Inqubo yokulungiselela izinto ezihlanganisiwe ze-carbon fiber

Ukubuka Konke Kwezinto Ezihlanganisiwe Ze-Carbon-Carbon

Izinto ezihlanganisiwe zekhabhoni/khabhoni (C/C)iyinto ehlanganisiwe eqiniswe nge-carbon fiber enezici eziningi ezinhle kakhulu njengamandla aphezulu kanye ne-modulus, amandla adonsela phansi acacile, i-coefficient encane yokwandisa ukushisa, ukumelana nokugqwala, ukumelana nokushaqeka kokushisa, ukumelana okuhle kokungqubuzana, kanye nokuzinza okuhle kwamakhemikhali. Luhlobo olusha lwezinto ezihlanganisiwe zokushisa okuphezulu kakhulu.

Izinto ezihlanganisiwe ze-C/Ciyimpahla yobunjiniyela ehlanganisiwe esebenza kahle kakhulu futhi ehlanganisa isakhiwo sokushisa. Njengezinye izinto ezihlanganisiwe ezisebenza kahle kakhulu, iyisakhiwo esihlanganisiwe esakhiwe yisigaba esiqiniswe ngefayibha kanye nesigaba esiyisisekelo. Umehluko uwukuthi isigaba esiqinisiwe kanye nesigaba esiyisisekelo zakhiwe ngekhabhoni emsulwa enezakhiwo ezikhethekile.

Izinto ezihlanganisiwe zekhabhoni/khabhoniZenziwe kakhulu nge-carbon felt, indwangu yekhabhoni, i-carbon fiber njengokuqinisa, kanye ne-vapor deposited carbon njenge-matrix, kodwa inesici esisodwa kuphela, okuyikhabhoni. Ukuze kwandiswe ubuningi, ikhabhoni ekhiqizwa yi-carbonization ifakwa ngekhabhoni noma ifakwe nge-resin (noma i-asphalt), okungukuthi, izinto ezihlanganisiwe zekhabhoni/khabhoni zenziwe ngezinto ezintathu zekhabhoni.

Inqubo yokukhiqiza izinto ezihlanganisiwe zekhabhoni-khabhoni

1) Ukukhetha i-carbon fiber

Ukukhethwa kwezinqwaba ze-carbon fiber kanye nokwakheka kwesakhiwo sezindwangu ze-fiber kuyisisekelo sokukhiqizaInhlanganisela ye-C/C. Izakhiwo zemishini kanye nezakhiwo ze-thermophysical ze-C/C composites zinganqunywa ngokukhetha ngokunengqondo izinhlobo zefayibha kanye nemingcele yokweluka indwangu, njengokuqondiswa kokuhlelwa kwenqwaba yentambo, isikhala senqwaba yentambo, okuqukethwe kwevolumu yenqwaba yentambo, njll.

2) Ukulungiswa kwe-preform ye-carbon fiber

I-preform ye-carbon fiber ibhekisela endaweni engenalutho eyakhiwe yaba yisakhiwo esidingekayo se-fiber ngokuya ngesimo somkhiqizo kanye nezidingo zokusebenza ukuze kufezwe inqubo yokuqina. Kunezindlela ezintathu eziyinhloko zokucubungula izingxenye zesakhiwo ezenziwe ngaphambilini: ukuluka okuthambile, ukuluka okuqinile kanye nokuluka okuthambile nokuqinile. Izinqubo eziyinhloko zokuluka yilezi: ukuluka intambo eyomile, ukuhlelwa kweqembu lenduku efakwe ngaphambi kokufakwa, ukubhoboza ukuluka okuncane, ukugoqa i-fiber kanye nokuluka okubanzi okunezinhlangothi ezintathu. Njengamanje, inqubo yokuluka eyinhloko esetshenziswa ezintweni ezihlanganisiwe ze-C ukuluka okunezinhlangothi ezintathu okunezinhlangothi eziningi. Ngesikhathi senqubo yokuluka, zonke izintambo ezilukiwe zihlelwe ngendlela ethile. I-fiber ngayinye isuswa nge-engeli ethile eceleni kwendlela yayo futhi ihlanganiswe ukuze kwakhiwe indwangu. Isici sayo ukuthi ingakha indwangu ephelele enezinhlangothi ezintathu, engalawula ngempumelelo okuqukethwe kwevolumu yezintambo ohlangothini ngalunye lwezinto ezihlanganisiwe ze-C/C, ukuze izinto ezihlanganisiwe ze-C/C zikwazi ukusebenzisa izakhiwo zemishini ezifanele kuzo zonke izinhlangothi.

