Indlela yokubumba yokucindezela okomile
I-alumina ceramicubuchwepheshe bokubumba bokucindezela okomile bukhawulelwe esimweni esimsulwa nokuqina kodonga okungaphezu kuka-1mm, isilinganiso sobude nobubanzi asibi ngaphezu kwemikhiqizo engu-4∶1.Izindlela zokwakha ziyi-uniaxial noma i-biaxial.Umshini wokunyathelisa une-hydraulic, mechanical izinhlobo ezimbili, kungaba ukubumba kwe-semi-automatic noma okuzenzakalelayo.Ukucindezela okukhulu komshini wokunyathelisa kungu-200Mpa, futhi okukhiphayo kungafinyelela izingcezu eziyi-15 ~ 50 ngomzuzu.
Ngenxa yokucindezela okufanayo kwe-stroke ye-hydraulic press, ukuphakama kwezingxenye zokucindezela kuhlukile lapho ukugcwaliswa kwe-powder kuhlukile.Kodwa-ke, ingcindezi esetshenziswa umshini wokunyathelisa ihlukahluka ngenani lokugcwaliswa kwe-powder, okuzoholela kalula kumehluko ekuncipheni kosayizi ngemva kokugcoba futhi kuthinte izinga lemikhiqizo.Ngakho-ke, ukusabalalisa okufanayo kwezinhlayiya ze-powder kwinqubo yokucindezela okomile kubaluleke kakhulu ekugcwaliseni isikhunta.Ukuthi inani lokugcwalisa linembile noma cha linethonya elikhulu ekulawuleni ukunemba kobukhulu bezingxenye ezikhiqiziwe ze-alumina ceramic.Umphumela omkhulu wokugeleza wamahhala ungatholakala lapho izinhlayiya ze-powder zikhulu kuno-60μm naphakathi kuka-60 ~ 200 mesh, futhi umphumela omuhle kakhulu wokwenza ingcindezi ungatholakala.
Indlela yokubumba i-Grouting
Ukubumba i-Grouting kuyindlela yokuqala yokubumba esetshenziswa kuyoi-alumina ceramics.Ngenxa yokusetshenziswa kwesikhunta se-gypsum, izindleko eziphansi futhi kulula ukwenza usayizi omkhulu, izingxenye zomumo oyinkimbinkimbi, isihluthulelo sokubunjwa kwe-grouting ukulungiswa kwe-alumina slurry.Ngokuvamile ngamanzi njenge-flux medium, bese wengeza i-agent encibilikayo yeglue kanye ne-binder, ngokugcwele emva kokugaya i-exhaust, bese uthele isikhunta se-plaster.Ngenxa yokukhangisa kwamanzi nge-capillary yesikhunta se-gypsum, i-slurry iqina ekubunjweni.I-grouting engenalutho, odongeni lwesikhunta i-adsorption slurry ukujiya kuze kufike lapho kudingeka, kodwa futhi kudingeka kuthululwe udaka oludlulele.Ukuze kuncishiswe ukushwabana komzimba, i-slurry ephezulu yokugxila kufanele isetshenziswe ngangokunokwenzeka.
Izithasiselo ze-Organic kufanele zengezwe ku-i-alumina ceramici-slurry ukwenza ungqimba lukagesi oluphindwe kabili ebusweni bezinhlayiya ze-slurry ukuze i-slurry imiswe ngokuqinile ngaphandle kwemvula.Ngaphezu kwalokho, kuyadingeka ukwengeza utshwala be-vinyl, i-methyl cellulose, i-alginate amine nezinye i-binder kanye ne-polypropylene amine, i-Arabic gum kanye nezinye izisabalalisi, inhloso ukwenza i-slurry ifanele ukusebenza kokubunjwa kwe-grouting.
Ubuchwepheshe be-Sintering
Indlela yezobuchwepheshe yokuqinisa umzimba we-ceramic eyimbudumbudu nokwenza izinto eziqinile ibizwa ngokuthi i-sintering.I-Sintering iyindlela yokukhipha isikhala phakathi kwezinhlayiya emzimbeni we-billet, ukususa inani elincane legesi nokungcola okuvela entweni ephilayo, ukuze izinhlayiya zikhule ndawonye futhi zakhe izinto ezintsha.
Ithuluzi lokushisisa elisetshenziselwa ukudubula ngokuvamile liyisithando somlilo sikagesi.Ngaphezu kokucindezela okuvamile, okungukuthi, ngaphandle kokucindezela i-sintering, i-hot sintering kanye nokucindezela okushisayo kwe-isostatic sintering.Ukucindezela okushisayo okuqhubekayo kungakhuphula ukukhiqizwa, kodwa izindleko zemishini kanye nesikhunta ziphezulu kakhulu, ngaphezu kobude bomkhiqizo bunqunyelwe.I-hot isostatic pressure sintering isebenzisa izinga lokushisa eliphezulu kanye negesi yokucindezela okuphezulu njengendlela yokudlulisa ingcindezi, enenzuzo yokushisa okufanayo kuzo zonke izinhlangothi, futhi ifanele ukucwiliswa kwemikhiqizo eyinkimbinkimbi.Ngenxa yesakhiwo esifanayo, izakhiwo zezinto ezibonakalayo zenyuka ngo-30 ~ 50% uma kuqhathaniswa nokucindezela okubandayo kokucindezela.10 ~ 15% ngaphezu kokucindezela okujwayelekile okushisayo.
Isikhathi sokuthumela: May-12-2022