Engineering Ceramics – Tus yuam sij rau Advanced Industrial Solutions

Engineering ceramics nyuaj, cov ntaub ntawv nonmetallic tsim los tiv taus qhov kub thiab txias, los ntawm cov vuas luaj ceramic siv rau ntawm qhov chaw shuttles mus rau cov hniav nyiaj hniav kub. Engineering ceramics muaj ntau daim ntawv thov los ntawm aerospace mus rau kev kho hniav.

Advanced technical ceramics muaj cov ntshiab oxides, carbides thiab nitrides xws li alumina (Al2O3), silicon carbide, SiC thiab zirconia, ua rau lawv nyuaj rau tshuab yam tsis muaj kev paub tshwj xeeb thiab khoom siv los ntawm cov kws tshaj lij ceramic engineering.

Alumina

Alumina (aluminium oxide, Al2O3) yog ib qho ntawm feem ntau siv engineering ceramics. Nws yog adaptable heev, nyuaj, thiab cov khoom siv insulating ua rau nws tsim nyog rau kev ua haujlwm hnyav uas yuav cuam tshuam ntau dua sophisticated ceramics, thiab feem ntau koj yuav pom nws hauv cov khoom siv dawb lossis cov khoom siv thev naus laus zis zoo li lub tshuab hluav taws xob lossis cov khoom siv hluav taws xob..

Thaum ua haujlwm nrog alumina ceramics, lawv tag nrho microstructure yog txiav txim los ntawm raw cov ntaub ntawv siv, kev tsim cov txheej txheem ua haujlwm thiab kev tsim cov txheej txheem siv. Qhov no thaum kawg cuam tshuam nws cov durability thiab qhov tseeb qhov tseeb.

Thaum qhov kev xav tau thiab qhov loj me tau txais, alumina tuaj yeem densified siv sintering. Qhov no suav nrog muab cov khoom ntxhib tuav ua ke nrog cov kua nplaum rau hauv qhov cub uas atomic thiab molecular diffusion txo qhov porosity, tsim cov khoom denser nrog ntxiv zog thiab tawg toughness.

Cov kws ua haujlwm feem ntau suav nrog lwm cov khoom xyaw rau hauv alumina-based ceramics nyob ntawm daim ntawv thov. Feem ntau additives suav nrog:

Silicon

Silicon nitride ceramics muaj cov thermal expansion thiab tsis kam rau thermal shock, nrog zoo heev hluav taws xob rwb thaiv tsev zog thiab xoom corrosion thiab oxidation teeb meem. Vim cov cwj pwm no, silicon nitride ceramics ua rau cov khoom lag luam zoo heev; tshwj xeeb lawv muaj peev xwm tiv taus qhov kub thiab txias ua rau lawv haum rau combustion nozzles thiab nplaim taws, dav hlau thiab refractory raj hauv flue gas desulphurisation nroj tsuag, ceramic bearings / tuag rau hlau ua haujlwm nrog rau qhov chaw sib cuag uas yuav tsum tiv thaiv kev sib txhuam tsis tu ncua tiv thaiv cov tawv abrasive uas pom ntws ntawm qhov chaw siab tshaj / siab – tag nrho cov cim ntawm kev siv cov khoom zoo!

Engineering ceramics’ Cov khoom tshwj xeeb tau ua rau muaj kev tsim ntau yam khoom siv tshiab tshiab siv hauv kev tiv thaiv hauv tebchaws, aerospace, automotive thiab machinery industries – tig lub ntiaj teb no ceramic lag luam rau hauv ib $60 billion lag luam!

Cov khoom siv ceramic yog txiav txim siab los ntawm nws cov chemistry thiab microstructure. Lawv qhov kev ua tau zoo tuaj yeem hloov pauv los ntawm kev sib txawv ntawm kev ua haujlwm lossis ntxiv cov ntsiab lus rau nws cov qauv ceramic, nrog nws cov khoom hloov kho los ntawm kev siv cov txheej txheem sib txawv lossis ntxiv cov ntsiab lus rau nws cov qauv ceramic. Nano nplai ceramic hais kuj cuam tshuam rau kev coj tus cwj pwm ntawm cov tshuaj lom neeg muaj pes tsawg leeg thiab reactivity nrog rau cov khoom siv kho tshuab xws li tawg toughness – Raws li Faber-Evans qauv kwv yees tias ceramic toughening nce nrog tawg deflection los yog bowing ntawm theem ob hais nyob rau hauv lawv cov matrix thiab tis ntawm particle morphology., nam piv los yog interparticle sib nrug – ua rau lawv cov khoom toughening uas ua rau muaj txiaj ntsig zoo rau kev tawg deflection lossis bowing, tawg deflection / bowing tau txhim kho ntxiv los ntawm kev faib khoom ntawm particle morphology / nam piv / interparticle qhov sib txawv. Toughening kuj nce los ntawm kev siv ntau yam kev ua haujlwm uas ntxiv cov ntsiab lus rau nws cov txheej txheem ceramic / qauv / sau ua ke.

