Ipuleti le-sinter ithuluzi elisetshenziselwa ukuthwala nokuthutha umbungu oshisiwe we-ceramic kuhnu ye-ceramic.Isetshenziswa kakhulu kuhhavini ye-ceramic njengesithwali sokuthwala, ukufakwa kokushisa nokudlulisa izitsha zobumba ezishisiwe.Ngayo, ingakwazi ukuthuthukisa isivinini sokushisa kokushisa kwepuleti ye-sintering, yenze imikhiqizo ye-sintering ishise ngokulinganayo, inciphise ngempumelelo ukusetshenziswa kwamandla futhi isheshise isivinini sokudubula, ithuthukise okukhiphayo, ukuze imikhiqizo efanayo yokushisa ihhavini iqhume umehluko ongenambala nezinye izinzuzo.
I-Corundum mullite impahla inokumelana nokushaqeka okuphezulu okushisayo namandla okushisa aphezulu, nokuzinza okuhle kwamakhemikhali nokumelana nokugqoka.Ngakho-ke, ingasetshenziswa ngokuphindaphindiwe emazingeni okushisa aphakeme, ikakhulukazi ama-sintered magnetic cores, ama-ceramic capacitors kanye ne-ceramics yokuvikela.
Imikhiqizo ye-Sintering yimikhiqizo ye-laminated sintering.Ungqimba ngalunye lwepuleti le-sintering kanye nesisindo somkhiqizo cishe ngu-1kg, ngokuvamile ungqimba lwe-l0, ngakho-ke ipuleti le-sintering lingase lithwale ukucindezela okukhulu kwamakhilogremu ayishumi.Ngesikhathi esifanayo, ukuthwala i-thrust lapho uhamba kanye nokungqubuzana kokulayisha nokuthulula imikhiqizo, kodwa futhi nemijikelezo eminingi ebandayo neyokushisa, ngakho-ke, ukusetshenziswa kwemvelo kunzima kakhulu.
Ngaphandle kokucabangela ukusebenzisana kwezici ezintathu, i-alumina powder, i-kaolin kanye nezinga lokushisa lokubala konke kuthinta ukumelana nokushaqeka okushisayo kanye nokukhasa.Ukumelana nokushaqeka okushisayo kuyanda ngokungezwa kwe-alumina powder, futhi kuncipha ngokunyuka kwezinga lokushisa lokudubula.Uma okuqukethwe kwe-kaolin kungu-8%, ukumelana nokushaqeka okushisayo kuba phansi kakhulu, kulandelwa okuqukethwe kwe-kaolin okungu-9.5%.I-creep iyancipha ngokufakwa kwe-alumina powder, futhi i-creep iyona ephansi kakhulu lapho okuqukethwe kwe-kaolin kungu-8%.Ukuphakama okuphezulu ku-1580 ℃.Ukuze ucabangele ukumelana nokushaqeka okushisayo kanye nokumelana nokukhasa kwezinto, imiphumela engcono kakhulu itholakala lapho okuqukethwe kwe-alumina kungu-26%, i-kaolin ingu-6.5% kanye nezinga lokushisa lokubala lingu-1580 ℃.
Kukhona igebe elithile phakathi kwezinhlayiya ze-corundum-mullite kanye ne-matrix.Futhi kukhona imifantu ezungeze izinhlayiya, okubangelwa ukungafani kwe-coefficient yokwandisa okushisayo kanye ne-elastic modulus phakathi kwezinhlayiya ne-matrix, okuholela kuma-microcracks emikhiqizweni.Uma i-coefficient yokunwetshwa yezinhlayiya ne-matrix ingafani, i-aggregate ne-matrix kulula ukuhlukaniswa uma kushisa noma kupholiswa.Kwenziwa ungqimba lwegebe phakathi kwabo, okuholela ekubonakaleni kwama-microcracks.Ukuba khona kwalezi zimfantu ezincane kuzoholela ekulimazeni izakhiwo zemishini yezinto ezibonakalayo, kodwa lapho impahla ibhekene nokushaqeka okushisayo.Egebeni eliphakathi kwe-aggregate ne-matrix, ingadlala indima ye-buffer zone, ekwazi ukumunca ingcindezi ethile futhi igweme ukugxilisa ingqondo kwi-crack tip.Ngesikhathi esifanayo, ukuqhekeka okushisayo okushisayo ku-matrix kuzomisa igebe phakathi kwezinhlayiya kanye ne-matrix, okungavimbela ukusakazeka kokuqhekeka.Ngakho-ke, ukumelana nokushisa okushisayo kwempahla kuyathuthukiswa.
Isikhathi sokuthumela: Apr-08-2022