Thermal sprayed stainless steel/carbon nanotube composite coatings

Stainless steel/carbon nanotube (SS/CNT) composite coating was prepared by thermal spray from the feedstock powder synthesized by chemical vapor deposition at a synthesis temperature and time of 800°C and 120min under ethanol atmosphere. Microstructural investigation by TEM and SEM revealed that gro...

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Bibliographic Details
Published in:Surface & coatings technology 2010-12, Vol.205 (7), p.2104-2112
Main Authors: Kaewsai, D., Watcharapasorn, A., Singjai, P., Wirojanupatump, S., Niranatlumpong, P., Jiansirisomboon, S.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotubes
Chemical vapor deposition
CNT thermal spray
Coating
Coatings
Composite coatings
Cross-disciplinary physics: materials science
rheology
Ethyl alcohol
Exact sciences and technology
Materials science
Metals. Metallurgy
Microstructure
Nanocomposite
Physics
Production techniques
Reduction
Stainless steel
Stainless steels
Surface treatment
Surface treatments
Temperature
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Summary:Stainless steel/carbon nanotube (SS/CNT) composite coating was prepared by thermal spray from the feedstock powder synthesized by chemical vapor deposition at a synthesis temperature and time of 800°C and 120min under ethanol atmosphere. Microstructural investigation by TEM and SEM revealed that grown CNTs covering the surface of stainless steel particles were multi-walled type with an average diameter of about 44nm. Microstructures of pure stainless steel and SS/CNT composite coatings similarly showed splat characteristic and lamellar structure. Incorporation of CNTs was clearly observed in the composite coating. Hardness of SS/CNT composite coating (480±36 HV0.3) was higher than that of pure stainless steel coating (303±33 HV0.3). Coefficient of friction of the SS/CNT coating was almost 3 times lower than that of stainless steel coating which resulted in reduction of sliding wear rate of nearly 2 times. This research thus demonstrated a new composite coating with better wear resistive performance compared to a coating deposited by commercially available stainless steel powder.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2010.08.113