Qhov sib txawv ntawm electron microscopy thiab metallographic microscopy
Cov ntsiab cai ntawm scanning electron microscopy
Scanning Electron Microscope, abbreviated li SEM, yog ib qho kev ua haujlwm nyuaj; Concentrated electronic optical technology, nqus tshuab, zoo mechanical qauv, thiab niaj hnub computer tswj technology. Scanning electron microscopy yog cov txheej txheem ntawm kev sib txuas cov hluav taws xob tso tawm los ntawm rab phom electron nyob rau hauv kev nrawm nrawm rau hauv lub teeb hluav taws xob me me los ntawm ntau theem electromagnetic lens. Luam theej duab saum npoo ntawm tus qauv kom zoo siab rau ntau yam ntaub ntawv, thiab tshuaj xyuas qhov chaw ntawm tus qauv los ntawm kev txais, nthuav tawm, thiab nthuav tawm cov duab ntawm cov ntaub ntawv no. Kev sib cuam tshuam ntawm qhov xwm txheej electron thiab cov qauv ua rau hom ntaub ntawv qhia nyob rau hauv daim duab 1. Qhov ob-dimensional siv tis ntawm cov ntaub ntawv no txawv nrog cov yam ntxwv ntawm tus qauv nto (xws li nto morphology, muaj pes tsawg leeg, siv lead ua orientation, electromagnetic zog, lwm yam). Nws yog cov txheej txheem ntawm kev sib txuas thiab sib luag hloov cov ntaub ntawv sau los ntawm ntau lub tshuab ntes rau hauv cov teeb liab video, thiab tom qab ntawd xa lawv mus rau synchronously scanned duab raj thiab hloov kho lawv qhov ci kom tau txais cov duab scanning uas qhia txog qhov xwm txheej ntawm cov qauv. Yog hais tias lub teeb liab tau txais los ntawm lub ntes yog digitized thiab hloov mus rau hauv lub teeb liab digital, nws tuaj yeem ua tiav ntxiv thiab khaws cia los ntawm lub computer. Scanning electron microscopy feem ntau yog siv los soj ntsuam cov qauv tuab tuab nrog qhov siab loj sib txawv thiab roughness, yog li qhia txog qhov tob ntawm cov nyhuv hauv kev tsim. Nws feem ntau yog siv los txheeb xyuas cov pob txha tawg thiab tej yam ntuj tso uas tsis tau kho.
Electron Microscope thiab Metallographic Microscope
1, Lub teeb pom kev sib txawv: Lub tshuab ntsuas metallographic siv lub teeb pom kev zoo li lub teeb pom kev, thaum lub tshuab ntsuas hluav taws xob siv lub teeb hluav taws xob ua lub teeb pom kev zoo.
2, Lub hauv paus ntsiab lus sib txawv: lub tshuab ntsuas metallographic siv geometric optical imaging cov hauv paus ntsiab lus rau kev kos duab, thaum lub tshuab ntsuas hluav taws xob siv hluav taws xob hluav taws xob siv hluav taws xob hluav taws xob los ua kom tawg rau saum npoo ntawm cov qauv, txhawb nqa ntau yam kev taw qhia ntawm lub cev. Tom qab ntawd, cov teeb liab sib txawv yog siv los txais cov cim ntawm lub cev thiab hloov mus rau hauv cov ntaub ntawv duab.
3, Cov kev daws teeb meem sib txawv: Vim muaj kev cuam tshuam thiab qhov sib txawv ntawm lub teeb, qhov kev daws teeb meem ntawm lub tshuab ntsuas metallographic tsuas tuaj yeem txwv rau 0.2-0.5um. Vim yog siv lub teeb hluav taws xob ua lub teeb ci, scanning electron microscopy tuaj yeem ua tiav qhov kev daws teeb meem ntawm 1-3nm. Yog li, kev soj ntsuam microstructure ntawm metallographic microscopy belongs rau microscale tsom xam, thaum kev soj ntsuam microstructure ntawm scanning electron microscopy belongs rau nanoscale tsom xam.
4, Qhov sib txawv ntawm qhov tob: Feem ntau, qhov tob ntawm thaj tsam ntawm lub tshuab ntsuas metallographic yog nyob nruab nrab ntawm 2-3um, yog li nws muaj qhov xav tau siab heev rau qhov smoothness ntawm tus qauv, yog li nws cov qauv npaj txheej txheem yog qhov nyuaj. Scanning electron microscopy, ntawm qhov tod tes, muaj qhov tob ntawm qhov loj, qhov dav ntawm qhov pom, thiab cov duab peb sab. Nws tuaj yeem saib xyuas cov qauv zoo ntawm ntau yam tsis sib xws ntawm cov qauv.
