NDLI: Understanding the dielectric and mechanical properties of self-passivated Al

Content Provider	IET Digital Library
Author	Chillu, Naresh Jayaganthan, Rengaswamy Danikas, Michael G. Tanaka, Toshikatsu Sarathi, Ramanujam
Abstract	Epoxy nano passivated aluminium composites with optimised size and filler contents were fabricated. Variation in contact angle and surface roughness is insignificant with increasing filler into nanocomposites but it showed a drastic reduction on corona ageing. Water droplet initiated corona inception voltage (CIV) is high under the negative DC voltage followed with positive DC and AC voltages. The bandwidth of ultra-high frequency signal generated due to water droplet initiated corona discharge lies in the range of 0.5–1.2 GHz. Surface potential measurements have shown that the decay in the potential was fast initially, and it became slower and sluggish subsequently. The trap energy density versus trap depth plot exhibits shallow traps and deep traps at around 0.8 and 0.87 eV, respectively. Permittivity, conductivity and loss factor have increased with an increase in the filler content in nanocomposites. The bulk resistance and capacitance of samples were determined for obtaining the equivalent parallel RC circuit model. Incorporation of nanofillers increases the glass transition temperature and reduces the tan δ with increasing frequencies as evident from dynamic mechanical analysis studies. A direct correlation is observed between the plasma temperature measured through laser-induced breakdown spectroscopy spectra and hardness of the material.
Starting Page	1336
Ending Page	1344
Page Count	9
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 9, Nov (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2019.0144
Journal	IET Science, Measurement & Technology
Publisher Date	2019-09-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Aluminium Angle of Contact Brittleness Bulk Resistance Capacitance Composite Insulating Materials Contact Angle Corona Corona Ageing Corona Discharge Corona-aged Specimen Cracks Deep Traps Dielectric Breakdown And Discharges Dielectric Loss Dielectric Loss And Relaxation Dielectric Permittivity Dielectric Property Drops Dynamic Mechanical Analysis Electrical Conductivity Electrical Resistivity Embrittlement Epoxy Nanopassivated Aluminium CompoSite Equivalent Parallel RC Circuit Model Fatigue Filled Polymers Filler Content Fluid Surface Energy Fracture Frequency 0.5 GHz to 1.2 GHz Glass Transition Glass Transition Temperature Glass Transitions Hardness Insulation And Insulating Coatings Interface Tension Laser-induced Breakdown Spectroscopy Loss Factor Mechanical Property Nanocomposite Nanofillers Nanomechanics Negative DC Voltage Optimised Size Photonic Technology Plasma Temperature Polymer-based CompoSite Positive DC Voltage Preparation of Reinforced Polymers RC Circuit Resins Self-passivated Al-epoxy Nanocomposite Solid Surface Structure Surface Potential Surface Potential Measurement Surface Resistance Measurement Surface Tension Trap Energy Density-trap Depth Plot UHF Signal Water Droplet Initiated Corona Inception Voltage
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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