Kuyerekezera katundu wa silicon carbide ceramics ndi alumina ceramics

Sic ceramics samangokhala ndi makina abwino kwambiri otenthetsera kutentha, monga mphamvu yopindika kwambiri, kukana kwa okosijeni bwino, kukana kwa dzimbiri, kukana kuvala kwambiri komanso kugundana kocheperako, komanso amakhala ndi zida zabwino kwambiri zamakina kutentha kwambiri (mphamvu, kukana kukwawa) etc.) pakati pa zida zodziwika bwino za ceramic. Sintering yotentha, yosakanikiza sintering, kutentha kwa isostatic kukanikiza sintering, chodziwika kwambiri cha silicon carbide ndi kutentha kwamphamvu, zinthu za ceramic wamba pa 1200 ~ 1400 digiri Celsius mphamvu zidzachepetsedwa kwambiri, ndipo silicon carbide pa 1400 digiri Celsius mphamvu yopindika. imasungidwabe pamtunda wapamwamba wa 500 ~ 600MPa, kotero kutentha kwa ntchito kumatha kufika madigiri 1600 Celsius; 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%).