Tus nqi ntawm Green Silicon Carbide Micropowder hauv Precision Instrument Manufacturing
Thaum taug kev mus rau hauv cov chaw ua haujlwm ntsuas cov cuab yeej siv, qhov chaw uas ib tug neeg tuaj yeem hnov lub plawv dhia, huab cua puv nrog cov ntxhiab tsw ntawm cov dej txias. Tus Xib Hwb Li, ntsia ntsoov, tshuaj xyuas lub pob ntsuas tungsten carbide tshiab nrog lub iav tsom iav, hais tias, "Niaj hnub no, txoj haujlwm no tau dhau los ua qhov nyuaj dua. Ib qho yuam kev, txawm tias yog kaum feem pua ntawm cov plaub hau dav, tuaj yeem rhuav tshem tag nrho cov cuab yeej!" Tseeb tiag, lub plawv ntawm cov cuab yeej siv - cov iav pom kev, cov kabmob ceramic, thiab cov carbide probes - txhua tus yog qhov kev sib tw loj heev: cov av nplaum, tawg yooj yim, thiab tseem muaj qhov ntev me me. Lub caij no, ib qho micropowder ntsuab ci ntsa iab ua lub luag haujlwm ntawm "tus phab ej tom qab qhov xwm txheej" - ntsuab silicon carbide micropowder, qhov tseem ceeb "micrometer-level scalpel" hauv kev tsim khoom siv.
Cov silicon carbide ntsuab (SiC) tsis yog tsuas yog xuab zeb xwb. Ib qho khoom muaj nqis uas tau ua los ntawm cov khoom siv raw xws li xuab zeb quartz thiab roj av coke hauv lub cub tawg uas tiv taus, nws muaj lub zog ruaj khov (Mohs hardness ntawm 9.5, thib ob tsuas yog pob zeb diamond thiab cubic boron nitride). Qhov tseem ceeb tshaj plaws yog nws cov npoo ntse zoo li riam thiab cov khoom siv tshuaj ruaj khov heev, uas ua rau nws tiv taus qhov kub siab thiab tiv taus kev cuam tshuam nrog cov ntaub ntawv uas tab tom ua. Tom qab kev sib tsoo thiab kev ntsuas kom zoo, cov hmoov ntsuab ci ntsa iab no, me me li ob peb microns lossis txawm tias feem pua ntawm ib micron, zoo li "lub tuam txhab hniav ntse me me" uas tau tsim tshwj xeeb los daws cov ntaub ntawv nyuaj heev, tawg yooj yim nrog kev ua haujlwm raug.
Kev daws qhov nyuaj: Tus "nemesis" ntawm carbide thiab ceramics
Cov cuab yeej txiav carbide, cov rooj zaum ceramic bearing, thiab cov nplhaib silicon carbide sealing yog qhov muaj nyob rau hauv cov cuab yeej precision. Cov ntaub ntawv no nyuaj heev uas cov khoom siv abrasives ib txwm nyuaj rau nkag mus rau hauv lawv, ua rau muaj kev ua haujlwm tsawg thiab yooj yim chipping thiab tawg. Kev tuaj txog ntawm cov hmoov silicon carbide ntsuab tam sim ntawd hloov pauv qhov chaw. "Kuv siv los sib tsoo cov carbide probe tips nrog kev ceev faj heev, zoo li paj ntaub, thiab cov npoo feem ntau chipped," Xiao Wang, uas ua haujlwm lub tshuab sib tsoo nto precision hais. "Txij li thaum siv cov kua sib tsoo uas tsim los ntawm cov hmoov silicon carbide ntsuab, kuv tau ntseeg siab dua! Qhov nrawm pub mov sai dua, lub zog sib tsoo zoo li 'crissy' ntau dua, thiab qhov tseem ceeb, qhov kev ncaj ncees ntawm ntug zoo dua, nrog rau chipping tsawg dua." Qhov zais cia tom qab qhov no yog nyob rau hauv qhov nyuaj heev thiab cov npoo ntse ntawm cov hmoov silicon carbide ntsuab, uas "txiav" huv si los ntawm cov khoom es tsis txhob sib tsoo nrog lub zog brute. Qhov no txo kev puas tsuaj rau cov khoom ua haujlwm tawg yooj yim thiab ua rau muaj kev ua haujlwm zoo dua.
