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Open AccessArticle

Combining Thermal Spraying and Magnetron Sputtering for the Development of Ni/Ni-20Cr Thin Film Thermocouples for Plastic Flat Film Extrusion Processes

1
Institute of Materials Engineering, TU Dortmund University, Leonhard-Euler-Straße 2, 44227 Dortmund, Germany
2
Kunststofftechnik Paderborn, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(10), 603; https://doi.org/10.3390/coatings9100603
Received: 26 August 2019 / Revised: 16 September 2019 / Accepted: 20 September 2019 / Published: 24 September 2019
In the digitalization of production, temperature determination is playing an increasingly important role. Thermal spraying and magnetron sputtering were combined for the development of Ni/Ni-20Cr thin film thermocouples for plastic flat film extrusion processes. On the thermally sprayed insulation layer, AlN and BCN thin films were deposited and analyzed regarding their structural properties and the interaction between the plastic melt and the surfaces using Ball-on-Disc experiments and High-Pressure Capillary Rheometer. A modular tool, containing the deposited Ni/Ni-20Cr thin film thermocouple, was developed and analyzed in a real flat film extrusion process. When calibrating the thin film thermocouple, an accurate temperature determination of the flowing melt was achieved. Industrial type K sensors were used as reference. In addition, PP foils were produced without affecting the surface quality by using thin film thermocouples. View Full-Text
Keywords: nickel–chromium; thin film thermocouples; physical vapor deposition; flat film extrusion; foil quality nickel–chromium; thin film thermocouples; physical vapor deposition; flat film extrusion; foil quality
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MDPI and ACS Style

Tillmann, W.; Kokalj, D.; Stangier, D.; Schöppner, V.; Malatyali, H. Combining Thermal Spraying and Magnetron Sputtering for the Development of Ni/Ni-20Cr Thin Film Thermocouples for Plastic Flat Film Extrusion Processes. Coatings 2019, 9, 603.

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