?
The fabrication of PICA begins with the procurement of rayon, which is derived from wood pulp cellulose and is preferred over other carbon-based materials because of its low thermal conductivity. The rayon is carbonized and cast into a rigid block called FiberForm. The FiberForm is then infused with a low-density aerogel of phenolic resin that serves as the ablative material during reentry. Completed PICA billets can then be machined into tiles and installed on an aeroshell.
?
?
文章
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://spacex.com.pl/files/2017-11/pica-x.pdf
?