3) Inqubo yokuqinisa i-C/C

Izinga kanye nokusebenza kahle kokuqina komzimba kuthinteka kakhulu yisakhiwo sendwangu kanye nemingcele yenqubo yezinto eziyisisekelo. Izindlela zenqubo ezisetshenziswa njengamanje zifaka phakathi ukufakwa kwe-carbonization, ukufakwa kwe-chemical vapor (CVD), ukufakwa kwe-chemical vapor (CVI), ukufakwa kwe-chemical liquid, i-pyrolysis nezinye izindlela. Kunezinhlobo ezimbili eziyinhloko zezindlela zenqubo: inqubo yokufaka i-carbonization kanye nenqubo yokufaka i-chemical vapor.

Ukufakwa kwesigaba soketshezi-i-carbonization

Indlela yokufaka i-liquid phase ilula kakhulu emishinini futhi inokusetshenziswa okubanzi, ngakho-ke indlela yokufaka i-liquid phase iyindlela ebalulekile yokulungiselela izinto ezihlanganisiwe ze-C/C. Iwukufaka i-preform eyenziwe nge-carbon fiber ku-liquid impregnant, bese wenza i-impregnant ingene ngokuphelele ezimbotsheni ze-preform ngokucindezela, bese idlula ochungechungeni lwezinqubo ezifana nokwelapha, i-carbonization, kanye ne-graphitization, ekugcineni itholeIzinto ezihlanganisiwe ze-C/C. Ububi bayo ukuthi ithatha imijikelezo yokufutha ephindaphindwayo kanye ne-carbonization ukuze kufezwe izidingo zobuningi. Ukwakheka kanye nesakhiwo se-inpregnant endleleni yokufutha yesigaba soketshezi kubaluleke kakhulu. Akugcini nje ngokuthinta ukusebenza kahle kokuqina, kodwa futhi kuthinta izakhiwo zemishini nezomzimba zomkhiqizo. Ukuthuthukisa isivuno se-carbonization se-inpregnant kanye nokunciphisa i-viscosity ye-inpregnant bekulokhu kungenye yezinkinga ezibalulekile okufanele zixazululwe ekulungiseleleni izinto ezihlanganisiwe ze-C/C ngendlela yokufutha yesigaba soketshezi. I-viscosity ephezulu kanye nesivuno esiphansi se-carbonization se-inpregnant kungenye yezizathu ezibalulekile zezindleko eziphezulu zezinto ezihlanganisiwe ze-C/C. Ukuthuthukisa ukusebenza kwe-inpregnant akugcini nje ngokuthuthukisa ukusebenza kahle kokukhiqizwa kwezinto ezihlanganisiwe ze-C/C nokunciphisa izindleko zazo, kodwa futhi kuthuthukisa izakhiwo ezahlukahlukene zezinto ezihlanganisiwe ze-C/C. Ukwelashwa kwe-anti-oxidation kwezinto ezihlanganisiwe ze-C/C I-carbon fiber iqala ukufutha ku-360°C emoyeni. I-graphite fiber ingcono kancane kune-carbon fiber, futhi izinga lokushisa layo le-oxidation liqala ukufutha ku-420°C. Izinga lokushisa lokushiswa kwezinto ezihlanganisiwe ze-C/C licishe libe ngu-450°C. Izinto ezihlanganisiwe ze-C/C kulula kakhulu ukuzishiswa emoyeni oshisa kakhulu, futhi izinga lokushiswa likhuphuka ngokushesha ngokukhuphuka kwezinga lokushisa. Uma kungekho zindlela zokulwa nokushiswa, ukusetshenziswa kwesikhathi eside kwezinto ezihlanganisiwe ze-C/C endaweni eshisa kakhulu kuzodala imiphumela emibi ngokungenakugwenywa. Ngakho-ke, ukwelashwa kokushiswa kwezinto ezihlanganisiwe ze-C/C sekuyingxenye ebalulekile yenqubo yokulungiselela. Ngokombono wobuchwepheshe bokushiswa, ingahlukaniswa ngobuchwepheshe bangaphakathi bokushiswa kanye nobuchwepheshe bokumboza ukushiswa.

Isigaba Somusi Wekhemikhali

Ukufakwa komusi wamakhemikhali (i-CVD noma i-CVI) ukufaka ikhabhoni ngqo ezimbotsheni zesikhala ukuze kufezwe injongo yokugcwalisa izimbobo nokwandisa ubuningi. Ikhabhoni efakiwe kulula ukuyilinganisa, futhi ihambisana kahle ngokomzimba nefayibha. Ngeke inciphe ngesikhathi sokufakwa kabusha kwekhabhoni njengendlela yokufaka, futhi izakhiwo zomzimba nezemishini zale ndlela zingcono. Kodwa-ke, ngesikhathi senqubo ye-CVD, uma ikhabhoni ifakwa ebusweni besikhala, izovimbela igesi ukuthi ingasabalali iye ezimbotsheni zangaphakathi. Ikhabhoni efakwe ebusweni kufanele isuswe ngomshini bese kwenziwa umjikelezo omusha wokufakwa. Ngemikhiqizo ejiyile, indlela ye-CVD nayo inobunzima obuthile, futhi umjikelezo wale ndlela nawo mude kakhulu.