Kuoma Kusingaenzaniswi NaZirconia Zvakaoma Alumina (ZTA) Ceramics

Zirconia Toughened Alumina (ZTA) Ceramics inozvikudza kusimba kusingaenzaniswi. Vanozvirumbidza pamusoro pekusapfeka, kemikari inertness uye yakaderera friction yekuita isingaite mumabasa emazuva ese – tisingatauri kuoma kwepamusoro uye kuoma kudarika simbi.

ZTA inosanganisira metastable tetragonal zirconia polycrystal agglomerates mune alumina matrix iyo inosangana nekushushikana-induced chikamu shanduko kuita monoclinic fomu pasi pekushushikana., nokudaro kuparadzira kucheka kwekucheka uye kumisa kupararira kwekutsemuka, inowanzozivikanwa sekushandura kuomesa.

Corrosion Resistant

ZTA inopa hukuru hwemakemikari kuramba kana ichienzaniswa nealumina yakachena uye inogona kumira zvakanyanya tembiricha pasina kushatisa, zvichiita kuti ive iyo yakanakira zvinhu sarudzo yekushandiswa kwemaindasitiri munzvimbo dzakaomarara uye mamiriro.

Kuoma kweZTA kunowedzerwa ne zirconia particles izvo zvinoparadzira uye kutora simba, kubatsira kudzivirira kutsemuka. Kana yaiswa yttrium oxide, zirconia inoshanduka kubva kune metastable tetragonal phase kuenda ku monoclinic panguva yekushushikana kuti iite compression stress inowedzera kutyoka kuoma..

Zirconia-based ceramics yakadai seZTA ine alumina particles kudzivirira kupisa kwekushisa. Izvi zvinoibvumira kumira nekukurumidza kuchinja kwekushisa pasina kutsemuka kana kutadza mukushanda kwepamusoro maapplication sekukuya nekucheka; kuwedzera kwayo kwakaderera kwemutsara uye torsional kunopa kwakatanhamara kutakura mutoro uye kugona kwekuita. ZTA inodada 2-3 nguva dzakasimba kusimba kusimba kana ichienzaniswa nealumina yakachena uku iine yakaderera mutsara / torsional yekuwedzera coefficients yeakasarudzika kutakura mitoro uye kugona kwekuita..

Kuoma Kwepamusoro

ZTA inosanganisa kusimba uye kusimba kwealumina ne zirconia inoomesa kune yakasarudzika zvinhu zvekushandisa zvinodikanwa.. Kusanganiswa uku kunopa simba risingaenzaniswi, kutyoka kuoma, elasticity uye kuoma zvivakwa mune imwe package.

Claussen akawana mukati 1976 iyo kuwedzera isina kugadzikana zirconia kune alumina inowedzera zvakanyanya kutsemuka kwayo kuoma, nekuda kweiyo tetragonal-monoclinic shanduko yeakapararira yakanaka tetragonal precipitates akapararira mukati me matrix ayo.. Matunhu akadaro anodzorwa anodziviswa kubva pakuchinja kusvika aburitswa neinoswedera kumberi kana imwe sosi yekuzorodza kubva mukumanikidza kwavo., zvakadai sokunyunguduka.

Kupisa-kudzvanywa 10mol% yttria-yakagadzikana zirconia (10YSZ), inosimbiswa nechero ma particulate kana maplatelet ane kubva 0 kusvika ku30wt% alumina zvemukati zvakaiswa pasi pesimba rakasimba, kuomarara kwekutsemuka uye kunonoka bvunzo dzekukura pa1000C mumhepo. Mhedzisiro yakaratidza kuti yakanyanya kuchinjika simba uye kutsemuka kuomarara kweplatelet anoumbwa zvakawanikwa neichi chinyorwa..

