I-silicon carbide ecindezelwe umoya iyi-carbide engeyona insimbi enesibopho se-silicon ne-carbon covalent, futhi ubulukhuni bayo bulandela idayimane ne-boron carbide. Ifomula yamakhemikhali yi-SiC. Amakristalu angenambala, aluhlaza okwesibhakabhaka nomnyama uma exutshwe noma equkethe ukungcola. Ukuguqulwa kwe-silicon carbide enesakhiwo sedayimane ngokuvamile kubizwa ngokuthi i-emery. Ubulukhuni be-emery buseduze nedayimane, ukuzinza okuhle kokushisa, isisombululo samanzi esizinzile se-hydroxy acid kanye ne-sulfuric acid egxilile, futhi engazinzile ne-acid exubile noma i-phosphoric acid ye-hydrogen acid egxilile kanye ne-nitric acid. Ama-alkali ancibilika emoyeni ongenalutho ayahluka. Ihlukaniswe nge-silicon carbide yokwenziwa kanye ne-silicon carbide yemvelo. I-silicon carbide yemvelo, eyaziwa ngokuthi i-carbonite, itholakala kakhulu ku-kimberlite kanye ne-volcanic amphibolite, kodwa inani layo lincane futhi alinalo inani lokumba.
I-silicon carbide ehlanganisiwe yengcindezi yomoya yezimboni iyinhlanganisela ye--SiC kanye ne--SiC futhi iza ngemibala emibili: emnyama neluhlaza okotshani. I-silicon carbide emsulwa ayinambala, iqukethe ukungcola okumnyama, okuluhlaza okotshani, okuluhlaza okwesibhakabhaka, okuphuzi. Imingcele yezinhlamvu ze-hexagonal kanye ne-cubic, ikristalu iyipuleti, ikholomu ehlanganisiwe. Ukukhanya kwengilazi, ubuningi 3.17 ~ 3.47G/CM3, ubulukhuni be-Morse 9.2, i-microscope nayo ikwi-30380 ~ 33320MPa iphuzu lokuncibilika: i-atmospheric 2050 yaqala ukuhlukanisa, i-recovery atmosphere 2600 yaqala ukuhlukanisa. I-elastic coefficient ingu-466,480 MPa. Amandla okudonsa angu-171.5MPa. Amandla okucindezela angu-1029MPa. I-linear expansion coefficient ingu-(25 ~ 1000)5.010 ~ 6/. I-thermal conductivity (20) ingu-59w/(mk). Ukuqina kwamakhemikhali, okubila ku-HCl, i-H2SO4, i-HF ngeke iguge.
Ngokwezindlela ezahlukene zokusetshenziswa, i-silicon carbide ecindezelwe umoya ihlukaniswe yaba idatha ebukhali, ebukhali, i-deoxidizer, i-silicon carbide kagesi njalo njalo. Okuqukethwe kwe-SiC kwe-silicon carbide ebukhali akumele kube ngaphansi kuka-98%. I-silicon carbide ebukhali ihlukaniswe yaba: (1) idatha ebukhali ethuthukisiwe ye-silicon carbide emnyama, okuqukethwe kwayo kwe-SiC kufana ncamashi ne-silicon carbide yokugaya. (2) Idatha yesibili ebukhali ye-silicon carbide emnyama, okuqukethwe kwe-SiC okungaphezu kuka-90%. (3) Okuqukethwe kwe-silicon carbide emnyama ne-SiC ezindaweni ezibukhali eziphansi akungaphansi kuka-83%. Okuqukethwe kwe-silicon carbide ne-SiC esetshenziswa ku-deoxidizer ngokuvamile kudingeka kube ngaphezu kuka-90%. Kodwa-ke, ukufudumeza kwe-carbon industrial graphitization furnace, okuqukethwe kwe-silicon carbide okungaphezu kuka-45% kokwelashwa nakho kungasetshenziswa njenge-deoxidizer yokwenza insimbi. I-Silicon carbide ye-deoxidizing agent inezinhlobo ezimbili zesimo sempuphu kanye ne-molding block. I-powder deoxidizer black silicon carbide ngokuvamile inosayizi wezinhlayiya ongu-4 ~ 0.5 mm kanye no-0.5 ~ 0.1 mm.
I-silicon carbide kagesi inezigaba ezimbili eziyinhloko
(1) I-silicon carbide eluhlaza esetshenziselwa izinto zokushisa zikagesi ifana kakhulu ne-silicon carbide eluhlaza esetshenziselwa ukugaya.
(2) I-silicon carbide ye-arrester inezidingo ezikhethekile zomsebenzi kagesi, ehlukile ku-black silicon carbide yokugaya idatha ephikisayo.
Ukusetshenziswa kwe-silicon carbide ecindezelwe umoya
Imikhiqizo ye-silicon carbide eshisiwe ngengcindezi yomoya inemisebenzi ekhethekile efana nokumelana nokushisa okuphezulu, ukumelana nokuguguleka, ukumelana nokushisa, ukumelana nomlilo, ukumelana nemisebe, ukuhanjiswa kukagesi nokushisa okuhle kakhulu, njll., futhi isetshenziswe kabanzi eminyangweni ehlukahlukene yomnotho kazwelonke. E-China, i-silicon carbide eluhlaza isetshenziswa kakhulu njengesithako sokuguguleka. I-black silicon carbide isetshenziselwa ukwenza amatshe okugaya, avame ukusetshenziselwa ukusika nokugaya izinto ezinamandla aphansi okudonseka, njengengilazi, izinto zobumba, itshe, izinto zokungaguquki, kanye nokugaya izingxenye zensimbi ezibunjiwe kanye nezinto zensimbi ezingezona i-ferrous. Ukugaya okwenziwe nge-green silicon carbide kusetshenziselwa kakhulu ukugaya i-cemented carbide, i-titanium alloy, ingilazi ebonakalayo, kanye nokugaya i-cylinder liner kanye namathuluzi ensimbi asheshayo. Ama-abrasives e-cubic silicon carbide asetshenziswa kuphela ekugayeni okunembe kakhulu kwama-miniature bearings. Ukumelana nokuguguleka kwama-turbine impellers kungathuthukiswa kakhulu ngokusebenzisa i-SIC powder kuzo ngokushaya nge-electroplating. Ukusebenzisa ingcindezi yomshini ukusunduza isigayo se-cubic SiC200 kanye ne-W28 micro-powder odongeni lwesilinda lwenjini yokushisa yangaphakathi, impilo yesilinda ingaphindaphindwa kabili.
Isikhathi sokuthunyelwe: Juni-16-2023