Kev Saib Xyuas Qhov tob ntawm Polycrystalline Pob Zeb Diamond: Cov Khoom, Kev Sib Xyaws, thiab Daim Ntawv Thov

Pob zeb diamond polycrystalline (PCD) yog ib yam khoom zoo kawg nkaus uas muab qhov nyuaj thiab kev tiv taus hnav ntawm pob zeb diamond ib leeg nrog rau qhov zoo ntxiv ntawm kev tiv taus anisotropy thiab kev cuam tshuam, zoo ib yam li cov khoom carbide. Cov yam ntxwv no ua rau PCD tsim nyog heev rau ntau yam kev siv, suav nrog kev rho tawm roj thiab roj av, kev tshawb nrhiav thee thiab geological, thiab kev ua cov khoom siv kho tshuab.

Lub hauv paus chiv keeb ntawm Polycrystalline Pob Zeb Diamond

Pob zeb diamond polycrystalline feem ntau piv rau pob zeb diamond ib leeg uas muaj cov khoom siv lead ua ke, uas tau lees paub rau nws cov khoom tshwj xeeb. Hauv xwm, lwm yam pob zeb diamond tsis tshua muaj, hu ua carbonadolos yog pob zeb diamond dub, tau raug tshawb pom. Tsis zoo li cov pob zeb diamond ib leeg, carbonado yog cov khoom siv polycrystalline uas muaj ntau cov pob zeb diamond me me, sib xyaw nrog cov khoom tsis huv. Cov qauv tshwj xeeb no, nrog nws tsis muaj cov dav hlau sib cais, ua rau muaj qhov nyuaj, lub zog, thiab kev tiv thaiv kev hnav, txawm tias tshaj qhov ntawm cov pob zeb diamond ib leeg.

Cov Txheej Txheem Synthesis ntawm Polycrystalline Pob Zeb Diamond

Kev tsim cov pob zeb diamond polycrystalline xav tau ntau yam txheej txheem siab heev, txhua tus muab cov txiaj ntsig thiab cov teeb meem tshwj xeeb nyob ntawm daim ntawv thov.

1. Kev Sib Xyaws Ua Los Ntawm Cov Khoom Siv Tawg:
   Hauv txoj kev no, cov thawv uas tiv taus siab siv los siv lub zog kub thiab lub zog kinetic uas tsim los ntawm kev tawg. Lub zog ua rau cov ntawv hlau cuam tshuam rau ntawm cov ntawv graphite, tsim kom muaj qhov kub thiab txias sai thiab siab uas hloov graphite mus ua cov pob zeb diamond polycrystalline me me. Txawm hais tias txoj kev no ua haujlwm sai thiab pheej yig, nws ua rau cov polycrystalline me me thiab tsis sib xws, txwv tsis pub siv rau PCD qib abrasive qhov twg qhov tseeb tsis yog qhov txhawj xeeb tseem ceeb.
2. Kev Tso Pa Tshuaj Uas Muaj Peev Xwm Tsawg (CVD):
   Cov txheej txheem CVD uas muaj qhov siab qis ua rau cov pa roj carbon uas muaj nyob rau hauv chav tshuaj tiv thaiv nyob rau hauv qhov xwm txheej uas tsawg dua 1 huab cua ntawm qhov siab. Los ntawm ntau yam kev tshuaj tiv thaiv tshuaj, cov pa roj carbon atoms los ntawm cov khoom siv roj tau tso rau ntawm qhov chaw ntawm lub substrate hauv daim ntawv ntawm cov yeeb yaj kiab pob zeb diamond polycrystalline. Txoj kev no tsim cov yeeb yaj kiab ruaj khov heev nrog cov khoom siv thermal zoo heev thiab muaj peev xwm los koom ua ke cov ntsiab lus doping rau cov ntawv thov tshwj xeeb hauv cov khoom siv hluav taws xob thiab optics. Txawm li cas los xij, CVD raug kev txom nyem los ntawm lub sijhawm ntev synthesis thiab kev tsim khoom qis, uas ua rau muaj kev cov nyom rau kev tsim khoom loj.
3. Kev Hloov Pauv Ncaj Qha:
   Txoj kev ua haujlwm siab heev no suav nrog kev hloov cov hmoov graphite micro-hmoov uas muaj cov khoom huv si mus ua cov pob zeb diamond polycrystalline los ntawm kev muab nws tso rau hauv qhov kub siab heev (ntau tshaj 2000 ° C thiab 13 GPa). Cov pob zeb diamond uas tau los muaj cov yam ntxwv ua tau zoo ze li ntawm cov pob zeb diamond ntuj. Txawm li cas los xij, qhov xav tau lub zog siab thiab cov xwm txheej nruj ua rau cov txheej txheem no kim thiab tsis ua haujlwm zoo rau kev siv hauv kev lag luam, ua rau nws nyob rau hauv qhov chaw sim tam sim no.
4. Txoj Kev Siv Tshuaj Solvent Uas Siv Kub Siab (HPHT):
   Hauv cov txheej txheem tsim cov khoom no, cov khoom sib xyaw ua los ntawm pob zeb diamond polycrystalline raug tsim nyob rau hauv kev tswj hwm siab (5–7 GPa) thiab kub (1300–1700 ° C) siv cov hmoov graphite, cov hmoov pob zeb diamond micro-hmoov, thiab cov hlau hloov pauv lossis cov catalysts alloy. Txoj kev no muab lub voj voog tsim khoom sai dua thiab cov khoom siv qis dua piv rau lwm txoj kev, ua rau nws zoo rau kev tsim khoom lag luam ntawm tus nqi qis dua.

