Qhov txawv ntawm carbon fiber thiab Kevlar® yog dab tsi?

Qhov txawv ntawm carbon fiber thiab Kevlar® yog dab tsi?
Ntawm no, peb tham txog qhov zoo sib xws thiab qhov sib txawv ntawm carbon fiber thiab Kevlar, lawv ua li cas, thiab qhov zoo thiab qhov tsis zoo ntawm txhua tus. Peb muab cov pa roj carbon fiber ntau me me los ntawm qhov ntsuas ntawm peb lub vev xaib e-lag luam, nrog rau carbon fiber thiab aramid fabrics suav nrog Kevlar los ntawm peb Leeds thiab Newry warehouses tshaj 10m deb.

Carbon fiber yog dab tsi?
Carbon fibers yog ntev, nyias threads ua feem ntau ntawm carbon atoms bonded ua ke nyob rau hauv daim ntawv ntawm microscopic crystals.

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

 

Plain Weave: Kuj tseem hu ua ob-txoj kev txheej txheem dhau / hauv qab, nws yooj yim heev los tuav vim nws txoj hlua nruj.
Twill: kab pheeb ces kaum ntawm sab saum toj mus rau hauv qab Qhov no yog cov qauv yooj yim tshaj plaws uas qhia tau cov pa roj carbon fiber ntau thiab muaj ib daim ntawv xoob dua li cov qauv tsim, ua kom nws zoo dua rau cov duab ntau dua.
Satin: Satin muaj qhov zoo ib yam li cib, los ntawm cov khaubncaws sab nraud povtseg (feem ntau yog plaub lossis yim) mus rau tom ntej. Cov qauv no tsis yog qhov yooj yim tshaj plaws los ua haujlwm nrog thiab ua haujlwm zoo tshaj plaws nrog cov nkhaus nkhaus.
Unidirectional: Raws li lub npe qhia, tag nrho cov xov paj yog unidirectional. Tsis muaj weaving, nws yog feem ntau tuav ua ke nrog threads, tab sis qhov no tsis hloov cov qauv ntawm cov carbon fiber. Nws yog qhov zoo tshaj plaws rau cov pwm uas muaj zog ua haujlwm ntawm ib qho axis

Hu rau tam sim no

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 roj carbon fibers yog muab los ntawm cov organic polymers, uas yog cov hlua ntawm cov molecules tuav ua ke los ntawm carbon atoms.

Cov txheej txheem tsim PAN (polyacrylonitrile) suav txog kwv yees li 90% 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.
Cov fibers yog oxidized los txhim kho cov khoom sib txuas.
Thaum kawg, cov hlau yog coated thiab raug mob rau hauv cov xov hlau 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 sib txuas rau cov polymer siv cov cua sov, siab, lossis lub tshuab nqus tsev los tsim cov khoom sib xyaw.
Raws li nrog rau cov txheej txheem tsim khoom, cov ntaub ntawv siv yuav tsim cov khoom tshwj xeeb thiab cov teebmeem hauv cov pa roj carbon fiber ntau, tso cai rau kev muab qhab nia thiab kev siv sib txawv.
Cov txiaj ntsig ntawm carbon fiber yog dab tsi?
Cov pa roj carbon fiber ntau paub txog nws lub teeb yuag thiab lub zog siab, ua rau nws yog ib qho khoom siv zoo tshaj plaws rau 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
Kev ua haujlwm qaug zog zoo heev
Haum rau ntau yam khoom sib txawv
Hluav taws xob thiab thermal conductivity
Muaj tsawg thermal expansion coefficient

Thov Hu Rov Qab