Ekhulwini lama-21, ngentuthuko yesayensi nobuchwepheshe, ulwazi, amandla, izinto zokwakha, ubunjiniyela bezinto eziphilayo sekuyizinsika ezine zokuthuthukiswa komkhiqizo wezenhlalo wanamuhla, i-silicon carbide ngenxa yezakhiwo zamakhemikhali ezizinzile, ukuqhuba okuphezulu kokushisa, i-coefficient yokwanda kokushisa okuncane, okuncane, ukumelana okuhle kokuguguleka, ubulukhuni obuphezulu, amandla aphezulu omshini, ukumelana nokugqwala kwamakhemikhali nezinye izici, ukuthuthukiswa okusheshayo emkhakheni wezinto zokwakha, Kusetshenziswa kabanzi kuma-bearings ebhola le-ceramic, ama-valve, izinto ze-semiconductor, i-gyro, ithuluzi lokulinganisa, i-aerospace kanye neminye imikhakha.
Izitsha zobumba ze-silicon carbide zakhiwe kusukela ngawo-1960. Ngaphambilini, i-silicon carbide yayisetshenziswa kakhulu ezintweni zokugaya zemishini kanye nezindawo zokungaguquguquki. Amazwe emhlabeni wonke abheka ukubaluleka okukhulu ekuthuthukisweni kwezitsha zobumba ezithuthukisiwe, futhi manje awaneliswa nje kuphela ngokulungiswa kwezitsha zobumba ze-silicon carbide zendabuko, ukukhiqizwa kwamabhizinisi ezitsha zobumba ezisezingeni eliphezulu kuthuthukiswa ngokushesha, ikakhulukazi emazweni athuthukile. Eminyakeni yamuva nje, izitsha zobumba zezigaba eziningi ezisekelwe kuzitsha zobumba ze-SIC ziye zavela ngokulandelana, zithuthukisa ukuqina namandla ezinto ze-monomer. Izinkambu ezine eziyinhloko ze-silicon carbide zokusetshenziswa, okungukuthi, izitsha zobumba ezisebenzayo, izinto zobumba ezithuthukisiwe, izinto zokubhula kanye nezinto zokusetshenziswa zensimbi.
I-silicon carbide ceramics inokumelana okuhle kakhulu nokuguguleka
I-silicon carbide ceramics lo mkhiqizo uhlolisisiwe futhi wanqunywa. Ukumelana nokuguguleka kwe-silicon carbide ceramics lo mkhiqizo ulingana nensimbi ye-manganese izikhathi ezingu-266, okulingana nensimbi ephezulu ye-chromium izikhathi ezingu-1741. Ukumelana nokuguguleka kuhle kakhulu. Kusengasonga imali eningi. I-silicon carbide ceramics ingasetshenziswa njalo iminyaka engaphezu kweyishumi.
I-silicon carbide ceramics inamandla aphezulu, ubulukhuni obuphezulu kanye nesisindo esincane
Njengohlobo olusha lwezinto, ukusetshenziswa kwe-silicon carbide ceramics lokhu kunamandla omkhiqizo aphezulu kakhulu, ubulukhuni obuphezulu, isisindo silula kakhulu, i-silicon carbide ceramics enjalo esetshenziswayo, ukufakwa kanye nokufakwa esikhundleni kwalokhu okungenhla kuzoba lula kakhulu.
Udonga lwangaphakathi lwe-silicon carbide ceramic lubushelelezi futhi aluvimbeli impuphu
I-silicon carbide ceramics lo mkhiqizo ushiswa ngemuva kokushisa okuphezulu, ngakho-ke isakhiwo se-silicon carbide ceramics siminyene, ubuso bubushelelezi, ubuhle bokusetshenziswa buzoba ngcono kakhulu, ngakho-ke uma sisetshenziswa emndenini, ubuhle buzoba ngcono kakhulu.
Izindleko ze-silicon carbide ceramics ziphansi
Izindleko zokukhiqiza i-silicon carbide ceramics ngokwazo ziphansi kakhulu, ngakho-ke akudingeki sithenge intengo ye-silicon carbide ceramics ibiza kakhulu, ngakho-ke emndenini wethu, kodwa futhi kungonga imali eningi.
Isicelo se-silicon carbide ceramic:
Ibhola le-ceramic le-silicon carbide
Ibhola le-ceramic le-silicon carbide linezakhiwo ezinhle kakhulu zomshini, ukumelana okuhle kakhulu kwe-oxidation, ukumelana okuphezulu kokuguguleka kanye ne-coefficient ephansi yokungqubuzana. Ibhola le-ceramic le-silicon carbide amandla aphezulu okushisa, izinto ezivamile ze-ceramic ku-1200 ~ 1400 degrees Celsius amandla azoncishiswa kakhulu, kanti i-silicon carbide ku-1400 degrees Celsius amandla okugoba asagcinwa ezingeni eliphakeme lama-500 ~ 600MPa, ngakho-ke izinga lokushisa layo lokusebenza lingafinyelela ku-1600 ~ 1700 degrees Celsius.
Izinto ezihlanganisiwe ze-silicon carbide
Ama-silicon carbide matrix composites (SiC-CMC) asetshenziswe kabanzi emkhakheni wezindiza ngenxa yezakhiwo zawo zokushisa okuphezulu ngenxa yokuqina kwawo okuphezulu, amandla aphezulu kanye nokumelana okuhle kakhulu kwe-oxidation. Inqubo yokulungiselela i-SiC-CMC ifaka phakathi i-fiber preforming, ukwelashwa kokushisa okuphezulu, i-mesophase coating, i-matrix densification kanye ne-post-treatment. I-carbon fiber enamandla aphezulu inamandla aphezulu kanye nokuqina okuhle, kanti umzimba owenziwe ngaphambilini owenziwe ngawo unezakhiwo ezinhle zemishini.
Ukugqoka i-Mesophase (okungukuthi, ubuchwepheshe be-interface) ubuchwepheshe obuyinhloko enqubweni yokulungiselela, ukulungiswa kwezindlela zokugqoka i-mesophase kufaka phakathi i-chemical vapor osmosis (CVI), i-chemical vapor deposition (CVD), indlela ye-sol-sol (Sol-gcl), indlela ye-polymer impregnation cracking (PLP), efaneleke kakhulu ekulungiseleleni ama-composites e-silicon carbide matrix yi-CVI method kanye ne-PIP method.
Izinto zokumboza i-interfacial zifaka phakathi i-pyrolytic carbon, i-boron nitride kanye ne-boron carbide, phakathi kwazo i-boron carbide njengohlobo lokumelana nokubola kwe-oxidation, ukumboza i-interfacial kuye kwanakwa kakhulu. I-SiC-CMC, evame ukusetshenziswa ezimweni zokubola isikhathi eside, idinga futhi ukwelashwa kokumelana nokubola, okungukuthi, ungqimba lwe-silicon carbide ende enobukhulu obungaba ngu-100μm lufakwa ebusweni bomkhiqizo ngenqubo ye-CVD ukuze kuthuthukiswe ukumelana kwayo nokubola kwe-oxidation ekushiseni okuphezulu.
Isikhathi sokuthunyelwe: Feb-14-2023