The role of the external and internal shock-absorption effect in the aerosol codeposition of titanium dioxide and polystyrene particles
Year: 2026
Type: article
Abstract: Aerosol deposition (AD) is a promising spray-coating process for producing dense ceramic coatings at room temperature on a wide variety of substrates. However, extensive lattice defects and high compressive residual stresses arising from the intense particle impact limit its applicability. Co-deposition of polymers and ceramics has emerged as a strategy to mitigate these issues by dissipating part of the ceramic particle impact energy through deformation of the polymer phase. A similar effect occurs when pure ceramic powders are deposited on soft polymer substrates. These internal and external shock-absorption effects modify the deposition mechanism and can increase crystallite size, reduce microstrain, and lower residual stresses. In this work, pure titanium dioxide (TiO2) powders and TiO2/Polystyrene composite powders were deposited on soft polymer substrates and hard borosilicate glass. High-resolution synchrotron X-ray diffraction and FIB-SEM cross-sections reveal how both shock-absorption effects influence microstructure and deposition behavior, demonstrating the beneficial role of polymer incorporation in reducing defects and residual stresses.
Authors: Daniel Paulus, Marc C. Thiel, Jürgen Schneider, Karen Lienkamp, Ralf Moos
Institution: Saarland University
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,134
Awards: G1898643525, G2378330374, Pulveraerosolbasierte Kaltabscheidung keramischer Schichten: optisch induzierte thermische Nachbehandlung zur Wiederherstellung der Funktionseigenschaften, PADFlexTEG: Direkt aus dem Pulver kaltabgeschiedene nanokristalline µmdicke BismuttelluridSchichten für flexible thermoelektrische Generatoren
OpenAlex ID: W7204134070