Abstract
This review is done essentially to study results in the field of synthesis and characterization of Carbon Nanotubes (CNT’s) reinforced nanocomposite coatings using thermal sprayed coatings. CNT reinforced nanocomposite coatings produced by thermal spray process are being developed for a wide variety of applications, e.g. aerospace, automotive and sports equipment industries. It is anticipated that, if properly deposited, nanocomposite ceramic coatings could also provide improved properties like wear resistance and thermal barrier coatings. These results clearly demonstrate that the significant improvement in coating performance can be achieved by utilizing proper thermal sprayed nanocomposite coatings. Thermal sprayed nanocomposite coatings shows improvement of resistance to wear, erosion, corrosion and mechanical properties. The purpose of this paper is to review CNT reinforced nanocomposite coatings using thermal spray by various researchers.
Highlights
The materials having high strength to weight ratio is the need of the hour
If properly deposited, nanocomposite ceramic coatings could provide improved properties like wear resistance and thermal barrier coatings. These results clearly demonstrate that the significant improvement in coating performance can be achieved by utilizing proper thermal sprayed nanocomposite coatings
Nanoindentation shows a distribution in the elastic modulus values from 40– 229 GPa which is attributed to microstructural heterogeneity of the coatings that comprise the pure Al, Al–Si eutectic, porosity and Carbon nanotubes (CNTs)
Summary
The materials having high strength to weight ratio is the need of the hour. There are different techniques of fabricating Metal Matrix Composites to have tailor made properties depending on the particular application. Plasma spraying has been around for more than four decades and has been used to deposit a wide range of metals, ceramics and even composite materials for many different applications [2]. The researchers experience several discriminating applications by virtue of its remarkable mechanical, electrical and thermal properties [4,5,6,7,8,9] Depending on their length and diameter, chirality and orientations, carbon nanotubes exhibit almost five times elastic modulus (1TPa) and closely 100 times tensile strength (150 GPa) than those of high strength steels [10,11,12]. The nanosized carbon tubes provide superior dispersion strengthening to the composite structures
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