Reaction sintering silicon carbide inzira yakakosha yekugadzira yakakwira performance ceramic zvinhu. Iyi nzira inoshandisa kupisa kurapwa kwekabhoni uye nesilicon masosi pane yakanyanya tembiricha kuita kuti vatore kuumba silicon carbide ceramics.
1. Kugadzirira kwezvinhu zvakasvibiswa. Izvo zvigadzirwa zve reaction-sintered silicon carbide zvinosanganisira kabhoni sosi uye silicon sosi. Iyo kabhoni sosi inowanzoita kabhoni dema kana kabhoni-ine polymer, nepo iyo silicon sosi iine upfu silica. Izvi zvimisikidzwa zvinoda kupwanywa, kuvhenekwa uye kusanganiswa kuti ive yunifomu saizi, ukuwo uchidzora chimiro chazvo chemakemikari kuitira kuti uwane emhando yepamusoro silicon carbide ceramics panguva yekupisa.
2. Chimiro. Isa zvakasanganiswa mbishi muforoma yekuumba. Kune akawanda marudzi enzira dzekuumba, dzinowanzo shandiswa kuumba yekutsikirira uye jekiseni kuumba. Press molding ndiko kudzvanywa kwehupfu hwehupfu pasi pekumanikidzwa kuti aumbe, ukuwo jekiseni kuumba iri mbishi yakasanganiswa neinamira, inopfapfaidzwa muforoma kuburikidza nesirinji kuti iumbe. Mushure mekugadzira, zvinodikanwa kuita demoulding kurapwa kuti ubvise ceramic billet kubva mukuumbwa.
3. Kurapa kwekupisa. Iyo yakaumbwa yeceramic body inoiswa muchoto chekurapa kupisa kwekupisa. Iyo sintering process yakakamurwa kuita nhanho mbiri: carbonization nhanho uye sintering nhanho. Muchikamu checarbonization, muviri weceramic unopisa kusvika pakupisa kwakanyanya (kazhinji pamusoro pe1600 ° C) pasi pemhepo inert, uye iyo kabhoni sosi inopindirana nesilicon sosi kugadzira silicon carbide. Muchikamu chekupisa, tembiricha inosimudzwa kune tembiricha yepamusoro (kazhinji iri pamusoro pe1900 ° C), izvo zvinokonzeresa recrystallization uye densification pakati pesilicon carbide zvimedu. Nenzira iyi, kuwanda kweiyo silicon carbide muviri kunowedzera kuvandudzwa, nepo kuomarara uye kupfeka kuramba kunovandudzwa zvakare.
4. Kupedza. Iyo sintered ceramic body inoda kupedzwa kuti uwane iyo inodiwa chimiro uye saizi. Kupedzisa nzira dzinosanganisira kugaya, kucheka, kuchera, nezvimwewo Pamusana pekuoma kwakanyanya kwesilicon carbide zvinhu, zvakaoma kupedzisa, zvinoda kushandiswa kwepamusoro-soro yezvigadziro zvekugadzira uye zvigadzirwa zvekugadzirisa.
Muchidimbu, maitiro ekugadzira reaction-sintered silicon carbide anosanganisira kugadzirira kwezvakagadzirwa zvinhu, kuumba, kupisa kupisa uye kupedzisa. Pakati pavo, danho rakakosha inzira yekupisa yekupisa, kutonga kwayo kwakakosha kuwana yakakwirira-mhando yesilicon carbide zvinhu. Izvo zvinodikanwa kudzora tembiricha, mhepo, kubata nguva uye zvimwe zvinhu zvekupisa kurapwa kuve nechokwadi chekuti mhinduro yakakwana, iyo crystallization yakakwana uye density yakakwira.
Mukana weiyo reaction-sintered silicon carbide kugadzirwa maitiro ndeyekuti ceramic zvinhu zvine kuomarara kwakanyanya, kusimba kwepamusoro, kukwirira kupfeka kuramba uye kupisa kwakanyanya kugadzikana kunogona kugadzirira. Ichi chinyorwa hachingori neakanakisa mechaniki zvivakwa, asi zvakare ine yakanakisa corrosion kuramba uye yakakwirira tembiricha zvivakwa. Silicon carbide zvinhu zvinogona kushandiswa kugadzira akasiyana einjiniya zvikamu, zvisimbiso zvemakanika, zvishandiso zvekupisa kupisa, cheramics yevira uye zvichingodaro. Panguva imwecheteyo, silicon carbide zvinhu zvinogona zvakare kushandiswa semiconductor, simba rezuva, magineti uye mamwe minda.
Muchidimbu, reaction sintering silicon carbide inzira yakakosha yekugadzirira yakakwira kuita zveceramic zvinhu. Iyo nzira yekugadzira inoda kutonga kwakanaka kwega yega link kuti uwane yakakwirira-mhando yesilicon carbide zvinhu. Reaction-sintered silicon carbide zvinhu zvine yakanakisa mechini zvivakwa, corrosion resistance uye yakakwirira tembiricha zvivakwa, uye zvine tarisiro yakakura yekushandisa munzvimbo dzakasiyana dzemaindasitiri nesainzi.
Nguva yekutumira: Jul-21-2023