Ipleyiti ye-sinter sisixhobo esisetyenziselwa ukuthwala kunye nokuthutha i-embryo ye-ceramic evuthayo kwi-kiln ye-ceramic.Isetyenziswa ikakhulu kwi-ceramic kiln njengesixhobo sokuthwala, ukugquma ubushushu kunye nokuhambisa iiseramics ezitshisiweyo.Ngayo, inokuphucula isantya sokuqhuba ubushushu kwipleyiti ye-sintering, yenza iimveliso ze-sintering zifudunyezwe ngokulinganayo, zinciphise ngokufanelekileyo ukusetyenziswa kwamandla kunye nokukhawulezisa isantya sokudubula, ukuphucula imveliso, ukwenzela ukuba i-ziko elifanayo likhuphe iimveliso ezingafaniyo ezingenambala kunye nezinye iingenelo.
Izinto zeCorundum mullite zinokuxhathisa ukothuka okuphezulu kwe-thermal kunye namandla aphezulu obushushu, kunye nokuzinza okuhle kweekhemikhali kunye nokumelana nokunxiba.Ke ngoko, inokusetyenziswa ngokuphindaphindiweyo kumaqondo obushushu aphezulu, ngakumbi kwi-sintered magnetic cores, i-ceramic capacitors kunye ne-insulating ceramics.
Iimveliso ze-Sintering ziimveliso ze-laminated sintering.Umaleko ngamnye wepleyiti ye-sintering kunye nobunzima bemveliso bumalunga ne-1kg, ngokwesiqhelo ngu-l0 umaleko, ngoko ke ipleyiti ye-sintering inokuthwala uxinzelelo olungaphezulu kweekhilogram ezilishumi.Kwangaxeshanye, ukuthwala i-thrust xa ushukuma kunye ne-friction yokulayisha kunye nokukhulula iimveliso, kodwa kunye nemijikelo emininzi ebandayo kunye neshushu, ngoko ke, ukusetyenziswa kokusingqongileyo kunzima kakhulu.
Ngaphandle kokuqwalasela intsebenziswano yezinto ezintathu, i-alumina powder, i-kaolin kunye neqondo lokushisa lokubala zonke zichaphazela ukuxhathisa ukothuka kwe-thermal kunye nokunyuka.Ukuxhathisa ukothuka kwe-thermal kuyanda kunye nokongezwa kwe-alumina powder, kwaye kuncipha ngokunyuka kobushushu bokudubula.Xa umxholo we-kaolin u-8%, ukuxhathisa ukothuka kwe-thermal yeyona iphantsi, ilandelwa ngumxholo we-kaolin we-9.5%.I-creep iyancipha kunye nokongezwa kwe-alumina powder, kwaye i-creep iyona ephantsi xa umxholo we-kaolin u-8%.Ubuninzi bokuchwetheza buphezulu kwi-1580 ℃.Ukuze unike ingqwalasela ukuxhathisa ukothuka kwe-thermal kunye nokumelana nokunyuka kwezinto, iziphumo ezilungileyo zifumaneka xa umxholo we-alumina u-26%, i-kaolin yi-6.5% kunye nobushushu be-calcination yi-1580 ℃.
Kukho i-gap ethile phakathi kwee-particle corundum-mullite kunye ne-matrix.Kwaye kukho ukuqhekeka okujikeleze amaqhekeza, okubangelwa ukungahambelani kwe-coefficient yokwandiswa kwe-thermal kunye ne-elastic modulus phakathi kwamaqhekeza kunye ne-matrix, okubangelwa yi-microcracks kwiimveliso.Xa i-coefficient yokwandisa amaqhekeza kunye ne-matrix ayihambelani, i-aggregate kunye ne-matrix kulula ukuhlukana xa ishushu okanye ipholile.Uluhlu lwe-gap lwenziwa phakathi kwabo, olubangela ukubonakala kwe-microcracks.Ubukho bala micro-cracks buya kukhokelela ekuthotyweni kweempawu zomatshini wezinto eziphathekayo, kodwa xa izinto ziphantsi kokutshatyalaliswa kwe-thermal.Kwisithuba esiphakathi kwe-aggregate kunye ne-matrix, inokudlala indima ye-buffer zone, enokuthi ifunxe uxinzelelo oluthile kwaye ithintele uxinzelelo loxinzelelo kwincam yokuqhekeka.Ngelo xesha, ukutshitshiswa kwe-thermal kwi-matrix kuya kumisa kwi-gap phakathi kweengqungquthela kunye ne-matrix, enokuthintela ukusasazeka kwe-crack.Ngaloo ndlela, ukuxhathisa ukutshitshiswa kwe-thermal yezinto kuphuculwe.
Ixesha lokuposa: Apr-08-2022