Dab tsi yog titanium alloy khoom siv feem ntau siv hauv orthopedics?

Ntawm ntau cov khoom siv kho mob sab hauv hauv orthopedics, daim hlau ua los ntawm titanium tau dhau los ua ntau dua. Tsis tsuas yog nws txawv ntawm cov khoom siv kho mob sab hauv ua los ntawm cov hlau tsis muaj steel nyob rau hauv cov nqe lus ntawm seb puas muaj MRI tuaj yeem ua tiav tom qab phais, tab sis nws kuj nthuav tawm cov khoom sib txawv hauv lwm txoj kev.
Titanium alloys muaj qhov zoo ntawm kev ruaj ntseg tshuaj, siab biocompatibility, siab zog thiab lub teeb yuag, uas yog vim li cas lawv tau dav siv los ua tus qauv rau kev tsim cov khoom cog hauv tib neeg lub cev. Txog cov khoom thiab cov yam ntxwv ntawm cov khoom siv no, cia peb ua tib zoo saib hauv qab no.

Dab tsi yog titanium alloy
Titanium alloy yog cov hlau uas muaj kev sib xyaw ntawm titanium thiab lwm yam tshuaj lom neeg. Cov alloys no muaj zog tensile siab heev thiab toughness (txawm thaum huab cua kub). Lawv yog cov hnyav thiab muaj qhov tshwj xeeb tiv thaiv corrosion thiab muaj peev xwm tiv taus qhov kub thiab txias. Titanium lub siab affinity rau oxygen atoms txhais tau hais tias ib tug nyias txheej ntawm ntom oxide (TiO2) tuaj yeem tsim nyob rau saum npoo ntawm titanium alloys txawm nyob rau hauv chav tsev kub cua, uas suav rau qhov zoo heev corrosion kuj ntawm titanium alloys.
Classification ntawm titanium alloys
Titanium muaj nyob rau hauv ob daim ntawv crystalline. Nyob rau hauv chav tsev kub, unalloyed (kev lag luam ntshiab) titanium muaj ib tug densely teem hexagonal qauv (hcp) hu ua alpha theem. Thaum cov ntshiab titanium nce mus txog qhov kub ntawm 885 degree (lub npe hu ua beta transverse kub ntawm titanium), cov qauv siv lead ua hloov mus rau hauv cubic qauv (bcc), hu ua beta theem. Cov khoom ntawm titanium alloys yog nyob ntawm qhov kev teeb tsa thiab theem, lawv qhov ntim feem ntau thiab lawv cov khoom sib luag.