Kuongorora Kwakadzama kwePolycrystalline Diamond: Zvimiro, Kugadzirwa, uye Mashandisirwo

Dhaimani yePolycrystalline (PCD) chinhu chinoshamisa chinosanganisa kuomarara kunoshamisa uye kuramba kupfeka kwedhaimani yekristaro imwe chete pamwe chete nemabhenefiti ekuwedzera anisotropy uye kuramba kukanganiswa, zvakafanana nezvinhu zvecarbide. Hunhu uhwu hunoita kuti PCD ive yakakodzera kushandiswa kwakasiyana-siyana, kusanganisira kubvisa mafuta negasi, kutsvaga marasha negeology, uye kugadzirisa michina.

Kwakatangira Dhaimondi yePolycrystalline

Dhaimani yePolycrystalline inowanzo enzaniswa nedhaimani yemhando ye single-crystal, iyo inozivikanwa nehunhu hwayo hunoshamisa. Muzvisikwa, imwe mhando yedhaimani isingawanzo kuwanikwa, inozivikanwa se kabhonidhadhikana kuti dhaimani nhema, yakawanikwa. Kusiyana nedhaimani rekristaro imwe chete, carbonado ipurasitiki yakagadzirwa nemakristaro madiki akawanda edhaimani, akasanganiswa netsvina shoma. Chimiro ichi chakasiyana, chisina kupatsanurwa, chinoita kuti pave nekuomarara kwakanyanya, simba, uye kusakara, zvichitopfuura madhaimani ekare ekristaro imwe chete.

Nzira dzekugadzira Polycrystalline Diamond

Kugadzirwa kwedhaimani repolycrystalline kunoda matekiniki akasiyana-siyana epamusoro, rimwe nerimwe richipa zvakanakira nematambudziko zvichienderana nekushandiswa kwaro.

1. Kugadzirwa Kwezvinhu Zvinoputika:
   Munzira iyi, midziyo inodzivirira kumanikidzwa kwakanyanya inoshandiswa kushandisa kupisa kwakanyanya uye simba rekufamba rinogadzirwa nekuputika. Simba rinobuda rinorova simbi pamapepa egirafiti, zvichiita kuti girafiti iite dhaimani repolycrystalline rinopisa nekukurumidza. Kunyange zvazvo nzira iyi ichikurumidza uye isingadhuri, inoguma nemapolycrystals madiki uye asina kurongeka, zvichideredza kushandiswa kwayo kuPCD ine giredhi remhando yepamusoro apo kunyatsoita zvinhu hakusi iko kunonyanya kukosha.
2. Kubviswa kweUtsi hweMakemikari Hune Simba Rishoma (CVD):
   Maitiro eCVD ane pressure yakaderera anounza magasi ane kabhoni mukamuri re reaction pasi pemhepo iri pasi pe1 yepressure. Kuburikidza nemaitiro akasiyana-siyana emakemikari, maatomu ekabhoni anobva muzvinhu zvegasi anoiswa pamusoro pe substrate muchimiro chemafirimu e polycrystalline diamond. Nzira iyi inogadzira mafirimu akasimba ane hunhu hwakanaka hwekupisa uye mukana wekubatanidza zvinhu zvinoshandisa doping mukushandiswa kwakakosha mumagetsi ne optics. Zvisinei, CVD inotambura nenguva refu yekugadzira uye kugadzirwa kushoma, izvo zvinopa matambudziko ekugadzira zvinhu zvikuru.
3. Kushandurwa Kwakananga:
   Nzira iyi yepamusoro inosanganisira kushandura upfu hwegrafiti hwakachena zvakanyanya kuita dhaimani repolycrystalline nekuisa pasi pekumanikidzwa kwakanyanya (kupfuura 2000°C uye 13 GPa). Madhaimani anobuda ane hunhu hwekushanda hwakafanana nehwedhaimani dzechisikigo. Zvisinei, zvinodiwa nesimba rakawanda uye mamiriro akaomarara zvinoita kuti maitiro aya ave anodhura uye asashande zvakanaka mumaindasitiri, zvichiita kuti ashandiswe mukuyedza panguva ino.
4. Nzira yekunyungudutsa ine kumanikidzwa kwakanyanya (HPHT):
   Munzira iyi yekugadzira, polycrystalline diamond composites inogadzirwa pasi pekumanikidzwa kwakanyanya (5–7 GPa) uye tembiricha (1300–1700°C) uchishandisa graphite powder, diamond micro-powder, uye transition metals kana alloy catalysts. Nzira iyi inopa kukurumidza kugadzira synthesis cycle uye zvinodiwa zvemidziyo zvishoma zvichienzaniswa nedzimwe nzira, zvichiita kuti ive yakakodzera kugadzirwa kwemaindasitiri nemutengo wakaderera.

