Kukonzekera ndondomeko ya carbon fiber composite zipangizo

Chidule cha Zida Zophatikizika za Carbon-Carbon

Mpweya wa carbon/carbon (C/C)ndi kaboni CHIKWANGWANI kulimbikitsa zophatikizika zakuthupi ndi mndandanda wa zinthu zabwino kwambiri monga kulimba kwambiri ndi modulus, kuwala yeniyeni yokoka, yaing'ono matenthedwe kukulitsa coefficient, kukana dzimbiri, matenthedwe kukana kugwedezeka, kukana bwino kukangana, ndi kukhazikika kwa mankhwala. Ndi mtundu watsopano wa zinthu zophatikiza kutentha kwambiri.

C/C zinthu zophatikizikandi zabwino kwambiri matenthedwe kapangidwe-ntchito Integrated engineering chuma. Monga zida zina zophatikizika kwambiri, ndizophatikizika zomwe zimapangidwa ndi fiber-reinforced gawo komanso gawo loyambira. Kusiyana kwake ndikuti gawo lolimbikitsidwa komanso gawo loyambira limapangidwa ndi kaboni wangwiro wokhala ndi zinthu zapadera.

Zinthu zopangidwa ndi kaboni / kaboniamapangidwa makamaka ndi mpweya wa carbon, nsalu ya carbon, carbon fiber monga chilimbikitso, ndi nthunzi woyikidwa mpweya monga matrix, koma ali ndi chinthu chimodzi chokha, chomwe ndi carbon. Pofuna kuonjezera kachulukidwe, mpweya wopangidwa ndi carbonization umapangidwa ndi carbon kapena umakhala ndi utomoni (kapena asphalt), ndiko kuti, zinthu za carbon / carbon composite zimapangidwa ndi zinthu zitatu za carbon.

Njira yopangira zinthu zopangidwa ndi carbon-carbon composite

1) Kusankha kwa carbon fiber

Kusankhidwa kwa mitolo ya carbon fiber ndi mapangidwe apangidwe a nsalu za fiber ndizo maziko opangiraC/C kompositi. Mawonekedwe amakina ndi mawonekedwe a thermophysical a C/C composites amatha kuzindikirika posankha mwanzeru mitundu ya ulusi ndi magawo oluka a nsalu, monga kuyika kwa makonzedwe a ulusi, kusiyana kwa mitolo ya ulusi, kuchuluka kwa kuchuluka kwa ulusi, ndi zina zambiri.

2) Kukonzekera kwa carbon fiber preform

Carbon fiber preform imatanthawuza chopanda kanthu chomwe chimapangidwa kukhala mawonekedwe ofunikira a ulusi molingana ndi mawonekedwe azinthu ndi zofunikira pakuchita kuti akwaniritse kachulukidwe. Pali njira zitatu zazikuluzikulu zogwirira ntchito za magawo opangidwa kale: kuluka mofewa, kuluka molimba ndi kuluka kofewa komanso kolimba kosakanikirana. Njira zazikuluzikulu zoluka ndi izi: kuwomba ulusi wouma, kuluka kwamagulu a ndodo yoimiridwa kale, kubowola koluka bwino, kuluka kwa ulusi ndi mbali zitatu zoluka mosiyanasiyana. Pakadali pano, njira yayikulu yoluka yoluka yomwe imagwiritsidwa ntchito pazida zophatikizika za C ndi njira zitatu zoluka mosiyanasiyana. Pa nthawi yoluka, ulusi wonse woluka amauika m’njira inayake. Ulusi uliwonse umalumikizidwa pa ngodya inayake motsatira njira yake ndikulumikizana wina ndi mzake kupanga nsalu. Chikhalidwe chake ndi chakuti amatha kupanga nsalu zitatu-dimensional multi-directional lonse, zomwe zingathe kulamulira bwino kuchuluka kwa ulusi wamtundu uliwonse kumbali zonse za C / C zopangira zinthu, kotero kuti C / C yophatikizika ikhoza kukhala ndi mphamvu zamakina. mbali zonse.

3) C / C kachulukidwe ndondomeko

Mlingo ndi mphamvu ya kachulukidwe makamaka amakhudzidwa ndi nsalu kapangidwe ndi ndondomeko magawo a zinthu m'munsi. Njira zomwe zimagwiritsidwa ntchito pano zikuphatikiza impregnation carbonization, chemical vapor deposition (CVD), chemical vapor infiltration (CVI), chemical liquid deposition, pyrolysis ndi njira zina. Pali mitundu iwiri ikuluikulu ya njira njira: impregnation carbonization ndondomeko ndi mankhwala nthunzi infiltration ndondomeko.

