[Incamake ibisobanuro] Umuvuduko wa Atmospheric wacumuyesilicon karbideni karbide idafite ibyuma ihujwe na silicon na karubone ya covalent, kandi ubukana bwayo ni ubwa kabiri nyuma ya karubide ya diyama na boron. Imiti yimiti ni SiC. Kirisiti itagira ibara, ubururu n'umukara mugaragara iyo oxyde cyangwa irimo umwanda.
Umuvuduko wa Atmospheric wacumuyesilicon karbideni karbide idafite ubutare hamwe na silicon na karuboni ya covalent, kandi ubukana bwayo ni ubwa kabiri nyuma ya karubide ya diyama na boron. Imiti yimiti ni SiC. Kirisiti itagira ibara, ubururu n'umukara mugaragara iyo oxyde cyangwa irimo umwanda. Guhindura kwasilicon karbiden'imiterere ya diyama muri rusange yitwa emery. Ubukomere bwa emery buri hafi ya diyama, ituje neza yubushyuhe, ihamye kuri hydroxy acide yumuti wamazi hamwe na acide sulfurike yibanze, kandi ntigihinduka kuri aside ivanze cyangwa aside fosifori ya acide ya hydrogène yibanze hamwe na acide nitric. Alkalis ishonga mukirere cyuzuye iratandukanye. Igabanijemo ibicesilicon karbidekarbide isanzwe. Carbide isanzwe ya silicon, izwi nka karubone, iboneka cyane muri kimberlite na amphibolite y’ibirunga, ariko ingano yayo ni nto kandi nta gaciro ifite.
Inganda zo mu kirere inganda zacumuyesilicon karbideni uruvange rwa -SiC na -SiC kandi ruza mu mabara abiri: umukara n'icyatsi. Carbide nziza ya silicon idafite ibara, irimo umwanda ni umukara, icyatsi, ubururu, umuhondo. Imipaka ya mpande esheshatu na cubic, kristu ni isahani, inkingi. Ikirahure cy'ikirahure, ubucucike 3.17-3.47G / CM3, ubukana bwa Morse 9.2, microscope nayo kuri 30380 ~ 33320MPa gushonga: ikirere 2050 cyatangiye gutandukana, ikirere cyo gukira 2600 cyatangiye gutandukana. Coefficient ya elastique ni 466, 480MPa. Imbaraga zingana ni 171.5MPa. Imbaraga zo guhonyora ni 1029MPa. Coefficient yo kwagura umurongo ni (25 ~ 1000) 5.010 ~ 6 /, naho ubushyuhe bwumuriro (20) ni 59w / (mk). Imiti ihamye, itetse muri HCI, H2SO4, HF ntizangirika.
Ukurikije uburyo butandukanye, umuvuduko wikirere wacumuye karubide ya silicon igabanijwemo amakuru yangiza, yanga, deoxidizer, carbide yamashanyarazi nibindi. Ibicuruzwa bya SiC bya karibide ya silicon ntishobora kuba munsi ya 98%. Amashanyarazi hamwe na karubide ya silicon igabanijwemo: (1) amakuru yambere yoguhindura amakuru yumukara wa silicon karbide, ibiyirimo bya SiC birasa neza no gusya karubide ya silicon. . . Ibiri muri karubide ya silicon na SiC bikoreshwa muri deoxidizer muri rusange birasabwa kuba hejuru ya 90%. Nyamara, karubone yinganda zikoreshwa mu itanura, karibide ya silikoni irenga 45% yubuvuzi irashobora kandi gukoreshwa nka deoxidizer ikora ibyuma. Silicon karbide ya deoxidizing agent ifite ubwoko bubiri bwifu ya porojeri hamwe na blocing. Powder deoxidizer karbide yumukara wa silicon mubusanzwe ifite ingano ya mm 4 ~ 0.5 mm na 0.5 ~ 0.1 mm. Amashanyarazi akoreshwa na silicon karbide afite ibyiciro bibiri byingenzi. . .
Gukoresha umuvuduko wikirere wacumuye silicon karbide
Umuvuduko wa Atmospheric wacumuye ibicuruzwa bya silicon karbide bifite imirimo yihariye nko kurwanya ubushyuhe bwinshi, kurwanya ubushyuhe, kurwanya ubushyuhe, kurwanya umuriro, kurwanya imirasire, amashanyarazi meza n’ubushyuhe, nibindi, kandi byakoreshejwe cyane mubice bitandukanye byubukungu bwigihugu. Mubushinwa, karbide yicyatsi kibisi ikoreshwa cyane cyane. Carbide yumukara wa silicon ikoreshwa mugukora amabuye yo gusya, akenshi akoreshwa mugukata no gusya ibikoresho bifite imbaraga nkeya, nk'ikirahure, ububumbyi, amabuye, inganda, ndetse no gusya ibyuma bikozwe mubyuma hamwe nibikoresho byuma bidafite fer. Gusya bikozwe mu cyatsi kibisi cya silicon bikoreshwa cyane mu gusya karbide ya sima, titanium alloy, ikirahure cya optique, ndetse no gusya ibyuma bya silinderi nibikoresho byihuta byihuta. Cubic silicon carbide abrasives ikoreshwa gusa mugusya ultra-precision yo gusya miniature. Kwambara kwimyuka ya turbine birashobora kunozwa cyane ukoresheje ifu ya SIC kuri bo ukoresheje amashanyarazi. Ukoresheje ingufu za mashini kugirango usunike cubic SiC200 hamwe na W28 micro-ifu kurukuta rwa silinderi ya moteri yaka imbere, ubuzima bwa silinderi burashobora gukuba kabiri.
Igihe cyo kohereza: Ukwakira-11-2023