Cov yam ntxwv thiab daim ntawv thov ntawm Polycrystalline Pob Zeb Diamond

Pob zeb diamond polycrystalline sawv tawm vim nws cov qauv tshwj xeeb. Kev teeb tsa random ntawm cov pob zeb diamond crystals ib leeg tsim cov khoom siv uas muaj kev sib xws heev hauv nws cov khoom siv lub cev thiab tshuaj lom neeg, qhia txog kev ruaj khov zoo heev thiab kev ua tau zoo hauv txhua qhov kev taw qhia. Qhov tsis muaj cov dav hlau cleavage muab kev tiv thaiv kev cuam tshuam zoo dua, ua rau pob zeb diamond polycrystalline muaj zog dua rau kev poob siab dua li cov pob zeb diamond loj ib leeg. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov cuam tshuam siab uas feem ntau yuav tawg lossis ua puas rau cov pob zeb ib leeg.

Vim nws tus nqi tsim khoom qis dua piv rau cov pob zeb diamond loj uas muaj ib lub pob zeb siv lead ua ke, cov pob zeb diamond polycrystalline tuaj yeem tsim tau ntau yam duab kom haum rau cov kev xav tau tshwj xeeb hauv kev lag luam. Nws khaws cov tawv thiab lub zog tshwj xeeb, ua rau nws yog cov khoom siv tseem ceeb rau ntau yam kev siv, suav nrog:

• Cov Cuab Yeej Siv Rau Kev Tshawb Fawb Thiab Txiav:Pob zeb diamond polycrystalline yog siv dav hauv kev tsim cov cuab yeej txiav thiab khawb ua haujlwm siab, tshwj xeeb tshaj yog rau cov ntaub ntawv tawv xws li pob zeb, pob zeb ua vaj tse, thiab cov hlau tawv.
• Kev Tshawb Fawb Roj thiab Roj Av:Nws txoj kev tiv taus kev hnav thiab kev cuam tshuam ua rau PCD yog cov khoom siv zoo heev rau kev khawb thiab rho tawm cov cuab yeej hauv kev lag luam roj thiab roj av.
• Kev Tshawb Fawb Txog Av thiab Kev Tshawb Fawb Txog Av:PCD siv dav hauv cov khoom siv mining rau kev khawb los ntawm cov pob zeb tawv thiab kev tshawb nrhiav geological vim nws lub zog thiab kev ua haujlwm ntev.
• Kev Tsim Khoom Zoo:Hauv kev ua khoom siv thiab kev tsim khoom, polycrystalline pob zeb diamond yog siv rau hauv cov ntaub ntawv abrasive kom ua tiav cov txiaj ntsig siab.

Xaus lus

Pob zeb diamond polycrystalline tau dhau los ua cov khoom siv tseem ceeb hauv ntau yam lag luam, ua tsaug rau nws qhov nyuaj, lub zog, thiab kev hloov pauv tau yooj yim. Lub peev xwm los tsim PCD siv ntau txoj kev sib txawv, xws li kev tsim cov khoom tawg, kev tso pa tshuaj lom neeg, thiab cov txheej txheem kub siab, ua kom nws tseem ceeb hauv kev tsim cov cuab yeej thiab tshuab siab heev. Nrog nws txoj kev sib xyaw ua ke ntawm kev ruaj khov hauv kev lag luam thiab kev tsim khoom pheej yig, pob zeb diamond polycrystalline yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv ob qho tib si cov thev naus laus zis ib txwm muaj thiab cov thev naus laus zis tshiab.