micrometers in length. The SEM, EDS, .