Ibikoresho bya superhard

Nibihe bintu bikomeye cyane?

Ibikoresho bya superhard ni ibikoresho bifite agaciro karenze gigapasikali 40 (GPa) iyo bipimwe nikizamini cya Vickers. Nibisanzwe bidashobora gukomera hamwe nubucucike bukabije bwa electron hamwe nuburinganire bwinshi. Bitewe nimiterere yihariye yabo, ibyo bikoresho birashimishije cyane mubice byinshi byinganda zirimo, ariko ntibigarukira gusa, abrasives, ibikoresho byo gusya no gukata, feri ya disiki, hamwe nudukingirizo twirinda kandi twirinda.

Inzira yo kubona ibikoresho bishya bya superhard

Muburyo bwa mbere, abashakashatsi bigana imigozi migufi ya covalent ya karubone ya diyama bahuza ibintu byoroheje nka boron, karubone, azote, na ogisijeni.

Uburyo bwa kabiri bukubiyemo ibintu byoroheje (B, C, N, na O), ariko kandi bizana ibyuma byinzibacyuho bifite ubucucike bwa elegitoronike ya elegitoronike kugirango bitange ibintu bidashoboka. Muri ubu buryo, ibyuma bifite moduli nyinshi ariko ubukana buke buhuzwa na atome ntoya ikora covalent kugirango ikore ibikoresho bya superhard. Tungsten karbide nigikorwa kijyanye ninganda kigaragaza ubu buryo, nubwo bidafatwa nkibikomeye. Ubundi, boride ihujwe nicyuma cyinzibacyuho yahindutse agace gakungahaye kubushakashatsi bwa superhard kandi biganisha kubuvumbuzi nkaReB2,OsB2, naWB4.

Gutondekanya ibikoresho bya superhard

Ibikoresho bya superhard birashobora gushyirwa mubyiciro bibiri: ibice byimbere hamwe nibindi biva hanze. Itsinda ryimbere ririmo diyama, cubic boron nitride (c-BN), nitride ya karubone, hamwe na ternary compound nka B-N-C, ifite ubukana kavukire. Ibinyuranye, ibikoresho byo hanze nibyo bifite ubukana buhebuje nibindi bikoresho bya mashini bigenwa na microstructure aho kuba ibihimbano. Urugero rwibikoresho bya superhard ni diyama ya nanocrystalline izwi nka diyama yegeranijwe.

Diamond nicyo kintu kizwi cyane kugeza ubu, hamwe na Vickers ubukana buri hagati ya 70-150 GPa. Diamond yerekana amashanyarazi menshi hamwe nubushakashatsi bwamashanyarazi, kandi hitabiriwe cyane mugushakisha ibikoresho bifatika. Imiterere ya diyama isanzwe cyangwa karubone iratandukanye cyane mubikorwa byinganda, nuko diyama yubukorikori yabaye intumbero yibanze mubushakashatsi.

Diyama

Synthesis yumuvuduko mwinshi wa diyama mu 1953 muri Suwede no muri 1954 muri Amerika byashobotse mugutezimbere ibikoresho nubuhanga bushya, byabaye intambwe yibanze muguhuza ibikoresho bya superhard artificiel. Synthesis yerekanaga neza ubushobozi bwumuvuduko ukabije wibikorwa byinganda kandi byashishikarije kwiyongera murwego.

PDC ikata ni ubwoko bwibintu bikomeye cyane bigereranya diyama polycrystalline hamwe na karubide ya tungsten. Diamond nigikoresho cyingenzi cyibikoresho bya PDC. Kubera ko diyama karemano itoroshye kuyikora no gufata igihe kirekire, irazimvye cyane, kandi ihenze mugukoresha inganda, muriki gihe, diyama ya sintetike yagize uruhare runini muruganda.

Niba ushimishijwe nibicuruzwa bya tungsten ukaba ushaka amakuru arambuye, urashobora kutwandikira ukoresheje terefone cyangwa amabaruwa ibumoso, cyangwa UKOHEREZA MAIL US hepfo yurupapuro.