Kuyerekezera katundu wa silicon carbide ceramics ndi alumina ceramics

Sic ceramics sangokhala ndi makina abwino kwambiri pa kutentha kwa chipinda, monga mphamvu yopindika kwambiri, kukana kwa okosijeni bwino, kukana kwa dzimbiri, kukana kuvala kwapamwamba komanso kutsika kwapakati, komanso kumakhala ndi makina abwino kwambiri pa kutentha kwakukulu (mphamvu, kukana kukwawa, etc.) pakati pa zipangizo zodziwika bwino za ceramic. Hot kukanikiza sintering, sanali kukanikiza sintering, otentha isostatic kukanikiza sintering zipangizo, khalidwe lalikulu la pakachitsulo carbide ndi mkulu kutentha mphamvu, wamba ceramic zinthu pa 1200 ~ 1400 madigiri Celsius mphamvu adzakhala kwambiri yafupika, ndi silicon carbide pa 1400 digiri Celsius kupinda mphamvu akadali anakhalabe pa mlingo wapamwamba wa 500MP mpaka 60 mpaka 100 ° C kutentha kutentha; Silicon carbide mbale kapangidwe molimba ndi Chimaona, kukulitsa koyenera ndi yaying'ono, kuzizira ndi kutentha kukana, si kophweka mapindikidwe. Silicon carbide ndiyocheperako kwambiri, kotero mbali za ceramic zopangidwa ndi silicon carbide ndizopepuka kwambiri.

Alumina ceramic ndi mtundu wa alumina (Al2O3) monga thupi lalikulu la zinthu zadothi, zomwe zimagwiritsidwa ntchito mumayendedwe ophatikizika amakanema. Alumina ceramics ali ndi ma conductivity abwino, mphamvu zamakina komanso kukana kutentha kwambiri. Tikumbukenso kuti akupanga kutsuka chofunika. Kukana kwake kuvala ndi nthawi 266 kuposa chitsulo cha manganese ndi nthawi 171.5 kuposa chitsulo chapamwamba cha chromium. Alumina ceramic ndi mtundu wapamwamba kwambiri wotchingira zinthu, womwe nthawi zambiri umagwiritsidwa ntchito popanga mapepala otchingira a ceramic, mphete yotchingira ndi mbali zina. Zoumba za aluminiyamu zimatha kupirira kutentha kwambiri mpaka 1750 ℃ ​​(zopangidwa ndi aluminiyamu kuposa 99%).