PROCESS OF FABRICATING NANO-SURFACE
COATING AND METHODS
OF TESTING THEIR PROPERTIES
Veereshgouda S.N.
12GAMB4017
M.E....
The beginning..
contents
• Nano coatings : what and why?
• Materials used
-Small Case study- titanium dioxide
• Classification of nano...
Coating
Nanocoating
• Nanocoating are coating that produced by usage of some
components at nanoscale to obtain desired propertie...
 Titanium dioxide is hydrophilic due
to its high surface energy, hence
water does not form drops on a
surface coated w...
Photo catalytic TiO2
absorbs UV radiation from
sunlight/fluorescent lamps
Produce pairs of
electrons and
holes.
Elec...
Classification of
Coating
Properties
Functional
Coating
Self- Assembled
Nanophase
Coating
FUNCTIONAL COATING
The term ‘functional coatings’ describes systems which represent other than
the classical properties ...
• Functional coatings perform by means of physical, chemical, mechanical and
thermal properties.
• Chemically active fun...
Self Assembly
• Under specific
conditions, some
materials can
spontaneously
assemble into
organized structures.
Thi...
SNAP Coating System
Preparation of SNAP (Self-Assembled Nanophase
Protection)
SOL-GEL PROCESS
Hydrolysis Condensation
SNAP SOLUTION MIXING...
Fig. Schematic representation of sol-gel process of synthesis of nano-materials
SNAP Procedures
1. SNAP solutions were prepared by drop-wise addition of 42.8 ml
glycidoxypropyltrimethoxysilane (GPTMS)...
CONVENTIONAL CLASSIFICATION
Chemical vapour deposition-CVD
• Atomic layer
epitaxy
• Plasma-
Enhanced CVD
• Electrost...
Physical vapour deposition-PVD
• PVD is a process of transferring growth species from a source or
target and deposit the...
Evaporation
Sputtering
• Sputtering is to use energetic ions to knock atoms or molecules
out from a target that acts as one electrod...
Dip coating
Plastic dip coating
Dipping Wet layer
formation
Solvent
evaporation
Stages of the dip coating process: d...
Coating technique
Processing or coating for organic
coating
Spray coating
Refurbished ion-beam-sputterer
• Fast cycling Coater for
SiO2, TiO2, Ta2O5
• For multi-layers and
mixtures
Nano-coati...
Processing for inorganic and hard coating
• Conductive nanocoating on textiles
 atomic layer deposition(VCD)
Refurbished ion-beam-sputterer
Exchangeable twin target holder
Kaufman-type ion beam sputter system
in a class 100 clea...
Implantable Materials - Coatings
For: Catheters, heart valves, artificial hips
Implants confuse the cells responsible fo...
P-h curve
• Indentor used: Berkovich diamond indenter
– 3 sided pyramidal shape
– Tip radius 50-100nm
• We plot P-h curve
• We use H= hardness of indentor,
– In conventional tests A is the projected area at
maximum load
...
References
• G. Cao, Nanomaterials, Imperial college press
• J. Malzbender et al Measuring mechnical
properties of Coat...
To end my presentation..
THANKS TO:
• My Family- For Providing Resources Like Laptop, Money Etc.
• You all- for being here and listening to me wi...
Nanocoatings and Nanoindentation
Nanocoatings and Nanoindentation
Nanocoatings and Nanoindentation
Nanocoatings and Nanoindentation
Nanocoatings and Nanoindentation
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Nanocoatings and Nanoindentation

THIS PPT SHORTLY DEALS WITH CONCEPTS OF NANOCOATINGS AND NANOINDENTATION
Published on: Mar 3, 2016
Published in: Technology      
Source: www.slideshare.net


