Three-dimensional_quartz_phenolic
Three-dimensional quartz phenolic (3DQP)[1] is a phenolic-based material composed of a quartz cloth material impregnated with a phenolic resin and hot-pressed. When cured, 3DQP can be machined in the same way as metals and is tough and fire-resistant. 3DQP is used for the manufacture of nuclear weapon re-entry vehicles (RV).
The quartz material 'hardens' the RV protecting the nuclear warhead against high-energy neutrons emitted by exo-atmospheric Anti-ballistic missile (ABM) bursts before re-entry.[2]
3DQP was first used on the British Chevaline improved front end (IFE) for the Royal Navy's UGM-27 Polaris system that was in service from 1982 to 1996, when it was replaced by Trident D5.