Polycarbide was a material used in the construction of Dalek casings. According to the Tenth Doctor, it was the "skin" of a Dalek. (TV: Doomsday)
Gallifreyan camera drones had hard drives with polycarbide layering. (AUDIO: Imperiatrix)
The Seventh Doctor described Daleks as "little green blobs in bonded polycarbide armour." (TV: Remembrance of the Daleks)
The Tenth Doctor modified energy blasters to pierce polycarbide and even temporarily disable the Cult of Skaro's gunsticks. (TV: Doomsday)
Nimrod wore bonded polycarbide armour while dealing with vampires. (AUDIO: Project: Twilight)
The Forge had a portable quarantine unit made of polycarbide. (PROSE: Project: Wildthyme)
Kim Kronotska locked C'rizz in cuffs made of bonded polycarbide. (AUDIO: Memory Lane)
Veltrochni firearms used polycarbide projectiles. (PROSE: Mission: Impractical)
Through salvaged Dalek technology, the Jaridens constructed their bulkheads using bonded polycarbide. (AUDIO: The Four Doctors)