Kugadzirira zvinhu zvakagadzirwa necarbon fiber

Pfupiso yeCarbon-Carbon Composite Materials

Zvinhu zvakasanganiswa nekabhoni/kabhoni (C/C)chinhu chakasimbiswa nefiber yekabhoni chine hunhu hwakanaka hwakadai sesimba guru uye modulus, simba regiravhiti rakati wandei, simba diki rekuwedzera kupisa, kuramba ngura, kuramba kupisa kuvhunduka, kuramba kukweshana kwakanaka, uye kugadzikana kwakanaka kwemakemikari. Imhando itsva yezvinhu zvakabatanidzwa pakupisa kwakanyanya.

Zvinhu zvakasanganiswa zveC/Cchinhu chakanaka kwazvo chinoshanda seinjiniya chakabatanidzwa nechimiro chekupisa. Kufanana nezvimwe zvinhu zvine simba guru, ichimiro chine simba chakagadzirwa nechikamu chakasimbiswa nefiber uye chikamu chekutanga. Musiyano ndewekuti chikamu chakasimbiswa nechikamu chekutanga zvinoumbwa nekabhoni yakachena ine hunhu hwakakosha.

Zvinhu zvakasanganiswa nekabhoni/kabhoniZvinonyanya kugadzirwa nekabhoni yakaputirwa, jira rekabhoni, fiber yekabhoni sekusimbisa, uye vapor yakaiswa kabhoni sematrix, asi ine chinhu chimwe chete, icho kabhoni. Kuti iwedzere huwandu, kabhoni inogadzirwa nekabhoni inoputirwa nekabhoni kana kuti inoputirwa neresin (kana asphalt), kureva kuti, zvinhu zvakagadzirwa nekabhoni/kabhoni zvinogadzirwa nezvinhu zvitatu zvekabhoni.

Maitiro ekugadzira zvinhu zvakagadzirwa nekabhoni-kabhoni

1) Sarudzo yefaibha yekabhoni

Kusarudzwa kwemapaketi efaibha yekabhoni uye dhizaini yemachira efaibha ndizvo hwaro hwekugadziraC/C yakasanganiswaHunhu hwemakanika uye hunhu hwethermophysical hweC/C composites zvinogona kutsanangurwa nekusarudza zvine musoro mhando dzefiber uye parameters dzekuruka machira, zvakaita sekutarisa kurongeka kweyard bundle, spacing yeyard bundle, huwandu hweyard bundle, nezvimwewo.

2) Kugadzirira carbon fiber preform

Kabhoni fiber preform inoreva gomba risina chinhu rinoumbwa kuita chimiro chinodiwa chefiber zvichienderana nechimiro chechigadzirwa uye zvinodiwa pakuita kuti iite maitiro ekuwedzera simba. Kune nzira nhatu huru dzekugadzirisa zvikamu zvechimiro zvakagadzirwa kare: nyoro, nyoro uye nyoro uye dzakasanganiswa. Maitiro makuru ekuruka ndeaya: nyoro yeshinda yakaoma, kurongeka kweboka retsvimbo yakapinzwa, kupunzika kwakanaka, kumonera fiber uye mativi matatu emativi akawanda. Parizvino, maitiro makuru ekuruka anoshandiswa muzvinhu zveC composite ndeyekuruka kwemativi matatu. Munguva yekuruka, shinda dzese dzakarukwa dzakarongwa nenzira yakati. Fiber yega yega inogadziriswa nekona yakati munzira yayo uye inorukwa pamwe chete kuti igadzire jira. Hunhu hwayo ndehwekuti inogona kugadzira jira remativi matatu, iro rinogona kudzora huwandu hwefibers munzira yega yega yezvinhu zveC/C composite, kuitira kuti zvinhu zveC/C composite zvigone kushandisa hunhu hwemakanika hwakanaka munzira dzese.

3) Maitiro ekuwedzera huwandu hweC/C

Kuwanda uye kushanda zvakanaka kwe densification zvinonyanya kukanganiswa nemaumbirwo ejira uye ma process parameters e base material. Nzira dze process dziri kushandiswa parizvino dzinosanganisira impregnation carbonization, chemical vapor deposition (CVD), chemical vapor infiltration (CVI), chemical liquid deposition, pyrolysis nedzimwe nzira. Kune mhando mbiri huru dze processing methods: impregnation carbonization process uye chemical vapor infiltration process.