Txiav Lub "Lub Plawv Iav": Cov Kws Tshaj Lij Txhuam Hniav ntawm Optical thiab Semiconductor Devices
Lub qhov muag ntawm cov cuab yeej siv precision—optical lenses thiab prisms, nrog rau semiconductor wafers thiab MEMS sensor chips—xav tau cov nto du zoo li daim tawv nqaij menyuam yaus (roughness Ra feem ntau mus txog qib nanometer), tsis muaj chaw rau khawb lossis puas tsuaj rau hauv qab. Green silicon carbide micropowder hloov mus ua tus tswv polishing zoo heev. Thaum lub sijhawm lapping thiab polishing, green silicon carbide micropowder nrog cov khoom me me (W-qib lossis txawm tias finer) yog siv thiab dai rau hauv cov kua polishing tshwj xeeb. "Rau quartz crystal oscillators lossis precision optical surfaces, kev dai ntawm cov hmoov silicon carbide ntsuab ua haujlwm zoo dua li qee cov khoom kim dua," tus kws ua haujlwm qub uas muaj nees nkaum xyoo ntawm kev paub hauv lub rooj cob qhia optical hais. "Nws muab lub zog sib tsoo ruaj khov, thiab cov khoom sib xws tsis tshua muaj peev xwm sib sau ua ke thiab khawb qhov chaw. Qhov chaw polished tsis ci ntsa iab, thiab cov txheej txheem puas tsuaj hauv qab yog ntiav, uas yog qhov tseem ceeb rau kev xa hluav taws xob thiab kev ruaj khov mus sij hawm ntev ntawm cov khoom siv optical!" Qhov tsis muaj tshuaj lom neeg ntawm ntsuab silicon carbide kuj ua kom ntseeg tau tias cov txheej txheem polishing tsis qhia txog cov khoom tsis huv thiab kev ua qias tuaj, ua kom ntseeg tau tias qhov huv ntawm cov khoom kawg.
Kev Ua Duab Kom Tseeb: Lub "Riam Txiav" rau Cov Khoom Siv Me Me Uas Muaj Ntau Yam
Cov cuab yeej siv precision muaj ntau yam khoom me me uas zoo li txawv txawv: cov khoom siv ceramic insulators uas tsis zoo li qub, cov grooves hauv microfluidic chips, thiab cov iav me me ua los ntawm cemented carbide. Cov chaw no raug kaw thiab nyuaj, ua rau cov cuab yeej ib txwm tsis yooj yim mus txog. Cov hmoov silicon carbide ntsuab, ua ke nrog cov thev naus laus zis precision machining, dhau los ua ib qho cuab yeej muaj zog rau "micro-carving." Piv txwv li, ntxiv cov hmoov silicon carbide ntsuab zoo rau hauv cov kua sib tsoo rau kev sib tsoo jig precision lossis kev txiav hlau tuaj yeem txhim kho kev sib tsoo zoo thiab kev raug ntawm cov khoom siv superhard. "Kev ua kom cov qhov me me uas nyias li cov plaub hau hauv lub carbide nozzle yog txhua yam hais txog kev sib tsoo nws me ntsis nrog cov tshuaj sib tsoo uas muaj cov hmoov silicon carbide ntsuab, ua ke nrog lub taub hau sib tsoo pob zeb diamond nyias li koob," Zhao hais, uas saib xyuas kev saib xyuas pwm precision. "Nws tsim cov phab ntsa qhov ncaj thiab du, nrog kev tswj hwm qhov ntev sib xws hauv micrometers. Kev siv lwm cov hmoov tsis tsim cov txiaj ntsig zoo li no." Hauv kev siv ultrasonic-assisted machining, cov hmoov silicon carbide ntsuab yog tus khub zoo heev rau kev co siab zaus, ua rau muaj kev ua haujlwm zoo precision drilling, txiav, thiab kev ua cov khoom siv tawv thiab brittle.
Siv Qhov Zoo Tshaj Plaws ntawm "Micron Riam" No: Kev Paub Los Ntawm Lub Rooj Sib Tham
Raws li cov cuab yeej precision txuas ntxiv mus ua me dua, ntse dua, thiab ua tiav qhov kev ua tau zoo dua, qhov kev xav tau ntawm kev tsim khoom precision rau cov khoom tseem ceeb yuav tsuas yog ua kom nruj dua. Cov thev naus laus zis hmoov silicon carbide ntsuab kuj tseem txhim kho tas li. Micropowders nrog cov khoom me me faib me me, cov khoom me me (nanoscale), thiab cov morphologies tswj tau ntau dua (xws li ib feem sphericity kom txo qhov khawb) yog cov chaw tshawb fawb kub thiab kev txhim kho. Cov engineers kuj tseem niaj hnub siv zog los koom ua ke zoo dua cov hmoov silicon carbide ntsuab rau hauv cov chav ua haujlwm tsis siv neeg thiab ntse (xws li cov chaw nres tsheb polishing robotic thiab cov txheej txheem sib tsoo hloov kho nrog kev saib xyuas online) kom ua tiav kev tsim khoom precision ruaj khov thiab ua haujlwm tau zoo. Hauv cov chaw ua haujlwm precision ntawm yav tom ntej, qhov "micrometer-level scalpel" no yuav tsis muaj qhov tsis ntseeg tias yuav ntse dua thiab ntse dua.