Silicon nitride (Si3N4) yog cov khoom siv ceramic uas nthuav tawm cov khoom siv zoo heev, feem ntau dhau ntawm lwm cov ntaub ntawv ceramic. Thaum piv rau lwm cov ceramics, silicon nitride muaj kev sib xyaw ua ke ntawm lub zog, tawv, thiab kev ntseeg siab, ua rau nws xaiv rau ntau daim ntawv thov.
Siab zog
Ib qho tseem ceeb cov cuab yeej cuab tam ntawm silicon nitride yog nws lub zog. Si3N4 muaj lub zog tensile siab thiab compressive zog, ua rau nws muaj peev xwm tiv taus cov khoom tseem ceeb. Nws lub zog yog piv los yog txawm zoo dua rau lwm cov ceramics xws li alumina thiab zirconia. Cov yam ntxwv no ua rau Si3N4 siv rau hauv cov ntawv thov uas xav tau cov ntaub ntawv muaj zog.
Exceptional Hardness
Tsis tas li ntawd, silicon nitride nthuav tawm cov hardness zoo heev, uas yog ib qho kev ntsuas ntawm nws cov kev tiv thaiv rau qhov chaw indentation los yog khawb. Nws hardness yog piv rau lwm cov ntaub ntawv ceramic, xws li alumina thiab zirconia. Lub siab hardness ntawm Si3N4 pab txhawb rau nws hnav tsis kam thiab muaj peev xwm tswj tau nws qhov kev ncaj ncees saum npoo nyob rau hauv abrasive tej yam kev mob.
Tsawg Friction Coefficient
Ntxiv mus, silicon nitride muaj cov coefficient tsawg ntawm kev sib txhuam, uas txo qhov yuav ntawm cov khoom hnav thiab txhim kho nws cov khoom tribological. Cov cuab yeej no muaj txiaj ntsig tshwj xeeb hauv cov ntawv thov uas zawv zawg lossis rub cov kev sib cuag tshwm sim, xws li hauv cov bearings lossis cov cuab yeej txiav.
High Thermal conductivity
Nyob rau hauv cov nqe lus ntawm thermal zog, silicon nitride muaj ib tug kuj tsis tshua muaj thermal conductivity piv rau hlau tab sis siab tshaj ntau lwm yam ceramics. Cov cuab yeej no ua rau nws tsim nyog rau cov ntawv thov uas xav tau thermal rwb thaiv tsev lossis thaum xav tau los tswj cov cua sov kom zoo.
Superior Thermal Shock Resistance
Thaum piv rau lwm cov ceramics, xws li alumina thiab zirconia, silicon nitride kuj qhia tau zoo heev tiv thaiv thermal shock. Thermal shock yog hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv qhov kub thiab txias hloov pauv yam tsis tau tawg. Si3N4 tsis tshua muaj thermal expansion coefficient thiab siab thermal stability ua kom nws tiv thaiv thermal shock zoo dua li ntau lwm yam khoom siv ceramic.
Corrosion Resistance
Tsis tas li ntawd, silicon nitride nthuav tawm cov tshuaj lom neeg ruaj khov thiab tiv taus ntau yam corrosive, acids, thiab alkalis. Cov cuab yeej no tso cai rau nws tswj hwm nws cov neeg kho tshuab kev ncaj ncees thiab kev ua haujlwm nyob rau hauv ib puag ncig hnyav hnyav, uas yog qhov tseem ceeb rau ntau yam kev lag luam.
Cov khoom siv zoo tshaj plaws no ua rau silicon nitride yog qhov kev xaiv zoo tshaj plaws rau ntau yam kev siv, suav nrog cov khoom siv tsheb, cov cuab yeej txiav, bearings, thiab ntau yam kev ua haujlwm siab engineering. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov khoom siv hluav taws xob ntawm cov ceramics, suav nrog Si3N4, tuaj yeem sib txawv nyob ntawm seb muaj pes tsawg leeg, kev ua haujlwm, thiab microstructure. Cov txheej txheem kev tsim khoom sib txawv, xws li kub nias lossis sintering, tuaj yeem cuam tshuam rau qhov kawg ntawm cov khoom siv.
