Corrosion resistant polymer derived ceramic composite environmental barrier coatings

Corrosion and Oxidation Behavior of Polymer Derived Ceramic Coatings With Passive Glass Fillers on Aisi441 Stainless Steel

“…Key issue to produce defect free coatings is the reduction of shrinkage and porosity formation by adding passive or active fillers [21], which partially or completely eliminates the volume change due to polymer to ceramic conversion. A number of authors figured out that the incorporation of passive fillers like BN [22], ZrO 2 [23] or Al 2 O 3 [24] can decrease the volume fraction of shrinking while reactive filler particles like ZrSi 2 [25] or TiSi 2 [26,27] can compensate the shrinkage of pre-ceramic polymers through reactions with the polymer decomposition products and formation of products with higher specific volume. Furthermore, depending on the properties of the substrate, the thermal expansion coefficient of the coatings can be adjusted by an adequate filler material.…”

Low thermal conductivity coating system for application up to 1000°C by simple PDC processing with active and passive fillers

“…Additionally, the PDC approach has proven to be a suitable alternative for the processing of functional coating systems with protective properties against oxidation and corrosion, high optical emissivity, and many others [16][17][18][19][20][21][22].…”

“…The wide range of properties achievable by PDC processing arise from the possibility of choosing between several preceramic polymers like polysilazanes [17,18,[29][30][31], polysiloxanes [21,25], polycarbosilanes [32], and others. Moreover, by mixing the polymers with ceramic, metallic or even polymeric filler particles it is possible to achieve different kinds of properties and characteristics like high hardness and wear resistance, improved corrosion and oxidation resistance, enhanced electrical conductivity, tailored thermal properties, controlled porosity, and more [33].…”

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

“…Both filled and unfilled coatings have been used for applications ranging from environmental protection to wear resistance (Torrey et al 2006;Torrey and Bordia 2008a, b;Wang et al 2014;Günthner et al 2011;Wang et al 2011). Joining and sealing of ceramic materials has also been achieved using preceramic polymers (Colombo et al 2000;Lewinsohn et al 2005).…”

“…In order to make thick coatings, the polymeric systems have been filled with reactive fillers that expand during the polymer-to-ceramic conversion (Torrey et al 2006;Torrey and Bordia 2007;Wang et al 2011Wang et al , 2014. These coatings have been shown to demonstrably improve the oxidation resistance of both Fe-based and Ni-based superalloys.…”