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Modified Polysilazane Products

While standard Polysilazanes are commercially available, metal-modified Polysilazanes are not. Agostyx is proud to offer the following series of metal-modified Polysilazanes for high-performance applications. Included in our offerings is the Original Ceraset™ Poly(Urea)Silazane.

    Poly(urea)methylvinylsilazane “PUMVS/KiON Ceraset®”

Base polymer used to prepare the metal-modified polysilazanes below, and once offered under the trade name “Ceraset®” by KiON corporation, our
poly(urea)methylvinylsilazane is a low viscosity, thermally crosslinkable SiCN precursor polymer that can be used in a variety of demanding applications including ceramic matrix composites (CMC's), non-oxide silicon ceramics manufacturing, 3D printing, and much more. 


The incorporation of boron into a polysilazane results in a ceramic having high temperature oxidation resistance. It can also assist in densification and crack-prevention through glassy liquid phases promoted by in-situ oxidation of the boron component to boron oxides. The resulting ceramic incorporates tough, shock-resistant forms of SiBCN.


The pyrolysis of polyaluminosilazanes results in the formation of several useful ceramic phases, including SiAICN, SiAION, and SiCAION. Desirable properties of such ceramic phases include oxidative resistance >1400C, corrosion and oxidation resistance in 1100C water vapor environments, as well as NaCL accelerated corrosion testing. 


High temperature and corrosion resistant ceramic phase of SiCN-TiO/N possible with this modified polymer. Both TiO2 and TiN ceramic phases are formed. 


With the incorporation of a significant fraction Zirconium oxide, our zirconosilazane can be used in the highest temperature ceramic applications. Once pyrolyzed, the zirconosilazane forms a highly thermally stable ceramic (SiCN-ZrO) that shows little to no mass loss to ~1500C. Fibers drawn from such zirconosilazanes can reach tensile strengths of 2.8GPa, with higher oxidative resistance than the un-modified ceramic.


In addition to its ultra-high temperature applications, high HfO2-SiCN ratios in the pyrolysis product of this polymer can result in highly oxidation-resistant HfSiO4 layers in the ceramic that are stable at UHT conditions in air and streaming capor with no volatilization. These layers form liquid HfSiO4 phases at temperatures above 1,750C that can assist in consolidation and durability of the ceramic at ultra-high temperatures.

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