Qhov sib txawv tseem ceeb ntawm cov menyuam ntxaib annealing thiab deformation ntxaib yog cov menyuam ntxaib annealing raws li qhov tshwm sim ntawm kev hloov pauv hauv cov siv lead ua thaum lub caij txias, qhov deformation ntxaib tsim los ntawm kev ntxhov siab ntawm cov siv lead ua tom qab cov siv lead ua tau tsim..
Crystal twinning yog kev sib koom ntawm qee qhov tib lub siv lead ua lattice cov ntsiab lus hauv qhov sib luag ntawm ob lub pob zeb sib cais. Cov txheej txheem twinning no ua rau muaj kev sib tshuam ntawm ob lub pob zeb sib cais, tsim ntau yam kev teeb tsa. Peb piav qhia txog qhov muaj pes tsawg leeg ntawm lub dav hlau ntxaib ua qhov ntxaib (qhov twg cov ntsiab lus lattice tau sib koom ntawm ob lub pob zeb sib cais). Raws li crystallographers, cov txheej txheem twining tuaj yeem muab faib ua ob peb pawg nyob ntawm txoj cai ntxaib. Feem ntau, cov kev cai ntxaib yog tshwj xeeb rau cov siv lead ua. Annealing ntxaib thiab deformation ntxaib yog ob hom.
Annealing Twins yog dab tsi?
Annealing ntxaib tseem hu ua kev hloov pauv cov menyuam ntxaib thiab yog qhov tshwm sim los ntawm kev hloov pauv hauv cov siv lead ua thaum lub caij txias. Thaum lub sij hawm txias, ib daim ntawv siv lead ua tsis ruaj khov, thiab cov qauv siv lead ua zoo li rov ua dua lossis hloov mus rau lwm daim ntawv ruaj khov. Yog li ntawd, cov menyuam ntxaib annealing tsim raws li qhov tshwm sim ntawm kev loj hlob kev raug mob thaum lub sij hawm recrystallization ntawm hlau (tshwj xeeb yog cov deformed cubic-ze packed hlau), xws li alpha tooj dag, tooj liab, npib tsib xee, thiab austenitic hlau.
Raws li keeb kwm, peb tuaj yeem pom qhov sib tw ntxaib kub thaum ntxov li xyoo 1897. Tab sis qhov no yog qhov tshwm sim tsis tshua muaj, thiab muaj ntau cov pov thawj pom tau tias muaj qee yam tseem ceeb uas txiav txim siab qhov zaus uas hom no. ntawm kub tshwm sim. Qee yam ntawm cov xwm txheej no suav nrog cov nplej loj, qhov kub thiab lub sijhawm ntawm kev sib tsoo, cov ciam teb nrawm nrawm, crystallographic kev ntxhib los mos, muaj kev suav nrog, thiab lwm yam.
Dab tsi yog Deformation Twins?
Cov menyuam ntxaib Deformation yog cov duab puab lossis cov menyuam ntxaib. Cov menyuam ntxaib no tuaj yeem nthuav tawm los ntawm kev siv lub zog ntawm tus ntxaib ntxaib los yog kev txav ntawm tus ntxaib ciam rau hauv cov khoom siv tsis muaj qhov sib tw uas muaj ib qho ncaj nraim. Peb tuaj yeem paub qhov txawv ntawm cov menyuam ntxaib no yooj yim los ntawm lwm hom menyuam ntxaib los ntawm lawv cov duab.
Daim duab 01: Twinned Crystals of Albite
Deformation twinning tshwm sim los ntawm ib cheeb tsam metamorphism. Peb tuaj yeem pom hom kev sib tw no raws li cov qauv tsis xws luag hauv feem ntau lub ntsej muag-centred cubic hlau uas muaj lub zog qis qis. Ntxiv mus, cov zaub mov tuaj yeem deform los ntawm deformation twinning los yog nplaim-zoo li lwm yam tsis yog ib qho dislocation. Muaj peb kauj ruam tseem ceeb ntawm kev tsim cov ntxaib deformation: nucleation, propagation, thiab kev loj hlob theem.
Qhov txawv ntawm Annealing ntxaib thiab Deformation ntxaib yog dab tsi?
Raws li cov kws tshaj lij crystallographers, cov txheej txheem twining tuaj yeem muab faib ua ob peb pawg nyob ntawm txoj cai ntxaib. Annealing ntxaib thiab deformation ntxaib yog ob hom. Qhov sib txawv tseem ceeb ntawm cov menyuam ntxaib annealing thiab deformation ntxaib yog tias cov menyuam ntxaib annealing vim qhov kev hloov pauv hauv cov siv lead ua thaum lub caij txias, thaum cov menyuam ntxaib deformation vim qhov kev ntxhov siab ntawm cov siv lead ua tom qab cov siv lead ua tau tsim.
Cov infographic hauv qab no qhia qhov sib txawv ntawm qhov sib txawv ntawm cov menyuam ntxaib thiab cov menyuam ntxaib deformation nyob rau hauv daim ntawv tabular rau ib sab ntawm kev sib piv
Summary – Annealing Twins vs Deformation Twins
Crystal twinning yog hais txog kev sib koom ntawm qee cov ntsiab lus siv lead ua lattice nyob rau hauv ib qho kev sib luag ntawm ob lub pob zeb sib cais. Raws li crystallographers, cov txheej txheem twining tuaj yeem muab faib ua ob peb pawg nyob ntawm txoj cai ntxaib. Annealing ntxaib thiab deformation ntxaib yog ob hom. Qhov sib txawv tseem ceeb ntawm cov menyuam ntxaib annealing thiab deformation ntxaib yog tias cov menyuam ntxaib annealing vim qhov kev hloov pauv hauv cov siv lead ua thaum lub caij txias, thaum cov menyuam ntxaib deformation vim qhov kev ntxhov siab ntawm cov siv lead ua tom qab cov siv lead ua tau tsim.
