Cobalt chromium alloy yog thawj zaug siv los ua cov khoom cog. Tom qab ntawd, txhawm rau daws qhov teeb meem kev tsis haum ntawm cov npib tsib xee uas muaj hlau, Tebchaws Europe thiab Amelikas tau tsim cobalt chromium alloy tshwj xeeb uas siv los kho cov plooj (porcelain). Nws yuav tsis ua rau cov hlau tsis muaj xim nyob rau hauv lub qhov ncauj ntawm cov neeg mob. Cobalt chromium alloy yog thawj zaug siv hauv kev hloov tshuaj thiab siv rau kev sib koom ua ke, uas kuj yog ib qho cim ntawm nws cov biocompatibility thiab tau siv los txog rau tam sim no.
Thaum ntxov li xyoo 1929, nws tau siv hauv kev kho hniav thiab tau pib siv los kho cov hniav uas tshem tau ib nrab. Cobalt chromium alloy: nws yog tsim los rau toxicity ntawm Ni thiab beryllium. Nws cov ntsiab lus cobalt yog siab dua li cov nickel raws li alloy, feem ntau 25 feem pua. Kuj tseem muaj cov khoom xws li Cu, W, Nb, Si, Ru, Al thiab mo. Vim nws cov ntsiab lus cobalt siab, nws cov corrosion kuj zoo dua li cov nickel raws li alloy, thiab cov hlau porcelain daim ntawv cog lus zoo. Vim tias nws muaj ntau cov chromium, nws cov ntsiab lus melting yog siab, thiab muaj qee yam tshuaj tiv thaiv ntawm cov hlau thiab cov khoom embedded.
Cov cobalt chromium alloy siv rau cov hniav plooj (porcelain hniav) muaj qhov elastic modulus ntawm 213745mpa thiab hardness ntawm 335 Vickers. Ntau dua elastic coefficient, siab kev nplij siab, tsis muaj alloy discoloration nyob rau hauv tus neeg mob lub qhov ncauj. Qhov sib txawv ntawm cobalt chromium alloy siv rau porcelain fused rau hlau hniav thiab cobalt chromium alloy siv rau cov hniav nyiaj hniav kub ib nrab yog qhov sib txawv ntawm cov ntsiab lus ntawm cov hlau. Feem ntau, cov qub muaj me me los yog tsis muaj carbon.