Madzi gawo impregnation-carbonization

Madzi gawo impregnation njira ndi yosavuta mu zida ndi applicability lonse, kotero madzi gawo impregnation njira ndi njira yofunika pokonzekera C/C gulu zipangizo. Ndi kumiza preform opangidwa ndi mpweya CHIKWANGWANI mu impregnant madzi, ndi kupanga impregnant mokwanira kudutsa mu voids wa preform ndi pressurization, ndiyeno kudzera mndandanda wa njira monga kuchiritsa, carbonization, ndi graphitization, potsiriza kupeza.C / C zida zophatikizika. Zoyipa zake ndikuti zimatengera kubwerezabwereza komanso kuzungulira kwa carbonization kuti akwaniritse zofunikira za kachulukidwe. The zikuchokera ndi kapangidwe ka impregnant mu madzi gawo impregnation njira zofunika kwambiri. Sikuti amangokhudza kachulukidwe mphamvu, komanso zimakhudza makina ndi thupi katundu wa mankhwala. Kupititsa patsogolo carbonization zokolola za mimba ndi kuchepetsa mamasukidwe akayendedwe a impregnant akhala mmodzi wa nkhani zofunika kuthetsedwa pokonzekera C / C gulu zipangizo ndi madzi gawo impregnation njira. Kuthamanga kwapamwamba komanso kutsika kwa carbonization zokolola za omwe sali oyembekezera ndi chimodzi mwa zifukwa zofunika kwambiri zamtengo wapatali wa C / C zopangira zinthu. Kupititsa patsogolo kagwiridwe ka mimba sikungangowonjezera kupangika kwa zipangizo zamagulu a C / C ndikuchepetsa mtengo wake, komanso kukonzanso zinthu zosiyanasiyana za C / C zopangira. Chithandizo cha anti-oxidation cha C/C composite materials Carbon fiber imayamba kukhala oxidize pa 360 ° C mumlengalenga. Ulusi wa graphite ndi wabwinoko pang'ono kuposa ulusi wa kaboni, ndipo kutentha kwake kwa okosijeni kumayamba kukhala oxidize pa 420 ° C. Kutentha kwa okosijeni kwa zinthu zophatikizika za C/C ndi pafupifupi 450°C. C / C zida zophatikizika ndizosavuta kwambiri kuti zikhale ndi oxidize mumlengalenga wotentha kwambiri wa okosijeni, ndipo kuchuluka kwa okosijeni kumachulukirachulukira ndikuwonjezeka kwa kutentha. Ngati palibe njira zotsutsana ndi okosijeni, kugwiritsidwa ntchito kwa nthawi yaitali kwa zipangizo zamagulu a C / C m'malo otentha kwambiri oxidative kungayambitse zotsatira zoopsa. Chifukwa chake, chithandizo cha anti-oxidation chazinthu zophatikizika za C / C chakhala gawo lofunikira kwambiri pakukonzekera kwake. Kuchokera pamalingaliro aukadaulo wa anti-oxidation, imatha kugawidwa muukadaulo wamkati wa anti-oxidation ndi ukadaulo wa anti-oxidation wokutira.

Chemical Vapor Phase

Chemical vapor deposition (CVD kapena CVI) ndikuyika kaboni mwachindunji m'mabowo opanda kanthu kuti akwaniritse cholinga chodzaza ma pores ndikuwonjezera kachulukidwe. Mpweya woyikidwa ndi wosavuta kujambulidwa, ndipo umagwirizana bwino ndi ulusi. Sichidzachepa panthawi ya re-carbonization ngati njira ya impregnation, ndipo mawonekedwe a thupi ndi makina a njirayi ndi abwino. Komabe, panthawi ya CVD, ngati mpweya waikidwa pamwamba pa chopanda kanthu, umalepheretsa mpweya kufalikira mu pores mkati. Mpweya woyikidwa pamwamba uyenera kuchotsedwa mwamakina ndiyeno kuzungulira kwatsopano kuyenera kuchitika. Pazinthu zakuda, njira ya CVD imakhalanso ndi zovuta zina, ndipo kuzungulira kwa njirayi ndikwatali kwambiri.