Functional Coatings Based on Preceramic Polymers

Barroso, Gilvan; Kraus, Tobias; Degenhardt, Ulrich; Scheffler, Michael; Motz, Günter

doi:10.1002/adem.201500600

Cited by 17 publications

(10 citation statements)

References 23 publications

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“…To investigate the effects of crosslinking duration on the ceramic yield, the glass transition temperature, and the density of the pyrolyzed resins, 33,40 we performed thermal analysis experiments on the resins crosslinked for 1, 4, and 24 h with the identical conditions to the previous experiments. Detailed results are presented in Tables S1-S3, and Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…The density measurements and glass transition temperature also confirmed the full curing of the samples crosslinked for 24 h. The results match with the measurements done by. 40 In order to further analyze the effects of catalyst concentration and crosslinking duration on the resins, we performed FTIR. To assess the effect of catalyst concentration, FTIR spectra were collected on the resin before crosslinking, and after 1-h of crosslinking with different amounts of catalyst (DCP) 0%, 1%, 2%, and 4% (Figure 4A).…”

Section: Resultsmentioning

confidence: 99%

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Processing and 3D printing of SiCN polymer‐derived ceramics

Mahmoudi

Kim

Arifuzzaman

et al. 2021

Int J Applied Ceramic Tech

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Preceramic polymer resins are attractive for the 3D printing of net-shaped ceramic components. Recently various processes have been demonstrated for 3D printing of polymer-derived ceramics (PDCs). Ultimately in these processes, the process outcomes strongly depend on the process parameters. In particular, for PDCs the ceramic density, and ceramic yield are affected by the catalyst concentration and cross-linking duration. Here, we use thermal analysis and FTIR to quantify the interrelation of the process parameters on the process outcome for polysilazanes and demonstrate 3D printing of PDC components based on the best-identified process parameters. The results of this work can be used as guidelines for future additive manufacturing of PDCs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Processing and 3D printing of SiCN polymer‐derived ceramics

Mahmoudi

Kim

Arifuzzaman

et al. 2021

Int J Applied Ceramic Tech

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“…Polysilazane‐based coatings have been developed for a large variety of applications at temperatures ranging from below 0 to 1500 °C and beyond. [ 2 ] These coatings can modify surface properties of common structural materials to increase the mechanical and chemical resistance of the system [ 11–17 ] or to tailor specific properties, such as thermal conductivity, [ 18 ] biocompatibility, [ 19 ] wettability, [ 20 ] permeability, [ 9,21 ] antibacterial, [ 22 ] antifouling, [ 23 ] and optical properties. [ 10 ] Another application of polysilazane‐based coatings—from the best of our knowledge, until now unexplored—is anti‐adherence.…”

Section: Introductionmentioning

confidence: 99%

Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

Barroso

Döring

Horcher

et al. 2020

Adv Materials Inter

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Polysilazanes are excellent coating materials, because of their self‐crosslinking in air at low temperatures, high chemical and thermal stability, elevated hardness, and excellent adhesion to many different substrates. Therefore, coatings of two chemically different polysilazanes (crosslinked Durazane 1800 (HTTS)/perhydropolysilazane (PHPS)) are deposited by either dip or spray coating and crosslinked at 200 or 300 °C in air to investigate the chemical composition, surface energy, and coating adhesion in dependency on the precursor type and crosslinking temperature. The silazane HTTS possesses a higher amount of nonpolar organic groups resulting in a lower surface free energy. The anti‐adherence properties are investigated by using a phenolic resin via pull‐off adhesion, which is slightly reduced from 13 MPa for uncoated aluminum to less than 10 MPa for HTTS coated substrates. The addition of different amounts of poly(tetrafluoroethylene) (PTFE) particles causes a remarkable reduction of the surface free energy leading to a strongly reduced pull‐off adhesion of less than 4 MPa of the phenolic resin from the HTTS/PTFE coated substrates. The anti‐adherent properties remain even after repeated pull‐off tests. Because of the excellent properties, the HTTS/PTFE coatings are a very suitable system for easy mold release of plastic parts from metal molds and to replace commercial nonstick PTFE coatings.

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“…Fillers may also modify the properties of coatings, such as thermal and electrical conductivity (such as graphite or ZrO 2 ), thermal expansion (such as ZrO 2 ), hardness (such as SiC and c-BN), and tribology (such as h-BN and c-BN). Recently, there have been few studies performed at room temperature and very low loads, in the range of mN, for lubricating behavior of coated/bulk PDCs 38 – 42 , and on composite PDC coatings with addition of h-BN and c-BN fillers 43 . However, there are no reports studying the tribological properties of PDC coatings at higher loads and temperatures to best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

High temperature tribology of polymer derived ceramic composite coatings

Alvi

Akhtar

2018

Sci Rep

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Polymer derived ceramic (PDC) composite coatings were deposited on AISI 304 substrates using siloxane based preceramic polymer polymethlysilsquioxane (PMS) and ZrSi2 as active filler or Ag as passive filler. The tribological performance of the composite coatings was evaluated at room temperature and moderately high temperatures (150 °C, 200 °C, 300 °C and 400 °C). The composite coatings showed low coefficient of friction (COF), µ, from 0.08 to 0.2 for SiOC-ZrSi2 composite coatings, and from 0.02 to 0.3 for SiOC-Ag composite coatings, at room temperature with increasing normal load from 1 to 5 N. High temperature tribology tests showed high COF values from 0.4 to 1 but low wear for SiOC-ZrSi2 coating, and low COF from 0.2 to 0.3 for SiOC-Ag coatings at lower temperature ranges. Low load friction tests at room temperature showed negligible wear in SiOC-ZrSi2 coatings, suggesting good wear resistant and lubricating properties due to formation of t-ZrO2 and carbon. Low COF and high amount of wear was observed in SiOC-Ag composite coatings at room temperature due to high ductility of Ag and smearing of wear debris in the wear track. The coatings and wear tracks were characterized to evaluate the lubrication and wear behavior.

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Functional Coatings Based on Preceramic Polymers

Cited by 17 publications

References 23 publications

Processing and 3D printing of SiCN polymer‐derived ceramics

Processing and 3D printing of SiCN polymer‐derived ceramics

Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

High temperature tribology of polymer derived ceramic composite coatings

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