Inkqubo yokulungiswa kwezinto ezidibeneyo ze-carbon fiber

Isishwankathelo seMathiriyeli yeCarbon-Carbon Composite

Ikhabhoni / ikhabhoni (C / C) imathiriyeli edibeneyoyi-carbon fiber eyomeleziweyo yezinto ezidibeneyo kunye noluhlu lweempawu ezibalaseleyo ezifana namandla aphezulu kunye ne-modulus, ubunzima obucacileyo obucacileyo, i-coefficient encinci ye-thermal yokwandisa, ukuxhathisa ukubola, ukuxhathisa ukothuka kwe-thermal, ukuxhathisa okulungileyo kwi-friction, kunye nokuzinza okulungileyo kweekhemikhali. Luhlobo olutsha lwezinto ezihlanganisiweyo zobushushu obuphezulu.

C/C imathiriyeli edibeneyoyeyona nto ibalaseleyo yolwakhiwo lwe-thermal-isebenzayo edibeneyo yobunjineli. Njengezinye izinto eziphezulu zokusebenza ezidibeneyo, yinkqubo edibeneyo ehlanganiswe nesigaba sokuqinisa i-fiber kunye nesigaba esisisiseko. Umahluko kukuba zombini isigaba esomeleziweyo kunye nesigaba esisisiseko senziwe ngekhabhoni ecocekileyo eneempawu ezizodwa.

Iimathiriyeli zekhabhoni/ikhabhoni edityanisiweyoubukhulu becala zenziwe ngekhabhoni ezivayo, ilaphu lekhabhoni, ifayibha yekhabhoni njengokuqinisa, kunye nomphunga ofakwe kwikhabhoni njengematrix, kodwa inento enye kuphela, eyikhabhoni. Ukuze kwandiswe ukuxinana, i-carbon eyenziwa yi-carbonization ifakwe kwikhabhoni okanye ifakwe kwi-resin (okanye i-asphalt), oko kukuthi, izinto zekhabhoni / i-carbon composite zenziwe ngezinto ezintathu zekhabhoni.

Inkqubo yokuvelisa izinto ezidibeneyo ze-carbon-carbon

1) Ukukhethwa kwe-carbon fiber

Ukukhethwa kwee-carbon fiber bundles kunye noyilo lwesakhiwo seelaphu zefiber zisisiseko sokuvelisaC/C indibaniselwano. Iipropati zomatshini kunye neempawu ze-thermophysical ze-C / C ze-composites zinokumiselwa ngokukhetha ngokufanelekileyo iintlobo zefayibha kunye neeparamitha zokuluka ilaphu, ezifana nokuqhelaniswa nokuhlelwa kwe-bundle, izithuba zemisonto, umthamo wevolumu yelaphu, njl.

2) Ukulungiswa kwe-carbon fiber preform

I-Carbon fiber preform ibhekisa kwindawo engenanto eyilwe kwimilo efunekayo yefayibha ngokwemilo yemveliso kunye neemfuno zokusebenza ukuze kuqhutywe inkqubo yoxinaniso. Kukho iindlela ezintathu eziphambili zokusetyenzwa kweendawo ezakhiwe kwangaphambili: ukuluka okuthambileyo, ukwaluka okuqinileyo kunye nokwaluka okuthambileyo kunye nokuqina okuxubeneyo. Ezona nkqubo ziphambili zokulukwa zezi: ukuluka umsonto owomileyo, ulungelelwaniso lweqela lezintonga ezimiliselwe ngaphambili, ukugqabhuka okucolekileyo kokulukwa, ukusonteka kwefiber kunye nokulukwa okunamacala amathathu okumacala maninzi. Okwangoku, eyona nkqubo yokulukwa isetyenziswa kwimathiriyeli ye-C edibeneyo yi-three-dimensional general multi-directional weaving. Ebudeni benkqubo yokuluka, yonke imicu elukiweyo ilungelelaniswe kwicala elithile. Ifiber nganye ithotywa kwi-engile ethile ecaleni kwayo kwaye idityaniswe enye nenye ukwenza ilaphu. Uphawu lwayo kukuba luyakwazi ukwenza i-three-dimensional multi-directional jikelele, ekwazi ukulawula ngokufanelekileyo umthamo we-fibers kwicala ngalinye lezinto ezidibeneyo zeC / C, ukwenzela ukuba izinto ezidibeneyo zeC / C zisebenzise iimpawu ezifanelekileyo zomatshini. macala onke.

3) Inkqubo yoxinaniso lweC/C

Iqondo kunye nokusebenza kakuhle koxinaniso kuchaphazeleka kakhulu kwisakhiwo selaphu kunye neeparitha zenkqubo yezinto ezisisiseko. Iindlela zenkqubo ezisetyenziswayo ngoku zibandakanya impregnation carbonization, chemical vapor deposition (CVD), chemical vapor infiltration (CVI), chemical deposition deposition, pyrolysis kunye nezinye iindlela. Kukho iintlobo ezimbini eziphambili zeendlela zenkqubo: inkqubo ye-carbonization ye-impregnation kunye nenkqubo yokungena kwe-chemical vapor.

