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Individual particle characterization device for thermal and cold spray processes

Long pulsed laser-ultrasonic detection laser
Tecnar develops, manufactures and markets advanced sensors to optimize industrial processes.
© Courtesy of Oerlikon Mecto (US) Inc
© Courtesy of University of Notingham
© Courtesy of NRC Canada
References & Cases studies

At Forschungszentrum Jülich, we have used the Dpv extensively and successfully for over 15 years to better understand and optimize our thermal spray processes. Its unique capability to simultaneously measure the temperature, velocity and size of individual particles and to perform cross-sectional maps of the spray plume has had a tremendous impact on our activities in the fields of process development, parameter optimization and quality management.

Dr. Georg Mauer
Head of Thermal Coating Technology Team
Institute of Energy and Climate Research (IEK-1)
Forschungszentrum Jülich GmbH, Germany

Aachen University
Concordia University
GE Global Research
National research Council Canada
Sandia National Laboratories
SUNY Stony Brook
University West
Xian Aerospace Materials Institute
See DPV Evolution in action

Dpv evolution
innovative technology

In thermal spray, a material initially in the form of solid powder or wire is fed to the high-temperature spray torch to be melted and accelerated toward the parts to be coated. Before impinging on the substrate, the material is in the form of liquid droplet/particles, ranging from 1 to 150 microns in size, depending on the application. The particles typically travel at velocities from 50 to 1200 m/s, depending on the type of process/spray conditions used and their surface temperature may vary from 1,000° to 3,500° Celsius. The Dpv evolution measures the infrared radiation emitted by the liquid droplets and uses that data to calculate the individual particle’s temperature, velocity and size. Contact us
Capable of providing individual particle characteristics for most commercially available spray material.

Temperature measurement from 1,000° to 4,000° Celsius
Velocity measurement from 5 to 1,200 m/s
Diameter measurement from 10 to 300 microns

Tecnar DPV Evolution

DPV Evolution technical specifications

  • Measurement ranges

    • Particle temperature range
      (size and emissivity dependent)

      1000°C and higher at 2.5% resolution

      1832°F and higher at 2.5% resolution

    • Particle velocity range

      5 - 1200 m/s

      16.3 - 3900 ft/s at 0.5%

    • Particle diameter

      5 – 7 % resolution

    • Center plume position

      0.2 mm resolution

      0.008 in. resolution

    • Particle relative flow

      normalized a.u.

  • Measurement volume information

    • Dpv measurement volume

      0.25 mm3

    • Sensor head working distance

      100 mm (4 in.) from spray torch axis at 90°

    • XY scanning unit travel range

      100 mm x 100 mm
      4 in. x 4 in.

  • Product options

    • Cps-2000

      for cold particles characterization

    • Plumespector

      for spray plume cross-sectional intensity profile

    • Substrate temperature pyrometer

      From -18 to 525 °C

  • Dimensions and weight

    • Sensor head

      90 mm x 33 mm
      3.5 in. x 1.3 in.

    • Xy scanner

      300 mm x 125 mm x 330 mm
      11.8 in. x 4.9 in. x 13 in.

    • Main enclosure

      560 mm x 260 mm x 660 mm
      22 in. x 10.2 in. x 26 in.

    • Touch screen

      430 mm / 17 in.
      1024 x 768 minimum resolution

  • Plant supplies

    • Power requirements

      100 /120 – 200 /230 VAC, 50-60 Hz, auto-switch

    • Plant to supply

      20-30 psi of clean, dry compressed air

Dpv evolution