Each claim states how it is known and cites its evidence.
EstablishedModerate-temperature, deep-penetrating route suited to complex shapes.
Because pyrolysis runs at relatively low temperature, no more than about 1500 °C, precursor infiltration and pyrolysis is unlikely to damage carbon fibres, and because the liquid precursor penetrates deeply it can make complex shapes; the precursor chemistry can also be designed to tailor the fibre–matrix bond.
- precision note: The review gives the pyrolysis temperature as no more than 1500 °C; it is an upper bound, not a process setting, and is not published as a quantity.
Evidence support: Supported by the cited evidence · one source
Evidence: Ruize 2025 · Peer-reviewed
EstablishedPorosity and cracking from shrinkage, many slow cycles, possible fibre degradation.
Precursor infiltration and pyrolysis leaves open porosity, pores and micro-cracks from gas evolution and the shrinkage of precursor to ceramic, which can later admit oxygen; the many cycles make it slow and costly; and carbon fibres can be degraded by reaction with the precursors, which interphase coatings protect against at the cost of reducing infiltration into the fibre tows.
Evidence support: Supported by the cited evidence · 2 sources, multiple sources, independence unknown
Evidence: Jon 2020 · Peer-reviewed; Ruize 2025 · Peer-reviewed
EstablishedLiquid preceramic polymer infiltrated, cross-linked and pyrolysed, repeated many times.
In precursor infiltration and pyrolysis a liquid preceramic polymer is infiltrated into a fibre preform, cross-linked and pyrolysed at elevated temperature so that it converts to ceramic inside the preform; because conversion is incomplete, gas is evolved and the precursor shrinks, the cycle is repeated many times — often a dozen or more — until the matrix is dense enough.
Evidence support: Supported by the cited evidence · 2 sources, multiple sources, independence unknown
Evidence: Jon 2020 · Peer-reviewed; Ruize 2025 · Peer-reviewed