High-speed thermal microscopy of plasma microprinting at atmospheric pressureThe HelixJet (https://www.inptdat.de/helixjet) was applied to simultaneous melting and plasma treatment of polyamide (PA 12) microparticles (diameter 60 µm) used conventionally for 3D printing by laser sintering. This proof-of-principle experiment demonstrated that gaussian thickness profiles of PA 12 can be printed using the HelixJet with a rapid rate of 200 mg/s (peak growth 2 mm/s) and with advantageous material properties. The key element of this novel process is the self-regulated balance between material melting and plasma quenching. As a result, particles leaving the HelixJet with the gas flow velocity have a temperature slightly below the melting temperature preventing material degradation that would occur at higher temperatures. The above process has been captured with a high-speed infrared camera. The resulting movie combines the best temporal and spatial resolution for the studied process and reveals the particle temperature of 180°C to 190°C and their velocity of 0.5 m/s to 3 m/s depending on the radial position.

]]>plasma microprintingself-controlling mechanismthermal diagnosticMaterials / Surfaces43775bda-6c4c-4060-8ff8-c847d2a6094e2019-07-09T12:07:47+02:002020-02-25T15:53:14+01:00enINPHigh-speed thermal microscopy of plasma microprinting (high-speed video)The high-speed video combines the best temporal and spatial resolution for the studied process and reveals the particle temperature of 180°C to 190°C and their velocity of 0.5 m/s to 3 m/s depending on the radial position.

]]>2019-07-09T12:25:04+02:002020-02-14T19:44:19+01:00video/mp4mp482829906https://inptdat.de/dataset/high-speed-thermal-microscopy-plasma-microprinting-atmospheric-pressure/resource/73f9ee9bDKANhttps://inptdat.de