Raws li qhov sib txawv precursors, carbon fibers tau muab faib ua polyacrylonitrile (PAN) -raws li carbon fibers, pitch-raws li carbon fibers, thiab viscose{2}}raws li carbon fibers. Ntawm cov no, PAN-raws li carbon fibers tau pom txoj kev loj hlob sai vim lawv cov txheej txheem tsim khoom yooj yim, cov cuab yeej tsim tawm, thiab cov khoom siv tshuab zoo heev, suav txog kwv yees li 90% ntawm siab - lub zog carbon fibers.
Polyacrylonitrile -raws li Carbon Fiber
PAN-raws li carbon fiber yog npaj los ntawm polyacrylonitrile (PAN) fibers los ntawm pre-oxidation, carbonization, thiab graphitization kev kho mob. Hom fiber ntau no muaj lub zog siab, ntau qib, thiab ntim ntau lawm (sau ntau dua 90% ntawm tag nrho cov carbon fiber ntau lawm). Qhov siab dua qhov kev txiav txim ntawm fiber ntau microstructure, nws lub zog thiab modulus ntau dua. Piv txwv li, T800 muaj qhov kev txiav txim siab dua li T300, thiab nws lub zog thiab kev hloov pauv kuj tseem siab dua. Qhov siab dua qhov℃ntawm graphitization, qhov siab dua qhov elastic modulus.
Viscose-raws li Carbon Fiber
Viscose-raws li carbon fiber yog cellulose fibers uas ua los ntawm paj rwb los yog lwm yam ntuj fibers. Nws tau txais los ntawm qis -kub decomposition, carbonization, thiab graphitization kho ntawm viscose fibers. Viscose-raws li carbon fiber feem ntau yog siv rau hauv ablation- cov ntaub ntawv resistant, thermal rwb thaiv tsev cov ntaub ntawv, thiab pej xeem hluav taws xob khoom cua sov. Nws siv nws qhov zoo- tsim thiab tswj tau yooj yim porosity los tsim cov khoom siv carbon fiber ntau. Thaum viscose-raws li carbon fiber tso nyiaj tsawg dua 1% ntawm tag nrho cov carbon fiber ntau lawm, nws cov khoom tshwj xeeb ua rau nws hloov tsis tau.
Pitch-raws li carbon fiber
Pitch-raws li carbon fiber yog npaj los ntawm pitch raws li raw khoom los ntawm spinning, non{1}}kev kho melting, thiab carbonization. Nws nthuav tawm cov graphitization siab thiab kev taw qhia siab, uas ua rau muaj kev hloov pauv siab dua li PAN matrix fibers. Piv txwv li, lub elastic modulus ntawm pitch-raws li carbon fiber tsim los ntawm Nippon Steel Corporation ntawm Nyiv mus txog siab li 784 GPa.
