I-Magnesia-stabilized zirconia (MSZ) ikwazi ukumelana nokuguguleka nokushaqeka kokushisa. Ukwehla kwesigaba esincane se-tetragonal kukhula ngaphakathi kwezinhlamvu zesigaba se-cubic ze-zirconias eziqinile njenge-magnesium-stabilized zirconia. Uma i-fracture izama ukuhamba ngempahla, lezi zimvula ziyashintsha ukusuka kusigaba se-meta-stable tetragonal kuya esigabeni esizinzile se-monoclinic. Ngenxa yalokho, imvula iyakhula, ifiphaze indawo yokuphuka futhi ikhulise ukuqina. Ngenxa yokuhlukahluka kokuthi impahla eluhlaza yalungiswa kanjani, i-MSZ ingaba yindlovu noma umbala ophuzi-owolintshi. I-MSZ, enombala wezinyo lendlovu, ihlanzekile futhi inezimfanelo zomshini ezingcono kakhulu. Emazingeni okushisa aphezulu (220°C nangaphezulu) kanye nezilungiselelo zomswakama ophezulu, i-MSZ izinzile kune-YTZP, futhi i-YTZP ivamise ukwehlisela izinga. Ngaphandle kwalokho, i-MSZ ine-thermal conductivity ephansi kanye ne-CTE efana ne-cast iron, evimbela ukungafani kokushisa ezinhlelweni ze-ceramic-to-metal.
Izakhiwo
Amandla aphezulu emishini
Ukuqina kwe-fracture ephezulu
Ukumelana nokushisa okuphezulu
Ukumelana nokugqoka okuphezulu
Ukumelana nomthelela ophezulu
Ukumelana nokushaqeka okuhle kokushisa
I-thermal conductivity ephansi kakhulu
Ukunwetshwa kwe-thermal kulungele ukuhlangana kwe-ceramic-to-metal
Ukumelana namakhemikhali aphezulu (ama-asidi nezisekelo)
Izinhlelo zokusebenza
I-zirconia ene-Magnesia-stabilized ingasetshenziswa kuma-valve, amaphampu, nama-gaskets ngoba inokuguga okuhle kakhulu nokumelana nokugqwala. Kuphinde kube yinto ekhethwayo yemikhakha ye-petrochemical kanye ne-chemical processing. I-Zirconia ceramics iyindlela enhle emikhakheni eminingi, kufaka phakathi:
I-ceramics yesakhiwo
Amabhere
Gqoka izingxenye
Gqoka imikhono
Futha imilomo
Imikhono yepompo
Fafaza ama-pistons
Amabhusha
Izingxenye ze-solid oxide fuel cell
Amathuluzi e-MWD
Imihlahlandlela ye-roller yokwenza amashubhu
Izingxenye ezijulile, ze-downhole
IMagnesia-Stabilized Zirconia Machining
Ezifundeni zayo eziluhlaza, amabhisikidi, noma eziminyene ngokuphelele, i-MSZ ingenziwa ngomshini. Uma ikuhlobo oluluhlaza noma lwebhisikidi, ingase ifakwe kumajiyometri ayinkimbinkimbi kalula nje. Umzimba we-zirconia uyancipha cishe ngo-20% ngesikhathi senqubo ye-sintering, okudingekayo ukuze ugxilise ngokwanele impahla. Ngenxa yalokhu kuncipha, i-zirconia pre-sintering ayikwazi ukwenziwa ngomshini ngokubekezelela okuhle kakhulu. Izinto ezifakwe i-sintered ngokugcwele kufanele zenziwe ngomshini noma zicijwe ngamathuluzi edayimane ukuze kutholwe ukubekezelelana okuqinile. Kule nqubo yokukhiqiza, okokusebenza kugaywa ngokusebenzisa ithuluzi elihle kakhulu elinamekwe ngedayimane noma isondo kuze kube yilapho kutholakala ifomu elidingekayo. Lokhu kungaba inqubo edla isikhathi futhi ebizayo ngenxa yokuqina nokuqina kwempahla.