Isigaba solwelo lokumiliselwa-carbonization

Indlela yokufakwa kwesigaba solwelo ilula kwisixhobo kwaye inokusebenza ngokubanzi, ngoko ke indlela yokufakwa kwesigaba solwelo yindlela ebalulekileyo yokulungiselela imathiriyeli edibeneyo yeC/C. Kukuntywilisela i-preform eyenziwe nge-carbon fiber kwi-liquid impregnant, kwaye wenze umntu okhulelweyo angene ngokupheleleyo kwi-voids ye-preform ngoxinzelelo, kwaye emva koko ngoluhlu lweenkqubo ezifana nokunyanga, i-carbonization, kunye ne-graphitization, ekugqibeleni ifumane.C/C imathiriyeli edibeneyo. Ukungalungi kwayo kukuba kuthatha ukukhulelwa okuphindaphindiweyo kunye nemijikelezo ye-carbonization ukufezekisa iimfuno zoxinaniso. Ukubunjwa kunye nesakhiwo somntwana okhulelweyo kwindlela yokukhulelwa kwesigaba solwelo kubaluleke kakhulu. Ayichaphazeli nje kuphela ukusebenza kakuhle koxinaniso, kodwa iphinda ichaphazele iipropathi zoomatshini nezomzimba zemveliso. Ukuphucula imveliso ye-carbonization yomntwana okhulelweyo kunye nokunciphisa i-viscosity yomntwana okhulelweyo kuye kwahlala enye yezinto eziphambili eziza kusonjululwa ekulungiseleleni izinto ezidibeneyo zeC / C nge-liquid phase impregnation method. I-viscosity ephezulu kunye nemveliso ephantsi ye-carbonization ye-impregnant yenye yezizathu ezibalulekileyo zeendleko eziphezulu ze-C / C zezinto ezidibeneyo. Ukuphucula ukusebenza komntu okhulelweyo akukwazi nje ukuphucula ukuveliswa kwemveliso yezinto ezidibeneyo zeC / C kunye nokunciphisa iindleko zabo, kodwa nokuphucula iimpawu ezahlukeneyo zeC / C izinto ezidibeneyo. Ukunyangwa kwe-Anti-oxidation ye-C / C yezinto ezidibeneyo ze-Carbon fiber iqala i-oxidize kwi-360 ° C emoyeni. Ifayibha yegraphite ingcono kancinane kunefayibha yekhabhoni, kwaye ubushushu bayo be-oxidation buqala ukuba yi-oxidize kuma-420°C. Ubushushu be-oxidation yemathiriyeli ehlanganisiweyo yeC/C imalunga ne-450°C. Izinto ezidibeneyo zeC / C zilula kakhulu kwi-oxidize kwi-high-temperature oxidative atmosphere, kwaye izinga le-oxidation landa ngokukhawuleza ngokunyuka kweqondo lokushisa. Ukuba akukho manyathelo okulwa ne-oxidation, ukusetyenziswa kwexesha elide lezinto ezidibeneyo zeC / C kwindawo ephezulu yokushisa kwe-oxidative kuya kubangela imiphumo emibi. Ke ngoko, unyango lwe-anti-oxidation lwezixhobo ezihlanganisiweyo zeC / C lube yinxalenye eyimfuneko kwinkqubo yalo yokulungiselela. Ngokombono weteknoloji ye-anti-oxidation, inokwahlulwa ibe yitekhnoloji yangaphakathi ye-anti-oxidation kunye ne-anti-oxidation coating technology.

Isigaba soMphunga weMichiza

I-Chemical vapor deposition (i-CVD okanye i-CVI) kukubeka i-carbon ngokuthe ngqo kwi-pores ye-blank ukufezekisa injongo yokuzalisa ii-pores kunye nokwandisa ubuninzi. Ikhabhoni efakiweyo ilula ukwenza igraphitize, kwaye inokuhambelana kakuhle ngokomzimba kunye nefiber. Ayiyi kuncipha ngexesha lokuphinda i-carbonization njengendlela yokukhulelwa, kwaye iimpawu zomzimba kunye nomatshini wale ndlela zingcono. Nangona kunjalo, ngexesha lenkqubo ye-CVD, ukuba i-carbon ifakwe phezu kwendawo engenanto, iya kuthintela igesi ukuba isasazeke kwi-pores yangaphakathi. Ikhabhoni efakwe kumphezulu kufuneka isuswe ngoomatshini kwaye emva koko umjikelo omtsha wokubekwa kufuneka uqhutywe. Kwiimveliso ezityebileyo, indlela ye-CVD nayo inobunzima obuthile, kwaye umjikelo wale ndlela nawo ude kakhulu.