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Pyrolytic Graphite
(redirected from Pyrolytic carbon)

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Pyrolytic Graphite 

(also called pyrographite), a poly-crystalline carbonaceous material that is deposited from the gas phase during pyrolysis of hydrocarbons at temperatures that range from 750° to 2400°C.

Depending on the conditions of pyrolysis, including temperature, concentration of initial materials, and type of diluent, pyrolytic graphite can have high density or low density as well as anisotropic or practically isotropic properties. Two brands of pyrolytic graphite are used in the USSR: PGV graphite, which is highly anisotrophic, and PGI graphite, which is isotropic. Pyrolytic graphite has high thermal stability and lacks open pores. It is used to make crucibles and other apparatus for the production of semiconductors, glass, single-crystal materials, and pure metals. PGI graphite is used as an antifriction packing material, and PGV graphite is used for erosion-resistant coatings.
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[FIGURE 7 OMITTED] C/C composite was composed of the carbon fiber, pyrolytic carbon matrix with lamination microstructure, and ~10 vol.
Effect of heat treatment at 1300[degrees]C on W coating prepared by ... by Zhang, Ying; Chen, Zhaofeng; Wang, Liangbing; Wu, Wangping; Fang, Dan / JCT Research
Mechanical valves: Mechanical heart valves are made of metal, plastic, and pyrolytic carbon.
Heart Valve Surgery by Anna Hart / Health care industry community
It uses 60 mm diameter graphite spheres filled with thousands of tiny, less than 1mm diameter HEU particles coated with a layer of porous pyrolytic carbon providing space for fuel expansion and fission gas formation, isotropic pyrolytic carbon layers for mechanical stability, a dense silicon carbide shell as diffusion barrier for the fission-formed Cs, Sr and Ba, and finally a dense strong pyrocarbon layer that compresses and fixes the carbide shell.
Enriched uranium technology at the Sillamae oil shale processing plant by Lippmaa, E.; Maremae, E.; Trummal, A.; Rummel, A.; Lippmaa, J. / Oil Shale
 
 
 
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