Qhov txawv ntawm carbon fiber thiab Kevlar yog dab tsi?

Carbon fiber yog dab tsi?

Carbon fibers yog ntev, nyias threads ua feem ntau ntawm carbon atoms khi ua ke nyob rau hauv microscopic crystals.

Cov crystals yog sib npaug, uas ua rau lawv muaj zog heev. Tom qab ntawd lawv tau sib tw ua ke, zoo li cov txheej txheem paj rwb, los ua cov xov paj. Cov yarns ces woven ua ke los ua cov ntaub carbon fiber. Muaj ntau hom weaves rau carbon fiber:

Plain Weave: Kuj tseem hu ua Ob-Txoj Kev Standard Top / Down yog qhov yooj yim heev rau kev ua haujlwm vim yog qhov nruj nruj.

Twill: kab pheeb ces kaum ntawm tshaj-dhau thiab nyob rau hauv-hauv Nws yog qhov zoo tshaj plaws paub cov qauv carbon fiber ntau thiab muaj ib daim ntawv xoob dua li cov qauv tsim, ua rau nws tsim nyog rau ntau cov duab.

Satin: Satin muaj lub cib zoo li zoo li los ntawm cov lej uas ntau dua (feem ntau plaub lossis yim) mus rau tsawg dua ib. Cov qauv no tsis yog qhov yooj yim tshaj plaws los ua haujlwm nrog, tab sis ua haujlwm zoo tshaj plaws nrog cov nkhaus nkhaus.

Unidirectional: Raws li lub npe qhia, tag nrho cov xov paj yog unidirectional. Tsis muaj weave, feem ntau cov xov yog siv los tuav nws ua ke, tab sis qhov no tsis hloov cov qauv ntawm carbon fiber. Qhov zoo tshaj plaws rau cov pwm uas muaj kev ntxhov siab hauv ib qho axis nkaus xwb

Yuav ua li cas carbon fiber?

Txhua lub tuam txhab carbon fiber muaj nws tus kheej txoj kev ua cov khoom los muab nws lub zog lossis zoo nkauj muag yam ntxwv. Feem ntau, txawm li cas los xij, tag nrho cov carbon fibers los ntawm cov organic polymers, uas yog cov saw hlau molecular ntawm carbon atoms tuav ua ke.

Cov txheej txheem tsim PAN (polyacrylonitrile) suav txog li 90 feem pua ​​​​ntawm tag nrho cov khoom siv carbon fiber ntau thiab muab faib ua tsib kauj ruam:

Polyacrylonitrile yog tov nrog lwm yam khoom thiab spun rau hauv fibers, uas yog ces stretched thiab ntxuav.

Tom qab ntawd cov tshuaj ntxiv kom ruaj khov

Ntxiv cov cua sov, qhov kub thiab txias pab tsim kom nruj cov pa roj carbon crystals.

Fibers yog oxidized los txhim kho cov khoom sib txuas.

Thaum kawg, cov strands yog coated thiab raug mob rau hauv threads ntawm ntau qhov sib txawv. Ua ntej cov pa roj carbon fiber ntau dhau los ua cov khoom sib xyaw, cov khoom siv polymer ntxiv, thiab cov xov thiab cov khoom siv polymer yog sib koom ua ke los ntawm cua sov, siab lossis lub tshuab nqus tsev los tsim cov khoom sib xyaw.

Raws li nrog rau txhua txoj kev tsim khoom, cov ntaub ntawv siv yuav tsim cov khoom tshwj xeeb thiab cov teebmeem hauv carbon fiber, tso cai rau kev muab qhab nia thiab daim ntawv thov sib txawv.

Cov txiaj ntsig ntawm carbon fiber yog dab tsi?

Cov pa roj carbon fiber tau paub txog nws lub teeb yuag thiab lub zog siab, ua rau nws yog cov khoom siv zoo tshaj plaws hauv kev lag luam marine, automotive thiab aerospace industries. Cov txiaj ntsig tseem ceeb suav nrog:

Lub zog zoo heev rau qhov hnyav piv

siab kub tsis kam

High chemical / corrosion kuj (thaum siv nrog cov resin raug)

Yooj yim heev rau ntau yam kev siv

zoo heev qaug zog zog

Haum rau ntau yam khoom sib txawv

hluav taws xob thiab thermal conductivity

Nws muaj ib tug tsawg coefficient ntawm thermal expansion

Dab tsi yog qhov tsis zoo ntawm carbon fiber?

Txawm hais tias nws muaj ntau yam zoo, carbon fiber tseem yog cov khoom siv sib xyaw tshiab, tab sis nws kuj muaj qee qhov tsis zoo:

kim piv rau lwm cov ntaub ntawv sib xyaw

Manufacturing yog ntau zog intensive

Tam sim no tsis tuaj yeem rov ua dua tshiab, carbon fiber feem ntau siv tsis siv hlau lossis txhuas, ob qho tib si yog cov khoom siv rov ua dua tshiab

Yuav tawg / tawg thaum tshaj nws lub peev xwm

Yog tias puas lawm, nws yuav tsum tau hloov, tsis kho zoo li cov qauv hlau