Transcripts - Nanocoatings and Nanoindentation

  • 1. PROCESS OF FABRICATING NANO-SURFACE COATING AND METHODS OF TESTING THEIR PROPERTIES Veereshgouda S.N. 12GAMB4017 M.E. Adv. Materials Tech. U.V.C.E., BANGALORE
  • 2. The beginning..
  • 3. contents • Nano coatings : what and why? • Materials used -Small Case study- titanium dioxide • Classification of nanocoatings. • Different Processes used. • Case study: coating of Bio-Implants • Testing of nanocoating
  • 4. Coating
  • 5. Nanocoating • Nanocoating are coating that produced by usage of some components at nanoscale to obtain desired properties. • Nanocoatings can be categorized as nanocrystalline, multilayer coatings with individual layer thickness of nanometers. • Nanostructured coatings offer great potential for various applications due to their superior characteristics that are not typically found in conventional coatings.
  • 6.  Titanium dioxide is hydrophilic due to its high surface energy, hence water does not form drops on a surface coated with it, film instead.
  • 7. Photo catalytic TiO2 absorbs UV radiation from sunlight/fluorescent lamps Produce pairs of electrons and holes. Electron of the valence band of titanium dioxide becomes excited when illuminated by light. The excess energy of this excited electron promoted the electron to the conduction band of titanium dioxide therefore creating the negative-electron (e-) and positive-hole (h+) pair. The positive-hole of TiO2 breaks apart the water molecule to form hydrogen gas and hydroxyl radical. The negative-electron reacts with oxygen molecule to form super oxide anion. (Both known as photo-produced radicals) These photo-produced radicals are powerful oxidizing species and can cause the deterioration of organic contaminants or microbials pieces on the particle surface. MECHANISM of Self-cleaning photocatalytic nanotitanium dioxide (TiO2)
  • 8. Classification of Coating Properties Functional Coating Self- Assembled Nanophase Coating
  • 9. FUNCTIONAL COATING The term ‘functional coatings’ describes systems which represent other than the classical properties of a coating (decoration and protection). Functional coating come up with additional functionality. This functionality depend upon the actual application of a coated substrate. Examples of functional coating Expectations of functional coatings Self-cleaning Easy-to clean (anti-graffiti) Antifouling Soft feel Antibacterial Durability Reproducibility Easy application and cost effectiveness Tailored surface morphology Environmental friendliness
  • 10. • Functional coatings perform by means of physical, chemical, mechanical and thermal properties. • Chemically active functional coatings perform their activities either at: – Film–substrate interfaces (anticorrosive coatings), – In the bulk of the film (fire-retardant or intumescent coatings) – Air–film interfaces (antibacterial, self-cleaning) Air/ Film interfaces properties Bulk film properties Film/ substrate interface properties
  • 11. Self Assembly • Under specific conditions, some materials can spontaneously assemble into organized structures. This process provides a useful means for manipulating matter at the nanoscale. http://nimet.ufl.edu/nanomed.asp
  • 12. SNAP Coating System
  • 13. Preparation of SNAP (Self-Assembled Nanophase Protection) SOL-GEL PROCESS Hydrolysis Condensation SNAP SOLUTION MIXING Cross-linking agent Surfactant COATING APPLICATION Dip coating
  • 14. Fig. Schematic representation of sol-gel process of synthesis of nano-materials
  • 15. SNAP Procedures 1. SNAP solutions were prepared by drop-wise addition of 42.8 ml glycidoxypropyltrimethoxysilane (GPTMS) and 8.9 ml tetramethoxysilane (TMOS) to 64.8 ml solution of 0.05 M acetic acid in doubly distilled deionized (DDI) water. 2. The application solutions were prepared by diluting the aged SNAP solution with water and subsequent addition of a crosslinking agent (DETA) and surfactant. 3. The final mixture was vigorously stirred and applied to the cleaned aluminum alloy panels by dip-coating.
  • 16. CONVENTIONAL CLASSIFICATION Chemical vapour deposition-CVD • Atomic layer epitaxy • Plasma- Enhanced CVD • Electrostatic spray assisted vapour deposition Physical vapour deposition-PVD • Electron beam physical vapor deposition • Sputter deposition • Vacuum deposition • Cathodic arc deposition(Arc- PVD) • ION BEAM SPUTTERING TECHNIQUE. • Molecular Beam epitaxy SPRAYING • High velocity oxygen fuel( HOVF) • Plasma spraying • Arc spray Chemical and electrochemical • Plating • Electroplating • Electroless plating • Solgel process • Anodizing
  • 17. Physical vapour deposition-PVD • PVD is a process of transferring growth species from a source or target and deposit them on a substrate to form a film. • The process proceeds atomistically and mostly involves no chemical reactions. • In general, those methods can be divided into two groups: evaporation and sputtering. – In evaporation, the growth species are removed from the source by thermal means. – In sputtering, atoms or molecules are dislodged from solid target through impact of gaseous ions (plasma). • Each group can be further divided into a number of methods, depending on specific techniques applied to activate the source or target atoms or molecules and the deposition conditions applied.
  • 18. Evaporation
  • 19. Sputtering • Sputtering is to use energetic ions to knock atoms or molecules out from a target that acts as one electrode and subsequently deposit them on a substrate acting as another electrode
  • 20. Dip coating Plastic dip coating Dipping Wet layer formation Solvent evaporation Stages of the dip coating process: dipping of the substrate into the coating solution, coating of substrate (wet layer ) by solvent evaporation
  • 21. Coating technique Processing or coating for organic coating Spray coating
  • 22. Refurbished ion-beam-sputterer • Fast cycling Coater for SiO2, TiO2, Ta2O5 • For multi-layers and mixtures Nano-coatings the thought and the actions- Riccardo DeSalvo, Shiuh Chao et al. - National Tsing Hua University in Taiwan
  • 23. Processing for inorganic and hard coating • Conductive nanocoating on textiles  atomic layer deposition(VCD)
  • 24. Refurbished ion-beam-sputterer Exchangeable twin target holder Kaufman-type ion beam sputter system in a class 100 clean compartment within a class 10,000 clean room Previously used to develop low-loss mirror coatings for ring-laser gyroscope Sputter target and rotator Kaufman ion gun and neutrali2z5er
  • 25. Implantable Materials - Coatings For: Catheters, heart valves, artificial hips Implants confuse the cells responsible for tissue regeneration and causes the body to react as if it had encountered foreign material. The body's natural response to foreign material is to wall it off with scar-like tissue. This reaction can disrupt device performance. Nanocoatings in the exact shape of specific proteins can protect devices from such disruptions. © 2003 by Glenn Fishbine
  • 26. P-h curve
  • 27. • Indentor used: Berkovich diamond indenter – 3 sided pyramidal shape – Tip radius 50-100nm
  • 28. • We plot P-h curve • We use H= hardness of indentor, – In conventional tests A is the projected area at maximum load – In nano-indentation A is area function
  • 29. References • G. Cao, Nanomaterials, Imperial college press • J. Malzbender et al Measuring mechnical properties of Coatings, Reports, Elsevier Imprints.
  • 30. To end my presentation..
  • 31. THANKS TO: • My Family- For Providing Resources Like Laptop, Money Etc. • You all- for being here and listening to me with patience. • Last but not the least- The GOOGLE and student and research community across the world for providing knowledge and content for free access.

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