Dab tsi yog Crystal Structure ntawm Titanium?
Jan 14, 2024
Taw qhia
Titanium yog cov khoom siv hlau uas siv rau hauv ntau daim ntawv thov vim nws lub zog zoo heev, lub teeb yuag, thiab tiv thaiv corrosion. Cov qauv siv lead ua ntawm titanium yog qhov tseem ceeb hauv kev txiav txim siab nws cov khoom thiab kev ua haujlwm hauv ntau yam kev lag luam thiab kev siv engineering. Hauv tsab xov xwm no, peb yuav tham txog cov qauv siv lead ua ntawm titanium thiab nws cuam tshuam rau nws tus cwj pwm li cas.
Keeb kwm
Titanium yog ib qho kev hloov pauv hlau uas muaj plaub lub valence electrons, thiab nws cov atomic tooj yog 22. Nws muaj ib tug melting point ntawm 1668 degree thiab ib tug boiling point ntawm 3287 degree, ua rau nws ib tug ntawm cov feem ntau ruaj khov thiab robust hlau muaj. Nws tseem yog cov hlau ntau heev, muaj nyob rau hauv ntau yam minerals xws li ilmenite, rutile, thiab titanite.
Cov qauv siv lead ua ntawm titanium yog cov ntaub ntawv tseem ceeb rau cov kws tshawb fawb thiab cov engineers vim nws pab lawv nkag siab tias titanium coj li cas hauv cov xwm txheej sib txawv thiab nws cuam tshuam nrog lwm cov ntaub ntawv.
Crystal qauv ntawm titanium
Cov qauv siv lead ua ntawm titanium yog hexagonal close-packed (HCP) ntawm chav tsev kub thiab hauv qab no. Nws muaj xws li ib tug stacking ntawm cov khaubncaws sab nraud povtseg ntawm kaw-packed atoms nyob rau hauv ib tug hexagonal kev npaj. HCP qauv muaj rau atoms nyob rau hauv chav tsev cell, nrog txhua lub ces kaum atom ncig los ntawm 12 atoms nyob ib sab. Tsis tas li ntawd, txhua ntug atom yog bounded los ntawm rau lub atom nyob sib ze, thiab lub hauv paus atom yog surrounded los ntawm tsawg kawg yog cuaj lwm.
Cov khoom ntawm HCP siv lead ua qauv
HCP siv lead ua qauv ntawm titanium txhim kho nws lub zog, ruaj khov, thiab tsis kam tiv thaiv corrosion. Lub Crystal muaj cov atoms densely, ua rau nws tsis tshua muaj kev cuam tshuam yas deformation thiab deformation tshwm sim los ntawm kev kub siab, kev nyuaj siab, lossis siab. Lub hexagonal kev npaj ntawm atoms kuj ua rau nws tsis tshua muaj kev cuam tshuam rau kev qaug zog tsis ua haujlwm, uas txhim kho nws cov kev ua tau zoo hauv cov ntawv thov kev ntxhov siab.
Cov qauv HCP kuj tseem muaj lub zog qis qis, uas txhais tau hais tias nws tiv taus cov quab yuam shearing. Qhov kev tiv thaiv no tiv thaiv cov khoom los ntawm kev tsis xav tau deformation, uas yog qhov tseem ceeb hauv kev siv uas yuav tsum tau muaj kev ncaj ncees thiab kev ruaj ntseg.
Kev hloov pauv ntawm cov qauv siv lead ua
Txawm hais tias tus qauv HCP yog qhov ruaj khov tshaj plaws ntawm chav tsev kub thiab hauv qab no, titanium tuaj yeem hloov kho dua tshiab raws li qhov sib txawv xws li kub, siab, thiab kev ntxhov siab. Qhov feem ntau restructuring ntawm titanium yog kev hloov mus rau lub cev-centered cubic (BCC) qauv ntawm qhov kub thiab txias, feem ntau nyob ib ncig ntawm 890 degree. BCC qauv muaj yim atoms nyob rau hauv chav tsev cell, nrog ib tug atom ntawm txhua lub ces kaum thiab ib tug nyob rau hauv nruab nrab ntawm lub voos xwmfab. Qhov kev hloov pauv no txhim kho cov qauv ntawm cov hlau, txo nws lub zog, thiab ua rau nws tsis tshua muaj kev cuam tshuam corrosion.
Lwm qhov kev hloov pauv yog qhov hloov pauv mus rau lub ntsej muag-centered cubic (FCC) qauv ntawm qhov kub thiab txias, nyob ib ncig ntawm 1,650 degree. Nyob rau hauv cov qauv FCC, txhua ntug ntawm lub voos xwmfab muaj plaub atoms nyob rau hauv ib tug alternating zam. Qhov kev hloov pauv no tshwm sim thaum titanium yog rhuab nyob rau hauv lub xub ntiag ntawm oxygen thiab nitrogen, thiab nws muaj peev xwm ua rau tsim ib tug nyias oxide txheej rau ntawm qhov chaw.
Kev siv ntawm titanium siv lead ua qauv
Cov qauv siv lead ua ntawm titanium txiav txim siab nws qhov kev ua tau zoo hauv ntau yam kev siv xws li aerospace, kev cog lus kho mob, thiab cov khoom siv ncaws pob. Piv txwv li, HCP siv lead ua qauv ntawm titanium yog qhov tseem ceeb hauv kev siv aerospace raws li nws ua rau cov hlau tiv taus rau kev qaug zog tsis ua hauj lwm, uas yog qhov tseem ceeb hauv qhov chaw muaj kev ntxhov siab xws li cav thiab airframes.
Hauv kev kho mob, lub peev xwm ntawm titanium mus rau kev hloov pauv mus rau BCC qauv nyob rau hauv qhov kub thiab txias yog qhov tseem ceeb hauv kev tsim cov khoom cog. Cov qauv BCC txhim kho cov txheej txheem ntawm cov hlau, ua kom yooj yim rau hauv cov qauv sib txawv yam tsis muaj kev cuam tshuam cov khoom siv kho tshuab. Tsis tas li ntawd, lub biocompatibility ntawm titanium yog txhim kho los ntawm nws cov corrosion kuj, ua rau nws yog ib qho khoom siv tsim nyog rau kev cog qoob loo.
Hauv cov khoom siv ntaus pob ncaws pob, HCP qauv ntawm titanium yog qhov tseem ceeb hauv golf club heads, tsheb kauj vab thav duab, thiab ntaus pob tesniv racquet thav ntawv. Cov qauv siv lead ua muab lub zog zoo dua, kev ruaj khov, thiab kev tiv thaiv kev qaug zog piv rau lwm cov ntaub ntawv, ua rau kev txhim kho kev ua tau zoo thiab kav ntev.
Xaus
Cov qauv siv lead ua ntawm titanium yog qhov tseem ceeb ntawm nws qhov kev ua tau zoo hauv ntau yam kev siv. Cov qauv HCP muab lub zog zoo, ruaj khov, thiab tiv thaiv corrosion, uas ua rau nws zoo tagnrho rau aerospace, kho mob cog, thiab cov cuab yeej ntaus pob ncaws pob. Nkag siab txog kev hloov pauv ntawm titanium cov qauv siv lead ua nyob rau hauv cov xwm txheej sib txawv kuj tseem ceeb rau cov kws tshawb fawb thiab cov kws tsim khoom siv los txhim kho nws cov kev ua tau zoo hauv ntau qhov chaw.