Ukuqhathaniswa kwezakhiwo ze-silicon carbide ceramics kanye ne-alumina ceramics

I-Sic ceramics ayinazo nje kuphela izakhiwo ezinhle kakhulu zemishini ekushiseni kwegumbi, njengamandla aphezulu okugoba, ukumelana okuhle kakhulu kwe-oxidation, ukumelana okuhle kokugqwala, ukumelana okuphezulu kokuguguleka kanye ne-coefficient ephansi yokungqubuzana, kodwa futhi inezakhiwo ezinhle kakhulu zemishini ekushiseni okuphezulu (amandla, ukumelana nokuqhekeka, njll.) phakathi kwezinto ze-ceramic ezaziwayo. Ukucindezela okushisa, ukusha okungacindezeli, izinto zokucindezela ezishisayo ze-isostatic, isici esikhulu se-silicon carbide amandla aphezulu okushisa, izinto ze-ceramic ezijwayelekile ku-1200 ~ 1400 degrees Celsius amandla azoncishiswa kakhulu, kanti i-silicon carbide ku-1400 degrees Celsius amandla okugoba isagcinwa ezingeni eliphakeme lama-500 ~ 600MPa, ngakho izinga lokushisa lokusebenza lingafinyelela ku-1600 degrees Celsius; Ukuthungwa kwepuleti le-Silicon carbide kuqinile futhi kuyaphuka, i-coefficient yokwandisa incane, ukumelana nokubanda nokushisa, akulula ukuyiguqula. I-Silicon carbide incane kakhulu, ngakho izingxenye ze-ceramic ezenziwe nge-silicon carbide zilula kakhulu.

I-Alumina ceramic uhlobo lwe-alumina (Al2O3) njengomzimba oyinhloko wezinto ze-ceramic, ezisetshenziswa kumasekethe ahlanganisiwe efilimu ebanzi. I-Alumina ceramics inomoya omuhle wokuqhuba, amandla omshini kanye nokumelana nokushisa okuphezulu. Kufanele kuqashelwe ukuthi kudingeka ukuwasha nge-ultrasonic. Ukumelana kwayo nokuguguleka kuphindwe izikhathi ezingu-266 kunensimbi ye-manganese kanye ne-chromium cast iron ephindwe izikhathi ezingu-171.5 kunensimbi ephezulu. I-Alumina ceramic uhlobo lwezinto zokuvikela ezisezingeni eliphezulu, ezivame ukusetshenziselwa ukwenza ishidi lokuvikela i-ceramic, indandatho yokuvikela kanye nezinye izingxenye. I-Alumina ceramics ingamelana nokushisa okuphezulu kuze kufike ku-1750℃ (okuqukethwe kwe-alumina okungaphezu kuka-99%).