Si3N4-SiC cib

Cov khoom no tau tshwm sim thawj zaug thaum xyoo 1960s, thiab nws cov yam ntxwv yog tias nws siv Si3N4 los ua ib daim ntawv khi. Si3N4 muaj nyob nruab nrab ntawm SiC nplej nyob rau hauv daim ntawv ntawm koob-zoo li tus los yog fibrous muaju, thiab yog ib qho tseem ceeb tshiab hom refractory khoom. Nws feem ntau muaj 70% mus rau 75% silicon carbide thiab 18% mus rau 25% silicon nitride. Nws muaj qhov zoo corrosion kuj, 1400 ℃ flexural zog ntawm 50 mus rau 55MPa, thiab pom porosity ntawm 15%. Thermal expansion coefficient (4.5 txog 5.0) × 10-2 ℃ -1. Nws yog npaj los ntawm kub sintering txoj kev. Nws yog tsuas yog siv rau blast furnace tuyere thiab aluminium electrolytic cell hauv ob sab phlu. Nyob rau hauv xyoo tsis ntev los no, peb lub tuam txhab tau siv silicon nitride bonded silicon carbide cib rau industrial silicon ore rauv lub qhov ncauj thiab silicon dej hnab, uas zoo heev txhim kho lub cub tawg lub neej thiab kev pab cuam lub neej ntawm silicon dej hnab.