hlau ntshiab homogeneous los yog heterogeneous?

Cov lus nug ntawm seb cov hlau ntshiab yog homogeneous lossis heterogeneous nyob ntawm cov ntsiab lus tshwj xeeb thiab cov nplai hauv kev sib tham.
Los ntawm kev xav ntawm cov tshuaj muaj pes tsawg leeg, cov hlau ntshiab yog hais txog hlau tsis muaj impurities, uas muaj cov tshuaj lom neeg tsis sib xws thiab feem ntau yog tsim los ntawm cov hlau. Yog li ntawd, nyob rau theem no, cov hlau ntshiab tuaj yeem suav tias yog cov khoom siv homogeneous.
Txawm li cas los xij, ntawm qhov ntsuas microscopic ntau dua, cov khoom siv lub cev ntawm cov hlau ntshiab, xws li cov nplej loj, kev taw qhia ntawm cov nplej, microstructure, thiab lwm yam, tuaj yeem pom qee yam tsis sib xws. Piv txwv li, cov nplej hauv cov hlau ntshiab yuav muaj cov duab sib txawv, qhov ntau thiab tsawg, thiab kev taw qhia, uas tuaj yeem ua rau qee yam heterogeneity nyob rau hauv txhua yam, electromagnetic, los yog thermal zog ntawm cov khoom. Tsis tas li ntawd, cov hlau ntshiab kuj tseem tuaj yeem nthuav tawm cov txheej txheem microstructural heterogeneity thaum lub sij hawm ua, kev kho cua sov, los yog siv los ntawm tej yam xws li kev nyuaj siab, strain, los yog theem transformation.
Tsis tas li ntawd, nws tsim nyog sau cia tias txawm tias cov hlau ntshiab uas muaj cov tshuaj lom neeg muaj pes tsawg leeg tuaj yeem pom cov lus teb sib txawv thaum raug rau lwm yam xws li kub, siab, electromagnetic teb, thiab lwm yam. Piv txwv li, raws li kev soj ntsuam ntawm cov thev naus laus zis xws li scanning electrochemical microscopy (SECM. ), nws tau pom tias cov zaj duab xis passive tsim los ntawm cov hlau ntshiab electrodes tej zaum yuav tsis sib xws hauv cov tuab thiab muaj pes tsawg leeg.