Zofunika Kwambiri

Kodi zinthu zolimba kwambiri ndi chiyani?

Chida cholimba kwambiri ndi chinthu chokhala ndi kuuma kwamtengo wopitilira 40 gigapascals (GPa) poyesedwa ndi mayeso a kuuma kwa Vickers. Iwo ali pafupifupi incompressible zolimba ndi mkulu ma elekitironi kachulukidwe ndi mkulu chomangira covalency. Chifukwa cha katundu wawo wapadera, zipangizozi zimakhala ndi chidwi chachikulu m'madera ambiri ogulitsa mafakitale kuphatikizapo, koma osati, abrasives, kupukuta ndi kudula zida, mabuleki a disk, ndi zokutira zosavala komanso zoteteza.

Njira yopezera zida zatsopano zolimba kwambiri

Mu njira yoyamba, ochita kafukufuku amatsanzira njira zazifupi, zowongolera za carbon covalent za diamondi pophatikiza zinthu zowala monga boron, carbon, nitrogen, and oxygen.

Njira yachiwiri imaphatikizapo zinthu zopepuka izi (B, C, N, ndi O), komanso imayambitsa zitsulo zosinthika ndi ma electron apamwamba a valence kuti apereke incompressibility yapamwamba. Mwanjira iyi, zitsulo zokhala ndi moduli yochuluka koma zolimba zochepa zimagwirizanitsidwa ndi maatomu ang'onoang'ono opangira covalent kuti apange zipangizo zolimba kwambiri. Tungsten carbide ndi chiwonetsero chogwira ntchito m'mafakitale cha njirayi, ngakhale sichiwerengedwa kuti ndi yovuta kwambiri. Kapenanso, ma boride ophatikizidwa ndi zitsulo zosinthika akhala malo olemera a kafukufuku wovuta kwambiri ndipo apangitsa kuti atulutsidwe monga.ReB2,OsB2,ndiWB4.

Gulu la zinthu zolimba kwambiri

Zipangizo zolimba kwambiri zimatha kugawidwa m'magulu awiri: zophatikiza zamkati ndi zowonjezera. Gulu lamkati limaphatikizapo diamondi, cubic boron nitride (c-BN), carbon nitrides, ndi mankhwala a ternary monga B-N-C, omwe ali ndi kuuma kwachibadwa. Mosiyana ndi izi, zida zakunja ndizomwe zimakhala zolimba kwambiri komanso zida zina zamakina zomwe zimatsimikiziridwa ndi microstructure yawo m'malo mopanga. Chitsanzo cha extrinsic superhard material ndi diamondi ya nanocrystalline yotchedwa aggregated diamond nanorods.

Daimondi ndiye chinthu chovuta kwambiri chodziwika mpaka pano, chokhala ndi kuuma kwa Vickers mumitundu ya 70-150 GPa. Daimondi imasonyeza kutenthedwa kwapamwamba komanso kutetezedwa kwa magetsi, ndipo chidwi chachikulu chayikidwa pakupeza ntchito zothandiza za nkhaniyi. Katundu wa diamondi wamba kapena carbonado amasiyana mosiyanasiyana pazolinga zamafakitale, chifukwa chake diamondi zopangira zidakhala gawo lalikulu pakufufuza.

Daimondi yopangira

Kuphatikizika kwamphamvu kwa diamondi mu 1953 ku Sweden komanso mu 1954 ku US kunatheka chifukwa chopanga zida ndi njira zatsopano, kudakhala gawo lofunika kwambiri pakuphatikiza zida zolimba kwambiri. Kuphatikizikako kunawonetsa momveka bwino kuthekera kwa ntchito zopanikizika kwambiri pazolinga zamafakitale ndikupangitsa chidwi chokulirapo m'munda.

PDC cutter ndi mtundu wazinthu zolimba kwambiri zomwe zimaphatikiza diamondi ya polycrystalline ndi tungsten carbide gawo lapansi. Daimondi ndiye chinthu chofunikira kwambiri kwa ocheka a PDC. Chifukwa ma diamondi achilengedwe ndi ovuta kupanga ndipo amatenga nthawi yayitali, ndi okwera mtengo kwambiri, komanso okwera mtengo kwambiri pogwiritsira ntchito mafakitale, pamenepa, Synthetic diamondi yakhala ndi gawo lalikulu pamakampani.

Ngati muli ndi chidwi ndi zinthu za tungsten carbide ndipo mukufuna zambiri ndi zambiri, mutha KULUMIKIZANA NAFE pa lamya kapena makalata kumanzere, kapena KUTITUMIZIRA MAIL pansi pa tsambali.