Sechikamu chakakosha chezvishandiso zveinjiniya uye zvinhu zvinoshanda, zvemberi zveceramic zvinhu zvine tarisiro yakakura yekushandisa musimba idzva, zvemagetsi zvekutaurirana, semiconductor, aerospace uye mamwe maindasitiri minda. Nekudaro, nekuti ceramic poda inonyanya ionic bond kana covalent bond kombi, iyo yechinyakare sintering process yekugadzirira dense.ceramic zvinhuinoda tembiricha yepamusoro yekupisa uye nguva yakareba yekubata, izvo zvinotungamira mukukora zviyo uye kusara kweporosity, uye zvino kukanganisa zvimiro zve.Ceramic jekiseni kuumba. Kuti kuderedzasimbi sinteringtembiricha, kupfupisa sintering nguva, kunatsiridza sintering density uye zvinhu zvinhu, vatsvakurudzi vakagadzira akasiyana-siyana matsva sintering matekinoroji.
Spark plasma sintering (SPS)
SPS tekinoroji imhando nyowani yekukurumidza sintering tekinoroji yanga ichinetsekana zvakanyanya uye yakadzidzwa munyika yezvidzidzo. FIG. 1 inoratidza kushanda kwayo musimboti.
SPS tekinoroji yakapayona kuunzwa kweiyo dc pulse ikozvino musintering process. Iyo indenter inoshanda semutakuri weiyo ikozvino kuti ipfuure nepo ichiisa kumanikidza kune izvo zvinhu. Kusiyana nemaitiro echinyakare ekupisa, ayo anowanzo shandisa kupisa kupenya kwemuviri wekudziya, SPS inoshandisa kupisa kweiyo hombe yemagetsi inopfuura nemuforoma kana kuitisa sampuli kupisa zvinhu. Kune insulating samples, graphite ine yakanaka conductivity yemagetsi inowanzo shandiswa seyakaumbwa zvinhu, uye kupisa kwekupisa kwe mold kunoshandiswa kuita kuti sampu isimuke nekukurumidza. Kune conductive samples, insulating mold inogona kushandiswa kupisa ikozvino zvakananga kuburikidza nemuenzaniso. Iyo yekudziya mwero inogona kusvika 1000 ℃ / min. Kana iyo sampuli tembiricha inosvika pakukosha kwakatarwa, sintering inogona kupedzwa mushure mechinguva chidiki chekuchengetedza kupisa.
SPS tekinoroji ine mabhenefiti epasi sintering tembiricha, nguva pfupi yekubata, kukurumidza kupisa mwero, inogadziriswa sintering pressure, uye multi-field coupling (electric-mechanical-thermal).
Flash sintering (FS)
FS tekinoroji yakatanga kutaurwa muna 2010 naCologna et al kubva kuYunivhesiti yeColorado, zvichibva pakudzidza kwemunda-akabatsira simbi poda sintering tekinoroji (FAST)
FS tekinoroji inonyanya kusanganisira matatu maitiro paramita, anoti tembiricha yevira (Tf), kusimba kwemunda (E) uye ikozvino (J). Mufananidzo 3C unoratidza kushanduka kwemaitiro ega ega parameter mune yechinyakare FS maitiro. Mumamiriro ezvinhu aya, nzvimbo yemagetsi yakagadzikana inoshandiswa kune zvinyorwa uye kutonhora kwechoto kunokwira pamwero wenguva dzose. Kana tembiricha yevira yakadzikira, iyo resistivity yezvinhu yakakwira uye ikozvino inoyerera kuburikidza nezvinhu idiki. Nekuwedzera kwekushisa kwechoto, sampuli resistivity inoderera uye ikozvino inowedzera zvishoma nezvishoma. Danho iri rinonzi incubation stage uye system yacho inodzorwa nevoltage. Kana tembiricha yechoto ichikwira kusvika kune yakanyanya kutonhora tembiricha, iyo inodzivirira zvinhu inodonha kamwe kamwe, ikozvino inokwira zvakanyanya, uye FS inoitika. Sezvo simba remumunda richiri kugadzikana panguva ino, simba rehurongwa (W = EJ) richakurumidza kusvika pamuganhu wemagetsi emagetsi, uye hurongwa huchachinja kubva pakugadzirisa magetsi kusvika kune ikozvino kutonga, iyo inonzi FS stage. Kana iyo resistivity yezvinhu isingasimuki, simba remunda rinodzikama zvakare, uye sintering inopinda munhanho yakagadzikana, kureva, nhanho yekudzivirira yeFS. Mushure mechikamu chekudzivirira, chirongwa chakazara cheFS chinopera.
Kana ichienzaniswa neyechinyakare sintering, FS ine zvinotevera zvakanakira: kupfupisa sintering nguva uye kuderedza tembiricha yechoto inodiwa pakunyungudika, inhibitsa kukura kwezviyo, inogona kuwana isiri-equilibrium sintering, midziyo iri nyore, mutengo wakaderera.
Nguva yekutumira: Jun-07-2022