Preceramic polymer

Source: Wikipedia, the free encyclopedia.

The term preceramic polymer refers to one of various polymeric compounds, which through pyrolysis under appropriate conditions (generally in the absence of oxygen) are converted to ceramic compounds, having high thermal and chemical stability. Ceramics resulting from the pyrolysis of preceramic polymers are known as polymer derived ceramics, or PDCs. Polymer derived ceramics are most often silicon based and include silicon carbide, silicon oxycarbide, silicon nitride and silicon oxynitride. Such PDCs are most commonly amorphous, lacking long-range crystalline order. [1]

The field of preceramic polymers and polymer derived ceramics in general emerged from the requirements in aerospace industries for heat shield materials such as fiber reinforced ceramic / ceramic composite materials.

SiOC type ceramics respectively. [3]

A low-cost method of creating complex 3D shapes of ceramics components is to use

additive manufacturing of complex shaped ceramic objects. In such methods, by means of irradiation-driven cross-linking, liquid preceramic polymers transform into rigid thermoset polymers that preserve their shape through the following polymer-to-ceramic transformation that takes place in pyrolysis. In this transformation, polymers transform into glassy ceramic products. [1]

References

  1. ^ a b Kizhakke Veettil et al. [1] A versatile stereolithographic approach assisted by thiol-ene click chemistry, Additive Manufacturing 2019, volume 27 pages 80-90
  2. ^ Preceramic Polymers: Past Present and Future, Office of Naval Research
  3. ^ "Ceramic Forming Polymers". Starfire Systems. Retrieved 2021-08-18.
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