Boron

Raws li ib tug tub ntxhais kawm engineering ceramic, koj yuav tau txais kev paub ua haujlwm nrog ntau yam ntaub ntawv thiab txheej txheem. Pib hauv koj lub xyoo thib ob, koj yuav kawm plaub chav kuaj tub ntxhais kawm, koom nrog hauv txoj kev tshawb fawb kawm tiav undergraduate, nkag mus rau Mines’ nyob rau hauv tsev kawm ntawv iav kub lub khw rau kev tsim khoom thiab ua haujlwm ze nrog cov kws qhia ntawv kws pab tswv yim los tsim cov khoom siv tshiab thiab txhim kho ceramics rau koj qhov kev kawm qib siab.

Engineering ceramics tau dhau los ua kev txhim kho sai tshaj li kaum xyoo dhau los, yielding ib tug loj xaiv ntawm ntau yam ntaub ntawv uas muaj peev xwm tiv taus ib tug array ntawm kub thiab ib puag ncig. Lawv cov khoom nyob ntawm ob qho tib si lawv muaj pes tsawg leeg, microstructure thiab siv tej yam kev mob – ua txhua yam ceramic sib txawv nyob ntawm seb nws muaj pes tsawg leeg, microstructure los yog siv tej yam kev mob.

Cov txheej txheem sintering uas tsim cov khoom siv ceramic ua lub luag haujlwm tseem ceeb hauv kev tsim lawv cov yam ntxwv kawg ntawm lub cev. Cov qoob loo loj hlob ua lub luag haujlwm tseem ceeb, cuam ​​tshuam rau nws cov qauv kawg thiab kev ua haujlwm ntawm kev siv tshuab; ib qho tsis xwm yeem lis qhov loj me tuaj yeem hloov pauv ntau yam ntawm cov qauv thiab cov khoom siv ntawm cov khoom siv ceramic kawg.

Boron carbide yog ib qho khoom siv tsis tseem ceeb rau kev siv cov ceramics xws li cov cuab yeej txiav, tuag thiab pob zeb xyaum, thib ob tsuas yog pob zeb diamond nyob rau hauv cov nqe lus ntawm hardness. Boroni carbide kuj tseem muaj cov thermal conductivity zoo heev thiab hluav taws xob rwb thaiv tsev cov khoom uas ua rau nws cov khoom zoo tagnrho rau cov khoom siv hluav taws xob muaj zog thiab hnav cov coatings resistant rau cov khoom siv mining thiab cov khoom siv ntxhia..

Boride

Boron tuaj yeem txhim kho qhov kub-kub stability ntawm hlau oxides. Tsis tas li ntawd, cov khoom no ua hauj lwm pab raws li ib tug reinforcing ceramic theem nyob rau hauv hlau matrix composites; tshwj xeeb ceramics ua los ntawm boron carbide (BCN), Hafnium-tantalum carbidide (HfTaC), los yog zirconia siv raws li hnav tiv thaiv daim ntaub ntawv.

Ceramics uas muaj boron tej zaum yuav tsis yooj yim, Txawm li cas los xij, lawv cov pob txha tawg siab dua tso cai rau lawv kom nqus tau lub zog ntau dua yam tsis muaj kev tawg. Tsis tas li ntawd, cov ntaub ntawv no muaj cov tshuaj tiv thaiv zoo heev thiab kev ua haujlwm puas ua rau lawv hloov cov hlau tawv hauv ntau daim ntawv thov.

Vim lawv cov ionic lossis covalent bonding zog, feem ntau ceramics tsis pom cov yas deformation ntawm chav tsev kub thiab yog li muaj tsawg dua ductility dua hlau. Txawm li cas los xij, ceramics tseem tuaj yeem pom cov yas tseem ceeb ntawm qhov kub siab dua qhov twg cov txheej txheem tawg txawv txawv ntawm cov hlau..

Boron-raws li ceramics ua ke tsis tshua muaj lub ntiajteb txawj nqus nrog lub zog txhua yam kom ua rau lawv txaus nyiam siv ntau yam kev siv.. Lawv hnav-tiv taus tso cai rau lawv los hloov cov hlau tawv hauv xov xwm thauj mus los ntawm qhov nrawm nrawm, siab los yog cavitation tus nqi; txhim kho cov mining thiab ntxhia ua cov cuab yeej ua haujlwm zoo thiab ua haujlwm ntev nrog rau cov plua plav sau cov tshuab rau kev rho tawm, sib tsoo, conveying thiab plua plav sau tshuab. Tsis tas li ntawd, cov ntaub ntawv no tuaj yeem ua kom muaj kev ntseeg siab hauv cov roj & gas thiab tshuaj industries los ntawm cov qauv rotating qhov chaw ua nrog cov ceramics.