Kuiswa kwechikamu chemvura-carbonization

Nzira yekuisa mushonga wechikamu chemvura iri nyore kushandisa mumichina uye inoshanda zvakanyanya, saka nzira yekuisa mushonga wechikamu chemvura inzira yakakosha yekugadzira zvinhu zvinosanganisa C/C. Ndeyekunyika preform yakagadzirwa nekabhoni fiber mu liquid impregnant, uye kuita kuti pregnant ipinde zvizere mu voids ye preform nekudzvanya, uye kuburikidza nematanho akasiyana-siyana akadai sekuporesa, carbonization, uye graphitization, pakupedzisira kuwanaZvinhu zvakasanganiswa zveC/C. Dambudziko rayo nderekuti inoda kudzokororwa kwekuisa carbonization uye kutenderera kwecarbonization kuti iwane zvinodiwa zve density. Kuumbwa uye chimiro cheimpregnant munzira yekuisa carbonization ye liquid phase zvakakosha zvikuru. Hazvingokanganisi chete kushanda kwe densification, asiwo zvinokanganisa hunhu hwemakanika uye hwepanyama hwechigadzirwa. Kuvandudza goho re carbonization reimpregnant uye kuderedza viscosity yeimpregnant kwagara kuri chimwe chezvinhu zvakakosha kugadziriswa pakugadzirira C/C composite materials nenzira yekuisa carbonation ye liquid phase. Viscosity yakakwira uye goho re carbonization rakaderera reimpregnant ndechimwe chezvikonzero zvakakosha zvekudhura kwepamusoro kwezvinhu zveC/C composite. Kuvandudza mashandiro eimpregnant hakungogone kuvandudza kushanda kwekugadzira zvinhu zveC/C composite uye kuderedza mutengo wazvo, asiwo kuvandudza hunhu hwakasiyana hwezvinhu zveC/C composite. Kurapa kweC/C composite materials Anti-oxidation Carbon fiber inotanga kuoxidation pa360°C mumhepo. Graphite fiber iri nani zvishoma pane carbon fiber, uye tembiricha yayo ye oxidation inotanga kuoxidation pa420°C. Kupisa kweokisijeni kwezvinhu zvakagadzirwa neC/C zvinenge 450°C. Zvinhu zvakagadzirwa neC/C zviri nyore kwazvo kuokisijeni mumhepo ine oxidative inopisa zvakanyanya, uye mwero weoxidation unowedzera nekukurumidza nekuwedzera kwekupisa. Kana pasina matanho ekudzivirira oxidation, kushandiswa kwenguva refu kwezvinhu zvakagadzirwa neC/C munzvimbo ine oxidative inopisa zvakanyanya kuchazokonzera migumisiro yakaipa. Nokudaro, kurapwa kweC/C composite zvinhu zvekudzivirira oxidation kwave chikamu chakakosha chegadziriro yayo. Kubva pamaonero etekinoroji yekudzivirira oxidation, inogona kukamurwa kuita tekinoroji yekudzivirira oxidation yemukati uye tekinoroji yekudzivirira oxidation.

Chikamu cheUtsi hweKemikari

Kuisa carbon mumhepo (CVD kana CVI) kunoreva kuisa kabhoni zvakananga mumaburi enzvimbo isina chinhu kuti zvizadzise chinangwa chekuzadza maburi uye kuwedzera huwandu hwezvinhu. Kabhoni yakachengetwa iri nyore kuigadzira, uye inoenderana zvakanaka nefiber. Haizodziki panguva yekuisa kabhoni zvakare senzira yekuisa mudumbu, uye hunhu hwemuviri nehwemakanika hwenzira iyi huri nani. Zvisinei, panguva yekushandiswa kweCVD, kana kabhoni ikaiswa pamusoro penzvimbo isina chinhu, inodzivirira gasi kuti risapararire mumaburi emukati. Kabhoni yakaiswa pamusoro inofanira kubviswa nekabhoni uye ipapo kutenderera kutsva kwekuisa kunofanira kuitwa. Kune zvigadzirwa zvakakora, nzira yeCVD inewo mamwe matambudziko, uye kutenderera kwenzira iyi zvakare kwenguva refu.