Micropatterned Ceramic Surfaces by Coating with Filled Preceramic Polymers

Abstract

Surface structures in micrometer scale were prepared on different substrates by a coating process using particle‐filled slurries based on a blend of preceramic polymers. Parameters like solvent fraction, substrate material, filler particle size, and layer thickness were varied. Demixing reactions of solvent and polymers led to surface structures with pores of 1–60 μm in diameter. The solubility parameters δt of the polysiloxanes used are about 18.7 MPa1/2 for poly(methyl phenyl vinyl siloxane) and 19.5 MPa1/2 for poly(methyl siloxane), respectively. By pyrolysis of the green layers, ceramic coatings were obtained by keeping the particular surface structures.

Self-assembled microstructured polymeric and ceramic surfaces

“…Coatings were produced from a filled slurry with wellknown properties from previous investigations to minimize unexpected effects 17,[22][23][24] PMPS was dissolved in MTES by stirring with a magnetic stirrer. After 10 min PMS was added and stirring was continued for another 2 h, i.e.…”

“…This was shown for the first time in Ref. [17]. Surface structures in micrometre scale were prepared on different substrates by a coating process using particle-filled slurries based on a blend of two preceramic polymers.…”

SiC ceramic micropatterns from polycarbosilanes

“…It was suggested that the formation of the ceramic surface patterns depends on the immiscibility of the polymers, polymer ratio, the evaporation rate of the solvent in addition to the film thickness. 12 If PCS films were too thin (<30 m), they are difficult to peel off from the PDMS master. In the present work a cross-linking temperature of 200 • C yielded PCS specimens with an undamaged microstructure and as an intact film compared to a cross-linking temperature of 400 • C. Cross-linking at 400 • C resulted in considerably hard PCS films, which strongly adhered to the PDMS and showed defects in the replication of the microstructure.…”

“…10 Micropatterning of ceramics using polymeric ceramic precursors has gained particular interest due to facile shaping processes and their applications in mechanical devices, energy systems, bioengineering, biomedical science or as catalyst supports. [11][12][13][14] Conventional techniques for micropatterning of SiC, Si 3 N 4 and SiBNC using reactive ion etching 15 are time consuming and cost intensive. Liquid polymeric ceramic precursors are suitable candidates to generate complex ceramic features applying soft lithographic techniques without the need for etching procedures.…”

Ceramics for Sustainable Energy Technologies with a Focus on Polymer-Derived Ceramics

“…In a recent contribution (Stern et al 2009), two preceramic polymers were mixed with SiC fillers and the rheological properties were adapted to carry out a coating process as described in Sect. 2.2.2.…”