Hunhu uye Mashandisirwo ePolycrystalline Diamond

Dhaimani yePolycrystalline inoonekwa zvakanyanya nekuda kwemaumbirwo ayo akasiyana. Kurongeka kwemakristaro edhaimani imwe neimwe kunogadzira chinhu chinoenderana zvakanyanya nehunhu hwayo hwemuviri uye hwemakemikari, ichiratidza kugara kwenguva refu uye kushanda zvakanaka kumativi ese. Kusavapo kwenzvimbo dzakatsemuka kunoita kuti dhaimani yepolycrystalline isanyanya kusimba, zvichiita kuti dhaimani yepolycrystalline itsungirire kuvhunduka kupfuura madhaimani makuru e-single-crystal. Izvi zvinoita kuti ive sarudzo yakanaka yekushandisa dhaimani ine simba guru iyo inowanzo pwanyika kana kukuvadza dhaimani imwe chete.

Nekuda kwemutengo wayo wakaderera wekugadzira kana tichienzanisa nemadhaimani makuru ane kristalo rimwe chete, dhaimani repolycrystalline rinogona kugadzirwa mumhando dzakasiyana-siyana kuti rienderane nezvinodiwa nemaindasitiri. Rinoramba rakaomesesa uye rine simba, zvichiita kuti rive chinhu chinokosha pakushandiswa kwakasiyana-siyana, kusanganisira:

• Zvishandiso zveKuchera neKucheka zveMaindasitiri:Dhaimani yePolycrystalline inoshandiswa zvakanyanya mukugadzira maturusi ekucheka nekuboora ane simba repamusoro, kunyanya pazvinhu zvakasimba zvakaita sematombo, kongiri, nesimbi dzakaoma.
• Kutsvaga Oiri neGasi:Kusapfeka kwayo kana kukuvadzwa kunoita kuti PCD ive chinhu chakanaka kwazvo chekushandisa pakuchera nekuburitsa maturusi muindasitiri yemafuta negesi.
• Migodhi neMamiriro eNyika:PCD inoshandiswa zvakanyanya mumichina yekuchera matombo akaomarara uye kuongorora geology nekuda kwekusimba kwayo uye kugara kwenguva refu.
• Kugadzira Nemazvo:Mukugadzirisa nekugadzira michina, dhaimani repolycrystalline rinoshandiswa muzvinhu zvinokwesha kuti riwane mhedzisiro chaiyo.

Mhedziso

Dhaimani yePolycrystalline yave chinhu chakakosha mumaindasitiri akasiyana-siyana, nekuda kwekuoma kwayo, kusimba, uye kushanduka-shanduka. Kukwanisa kugadzira PCD uchishandisa nzira dzakasiyana, dzakadai sekugadzira zvinoputika, kuisa makemikari mumhepo, uye matekiniki ekupisa kwakanyanya, zvinoita kuti irambe ichikosha mukugadzira maturusi nemichina yepamusoro. Nekusanganiswa kwayo kwekusimba kweindasitiri uye kugadzira kwayo kusingadhuri, dhaimani yepolycrystalline icharamba ichiita basa guru mune matekinoroji echinyakare neechizvino-zvino.