Plasma Jet Applications by 8CuFyj

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									Plasma Jets
   Fred Pacifico
 Rebecca Shipman

    ELEC-6750
     Dr. Tzeng
    Spring 2004
              Objectives
 Questions
 Acronyms
 Background and
  Development
 Physical Properties
 Different Types of
  Plasma Jets           Emerging Construction Technologies, Plasma Arc Torch Technology.
                        http://www.new-technologies.org/ECT/Civil/plasma1.htm

 A Plasma Jet
  Application
             Questions

 What are two advantages of using
 atmospheric plasma over low pressure
 plasma jets?

 Why is the binding energy increased
 with a plasma jet application?
                                             Acronyms
 RF-CCP (Radio Frequency Coupled Plasma )
 ICP (Inductively Coupled Plasma)
 CMP (Microwave Capacitively Coupled
  Plasma) **
 MIP (Microwave Induced Plasma)
 PET (Polyethylene terephthalate)

** Emil Cordos, Tiberiu Frentiu, Ana-Maria Rusu, Sorin Angel, Alpar Fodor, Michaela Ponta, Analytical Characterization of a
Capacitively Coupled Plasma Torch with a Central Tube Electrode, Talanta 48 827–837, 1999
         Acronyms (cont.)


 XPS (Photoelectron
 Spectroscopy)




                       http://www.tmd.ac.jp/i-mde/www/org/equipments.html
                             Acronyms (cont.)
 AFM (Atomic Forces                                            Topography of
  Microscopy)                                                       polyvinylalcohol




                                                               http://www.witec.de/pdf/mercury/mercuryflyer.pdf
                                                               (Acquired with the Mercury 100 AFM. Courtesy of
                                                               G. Haugstad, Univ. of Minneapolis)



 http://www.che.utoledo.edu/nadarajah/webpages/whatsafm.html
                            Background
 Development
   Vortex-stabilized plasma torch
   Water-stabilized arc
   Gas and vapor-stabilized medium
                      LaserStrobe image of powder
                      injection into water stabilized
                      plasma plume.


                                      LaserStrobe image of powder
                                      injection into gas-stabilized
                                      plasma plume.


   J.A. Brogan, C.C. Berndt, W.C. Smith, R.V. Gansert, S. Raghu, S. Sampath, and H. Herman.Particle Velocity
   Measurements. Journal of Thermal Spray Technology (1995), http://www.controlvisioninc.com/rtitech.html
                                  Physical Principles

     Parts of the Arc
     Cathode
     Anode
     Arc Column
          (Thermal Plasma)


M. Noeske, J. Degenhardt, S. Strudthoff, U. Lommatzsch, "Plasma jet treatment of five polymers at atmospheric pressure: surface," International Journal of
Adhesion & Adhesives 24, (2004) 171-177
                                              The Arc
 Electric
  Discharges in Gas
 DC and AC Arcs
 Electrode
  Materials
   Carbon (graphite)
   Metal
 The Stabilized Arc

    T. Iwao, T. Inaba, “Plasma length on characteristics of DC argon plasma torch arc,” in Vacuum 65 (2002), pp 299-304
                                   The Cathode

 Current Flow
 Electrons’ Kinetic Energy and
  Collisions with Neutral Atoms
 Positive Ions Heat Cathode Surface
 Common Materials


 B. Gross, B. Grycz, K. Miklossy, Plasma Technology. New York, NY: American Elsevier Publishing Company, Inc, 1969, pp232-273.
                                       The Anode

  Transition of Current
  Heated by Electrons
  Extreme Temperatures
  Current Density and Increased
       Current in the Arc


B. Gross, B. Grycz, K. Miklossy, Plasma Technology. New York, NY: American Elsevier Publishing Company, Inc, 1969, pp232-273.
                                       Arc Column
   Electric Field Gradient
     Type of gas
     Pressure
     Electrode material
     Cooling of the arc
     External mechanical and
      magnetic forces
   Arc Voltage
B. Gross, B. Grycz, K. Miklossy, Plasma Technology. New York, NY: American Elsevier Publishing Company, Inc, 1969, pp232-273.
      Plasma Torches


 ICP
 CMP
 MIP
 RF-CCP


           E.A. Cordos, T. Frentiu, A.M. Rusu, S.D. Angel, A. Fodor, M. Ponta, “Analytical
           characterisation of a capacitively coupled plasma torch with a central tube electrode”
 Low Pressure Plasma Jets
 Must use small samples

 Require Vacuum => Equipment Costs

 Continuous Maintenance
                   Atmospheric Plasma Jets

          No Vacuum Required

          Lower Purchase and Maintenance
               Costs




M.C. Kim, S.H. Yang, J.H. Boo, J.G, Han, "Surface treatment of metals using an atmospheric pressure plasma jet and their surface characteristics,"
Surface and Coatings Technology 174-175, (2003) 839-844.
Surface Treatment and Adhesion
  M. Kim, S. Yang, J. Boo, J. Han:
   Nano-Surface Technology Team, Korea
   Institute of Industrial Tech.
  Increased Adhesion
  Surface Topographical Changes
  Chemical Changes
    Covalent Bond Pairs
  Aggregated Particles
    M.C. Kim, S.H. Yang, J.H. Boo, J.G, Han, "Surface treatment of metals using an atmospheric pressure plasma
    jet and their surface characteristics," Surface and Coatings Technology 174-175, (2003) 839-844.
        Topographical Changes




Untreated PET                                                                               Treated PET
 M. Noeske, J. Degenhardt, S. Strudthoff, U. Lommatzsch, "Plasma jet treatment of five polymers at atmospheric pressure:
 surface modifications and the relevance for adhesion," International Journal of Adhesion & Adhesives 24, (2004) 171-177
         Aggregated Particles




The aggregation of
particles increased with
the plasma jet application
and a lower N2:O2 ratio.

     M.C. Kim, S.H. Yang, J.H. Boo, J.G, Han, "Surface treatment of metals using an atmospheric pressure plasma
     jet and their surface characteristics," Surface and Coatings Technology 174-175, (2003) 839-844.
                       Binding Energy

High-resolution
XPS spectra of
the C 1s binding
energy region
before (…) and
after (–) plasma
activation.


         M.C. Kim, S.H. Yang, J.H. Boo, J.G, Han, "Surface treatment of metals using an atmospheric pressure plasma
         jet and their surface characteristics," Surface and Coatings Technology 174-175, (2003) 839-844.
    Answers to Questions
 Advantages of atmospheric plasma:
   Larger sample capability
   Lower cost
   Lower temperatures
 Increased Binding Energy with Plasma
 Application
   Topographical changes
   Creation of more covalent bond pairs
            Summary
 Questions
 Acronyms
 Background and Development
 Physical Properties
 Different Types of Plasma Jets
 A Plasma Jet Application
 Answers

								
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