Ekhulwini lama-21, kanye nokuthuthukiswa kwesayensi nobuchwepheshe, ulwazi, amandla, izinto zokwakha, ubunjiniyela bezinto eziphilayo bube yizinsika ezine zokuthuthukiswa kokukhiqiza kwezenhlalakahle zanamuhla, i-silicon carbide ngenxa yezakhiwo zamakhemikhali ezizinzile, ukushisa okuphezulu kwe-thermal, i-coefficient yokwandisa ukushisa ukuminyana okuncane, okuncane, ukumelana okuhle kokugqokwa, ubulukhuni obukhulu, amandla aphezulu emishini, ukumelana nokugqwala kwamakhemikhali nezinye izici, intuthuko ngokushesha emkhakheni wezinto zokwakha, Isetshenziswa kabanzi ku-ceramic. ama-ball bearings, ama-valve, izinto zokwakha ze-semiconductor, i-gyro, insimbi yokulinganisa, i-aerospace kanye neminye imikhakha.
I-silicon carbide ceramics yakhiwe kusukela ngawo-1960. Phambilini, i-silicon carbide yayisetshenziswa kakhulu ezintweni zokugaya ngomshini kanye nama-refractories. Amazwe emhlabeni wonke anamathisela ukubaluleka okukhulu ekuthuthukisweni kwezimboni zezitsha zobumba ezithuthukisiwe, futhi manje awanelisekile kuphela ngokulungiswa kwe-silicon carbide ceramics yendabuko, ukukhiqizwa kwamabhizinisi e-ceramics athuthukile ngokushesha, ikakhulukazi emazweni athuthukile. Eminyakeni yamuva nje, ama-ceramics ezigaba eziningi asekelwe kuma-ceramics e-SIC avele ngokulandelana, athuthukisa ukuqina namandla ezinto zokwakha ze-monomer. I-silicon carbide imikhakha emine yokusetshenziswa, okungukuthi, izitsha zobumba ezisebenzayo, izinto ezithuthukisiwe eziphikisayo, ama-abrasives kanye nezinto zokusetshenziswa ze-metallurgical.
I-silicon carbide ceramics inokumelana okuhle kakhulu nokugqoka
I-silicon carbide ceramics lo mkhiqizo uhlolisisiwe futhi wanqunywa. Ukumelana nokugqokwa kwe-silicon carbide ceramics lo mkhiqizo ulingana nezikhathi ezingu-266 zensimbi ye-manganese, okulingana nezikhathi ezingu-1741 zensimbi ephezulu ye-chromium. Ukumelana nokugqoka kuhle kakhulu. Kusengasigcinela imali eningi. I-silicon carbide ceramics ingasetshenziswa ngokuqhubekayo iminyaka engaphezu kweyishumi.
I-silicon carbide ceramics inamandla amakhulu, ubulukhuni obukhulu kanye nesisindo esincane
Njengohlobo olusha lwezinto ezibonakalayo, ukusetshenziswa kwe-silicon carbide ceramics lo mkhiqizo wamandla aphezulu kakhulu, ubulukhuni obukhulu, isisindo sibuye silula kakhulu, i-silicon carbide ceramics esetshenziswayo esetshenziswayo, ukufakwa kanye nokushintshwa kwalokhu okungenhla kuzoba lula kakhulu.
Udonga lwangaphakathi lwe-silicon carbide ceramic lubushelelezi futhi aluvimbi impushana
I-silicon carbide ceramics lo mkhiqizo uxoshwa ngemuva kokushisa okuphezulu, ngakho-ke isakhiwo se-silicon carbide ceramics siminyene, ubuso bushelelezi, ubuhle bokusetshenziswa buyoba buhle kakhulu, ngakho-ke busetshenziswa emndenini, ubuhle buyoba buhle kakhulu.
Izindleko ze-silicon carbide ceramics ziphansi
Izindleko zokukhiqiza i-silicon carbide ceramics ngokwayo incane, ngakho-ke akudingeki sithenge intengo ye-silicon carbide ceramics ibiza kakhulu, ngakho-ke emndenini wethu, kodwa futhi ingagcina imali eningi.
Isicelo se-silicon carbide ceramic:
Ibhola le-silicon carbide ceramic
Ibhola le-Silicon carbide Ceramic linezakhiwo ezinhle kakhulu zemishini, ukumelana okuhle kakhulu kwe-oxidation, ukumelana okuphezulu kwe-abrasion kanye ne-coefficient ephansi yokungqubuzana. Ibhola le-silicon carbide ceramic ball amandla okushisa aphezulu, izinto ezivamile ze-ceramic ku-1200 ~ 1400 degrees Celsius amandla azoncishiswa kakhulu, futhi i-silicon carbide ku-1400 degrees Celsius amandla okugoba asagcinwa ezingeni eliphakeme lika-500 ~ 600MPa, ngakho izinga lokushisa layo lokusebenza lingafinyelela. 1600 ~ 1700 degrees Celsius.
Izinto ezihlanganisiwe ze-silicon carbide
Izinhlanganisela ze-silicon carbide matrix (SiC-CMC) zisetshenziswe kabanzi emkhakheni we-aerospace ngezakhiwo zazo ezishisayo ezishisayo ngenxa yokuqina kwazo okuphezulu, amandla aphezulu kanye nokumelana ne-oxidation okuhle kakhulu. Inqubo yokulungiselela i-SiC-CMC ihlanganisa i-fiber preforming, ukwelashwa kwezinga lokushisa eliphezulu, ukunamathela kwe-mesophase, ukuminyana kwe-matrix kanye nokwelashwa kwangemva kokwelashwa. I-carbon fiber enamandla amakhulu inamandla aphezulu kanye nokuqina okuhle, futhi umzimba owenziwe ngaphambili owenziwe ngawo unezakhiwo ezinhle zokusebenza.
I-Mesophase coating (okungukuthi, ubuchwepheshe be-interface) iwubuchwepheshe obuyinhloko ekulungiseni, ukulungiswa kwezindlela zokuhlanganisa i-mesophase zihlanganisa i-chemical vapor osmosis (CVI), i-chemical vapor deposition (CVD), indlela ye-sol-sol (Sol-gcl), i-polymer. impregnation cracking method (PLP), efaneleka kakhulu ekulungiseni izinhlanganisela ze-silicon carbide matrix yindlela ye-CVI kanye nendlela ye-PIP.
Izinto zokumboza ezihlanganisa ubuso zifaka i-pyrolytic carbon, i-boron nitride ne-boron carbide, phakathi kwayo i-boron carbide njengohlobo lokumelana ne-oxidation enamathelayo iye yanakwa kakhulu. I-SiC-CMC, evame ukusetshenziswa ezimeni ze-oxidation isikhathi eside, nayo idinga ukwelashwa ukumelana ne-oxidation, okungukuthi, ungqimba lwe-silicon carbide elicinene elinogqinsi olungaba ngu-100μm lifakwa ebusweni bomkhiqizo ngenqubo ye-CVD. ukuthuthukisa ukumelana kwayo ne-oxidation ephezulu lokushisa.
Isikhathi sokuthumela: Feb-14-2023