High Tensile Simba

Zirconia ceramics inopa kusanganisa kunoshamisa kwesimba, resilience, uye kushandiswa kwakasiyana-siyana kunopfuura kure kure echinyakare tekinoroji ceramics. Zirconia formulations seZTA inopa mhinduro dzemazuva ano dzakaomesesa zvikumbiro kubva kuzvinhu zvemuchadenga zvinotsungirira nharaunda dzakaomarara kusvika kune inotevera-chizvarwa biomedical implants yakagadzirirwa kurarama kwenguva refu. – kupa mhinduro dzakavimbika kune zvinonyanya kunetsa nhasi.

ZTA inomira pachena pakati pezvimwe zvinhu nekuda kwesimba rayo repamusoro, kutyoka kuomarara uye kuramba kupararira kupararira nekuda kweiyo metastable tetragonal chikamu. Shanduko iyi kuita monoclinic zirconia pane tembiricha yakaderera inomanikidza nzvimbo pamberi pemutswe kumberi kumisa kuwedzera kukura.

Yttria Chikamu Yakagadzikana Zirconia (Y-TZP) uye Cerium Partially Stabilized Zirconia (Chii-TZP) ratidza kusimba kwakasiyana kwakafanana neZTA nekuda kwekuchengetwa kwechikamu chetetragonal nekuchengetedza yttria kana cerium pakudziya kwakadzika., kubvumira shanduko pane inodzoreka tembiricha renji uye kuratidza kushoma kukuvara kwepasi panguva yecyclic kurodha bvunzo kupfuura vamwe veAlumina..

Low Friction

Zirconia ndeimwe yeakaomesesa einjiniya ceramics iripo uye yakaderera friction zvivakwa zvinobatsira kuwedzera kupfeka kuramba uku ichidzikisa zvinodikanwa zvekuzora..

ZTA ceramics ine alumina yekunyanya kuomarara. Izvi zvinobvumira metastable yttria-yakagadzikana tetragonal zirconia zvimedu mune alumina matrix kuti irambe isina kuchinjwa., yasara yakanatswa nekuda kwemambure akarukwa ezviyo.

Kudzorwa kuumbwa uye mamiriro ekugadzirisa anovimbisa kuti ega ega tetragonal-to-monoclinic shanduko haiitike pakutonhora kubva kune sintering tembiricha., zvichibatsira mukukwanisa-kurova kwakawanda mukuyedza kuomarara kwekupwanyika. Uyezve, yakakwira homogeneity mualuminium-zirconia macomposites ane saizi diki yezviyo zvinokonzeresa kushomeka kwesimba izvo zvinozoshandura kune kupfupika kupfupika panguva yekuedzwa kwedhaimani..

Kuwedzera Kwekupisa Kwepamusoro

Simba rekusunga reAlumina matrix rinoita kuti ridzivirire tetragonal zirconia particles kubva pakushanduka kuva monoclinic zirconia pakutonhora., saka kugadzira 10 mole % yttria-yakadzikama zirconia-alumina composites yakagadzikana uye inoputika pasina.

Kuwedzerwa kwecerium kune zirconia kunobvumira kuti igare yakagadzikana (Chii-TZP). Ce-TZP inochengeta tetragonal chikamu patembiricha yekamuri uye inowedzera kuoma, kuomarara kwekutyoka uye simba rekuchinjika zvichienzaniswa neyechinyakare mazino ceramic zvinhu.

Zirconia Toughened Alumina macomposites anosanganisira Ce-TZP, yttria-yakadzikama zirconia (Y-TZP), kana magnesia-yakagadzikana zirconia (Mg-PSZ) ratidza kusimba kwakasiyana kunodarika iyo yealumina uye monolithic zirconia, kuita ZTA mumiriri akakwana wekuda kunyorera senge maimplants ekurapa, Aerospace zvikamu uye michina yemaindasitiri. ZTA zvakare inozvirumbidza akawanda emakemikari anodzivirira anodzivirira kubva kumaasidhi, munyu mhinduro, yakanyungudutswa munyu alkalis pamwe chete tembiricha.