zirconia toughened alumina yakaratidza hukuru hwayo hwemagetsi zvichienzaniswa nemonolithic zirconia, kusanganisira kuomarara kwekutyoka uye simba rekuchinjika. Kugadzikana kweZTA kunobva pachikamu chayo chematrix chinodzivirira uye chinorambidza shanduko yezviyo tetragonal zirconia., kuibatsira kutsungirira kuparara pasi pe-in-vivo hydrothermal mamiriro.
Flexural Strength
Nekuwedzera zirconia kune alumina ceramics, zirconia toughened alumina inogadzirwa. Ichi chinyorwa chinoratidzira epamusoro flexural simba uye mechaniki kusimba mumamiriro ezvinhu anoida, uye zvakare inodzivisa kuparara kwemakemikari pamwe nekusangana nemvura yemuviri.
zirconia yakaomeswa alumina inogona kumira nekukurumidza kushanduka kwekushisa nekuda kwezvirconia zvimedu zvakaparadzirwa mukati mealumina matrix inotora simba rekupisa uye kugadzira zvinomanikidza kudzivirira kuputika., ichiita kuti ive yakakodzera kushandiswa mune dzakasiyana siyana maindasitiri mashandisirwo akadai sechoto zvikamu uye steam turbine injini.
Iyi inoumbwa ceramic inosanganisa hunhu hunokatyamadza hwezvose alumina uye zirconia kuendesa yakawedzera simba uye kupisa kwekuvhunduka kuramba., nehukukutu hwepamusoro, flexural simba, kuomarara kwekutyoka uye kupfeka kuramba kunopfuura 99% aluminium yakachena maererano nekuoma, kuoma uye kupfeka kuramba.
Kuputsika Kuoma
Zirconia inosimudzira kuomarara kwekutsemuka kwealuminium ceramics kuburikidza nekushandura kuomarara. Kana yarohwa, metastable yttrium-yakadzikama zirconia inoshandura kuita monoclinic crystal zvimiro izvo zvinoburitsa kudzvanya kushushikana kunodzivirira kuparuka..
Zirconia toughened alumina chinhu chakanakira kugadzira maturusi ekucheka nekuda kwekuoma kwayo, kugadzikana kwekushisa uye kushorwa kwekupokana. Uyezve, hukuru hwayo hwemagetsi hunobatsira zvakanyanya pakugara kwayo uye kuvimbika.
ZTA inogadzirwa kuburikidza negelcasting ine yakasarudzika musanganiswa wekushanduka kwesimba, kutyoka kuoma, biocompatibility uye kupisa / corrosion kuramba iyo inoita kuti ive yakakodzera kuvhiyiwa kwehudyu. Kuburikidza ne gelcasting maitiro zvinogonekawo kugadzirisa kuoma kwayo-kutsemuka kusimba-flexural simba paramita nekushandura slurry yakasimba yekurodha mazinga., mold ukobvu kana sintering tembiricha parameters kuti maximize migumisiro.
Stress-Strain Curves
zirconia toughened alumina material inozvirumbidza nesimba repamusoro uye kupfeka kuramba, pamwe nekuomarara kwakasarudzika kwekutsigira mitoro inorema pasina kuremara pasi pekumanikidzwa. Uyezve, inozvirumbidza yakanakisa kupisa kwekuvhunduka kunoigonesa kushivirira kamwe kamwe kushanduka kwekushisa pasina kutambura kuderedzwa..
Zirconia yemukati pamusoro peimwe muganho inowedzera kuchembera kuchembera kuburikidza ne microcracks yakagadzirwa panguva yekutonhora mushure mekunyura iyo inoita seyakasarudzika nzira dzekupinda kwemvura mune ceramic zvinhu., zvichiita kuti microcracks iumbwe panguva yekutonhodza iyo inoshanda senzira dzakasarudzika dzekupinda kwayo nekupararira mairi. Zvakasiyana, kana pazasi pechikumbaridzo ichi zirconia zvimedu zvinopinda kushushikana-induced shanduko kubva kune tetragonal phase kuenda ku monoclinic phase iyo inoderedza kuchembera kuderera..
Tensile Simba
Zirconia toughened alumina chinhu chakaoma uye chakasimba chine yakanakisa kupfeka kuramba uye kugadzikana kwemafuta, kuita kuti ive yakakodzera kune zvikamu zvinoda kutonhora. Uyezve, nzvimbo dzakagadzikana dzakadzikama seizvi dzinopa kutonga kwekupisa pamwe nekupokana kuchiita kuti ive sarudzo yakanakira zvinhu..
Under stress, ZTA inosangana neshanduko yechikamu kubva kune tetragonal kuenda ku monoclinic inodzivirira kupararira uye inowedzera kuomarara kwekupwanyika., asi zvimwe zvidzidzo zvinoratidza kuti kuwedzera kusina kugadzikana zirconia kunotungamirira kuderedza simba rekugadzirisa.
ZTA ceramics inowanzove ine 10%-20% zirconia, iyo inobvumira kuti igadziriswe zvakananga kune imwe neimwe application. ZTA ndeye biocompatible, tembiricha inodzivirira, corrosion-resistant, yakasimba zvakakwana kutsungirira kumanikidzwa, inodhura-inoshanda imwe nzira kune yakachena zirconia ceramics uye inogona kumira kutonhora kwakanyanya pasina kushatisa. Vagadziri vevhavhavha chisimbiso vanowanzoisarudza nekuda kwekuora-kupokana uye kumanikidza-kubata masimba. – hunhu hwese hwakanakira mavharuvhu seal application.
Impact Simba
zirconia toughened alumina inoshingirira mukuora uye ine simba rakatanhamara remuchina, kuita kuti dzive dzakakodzera kushandiswa kunoda kuoma uye kuoma panguva imwe chete. Uyezve, ZTA inopa mari yekuchengetedza pane yakachena zirconia ceramics.
Kubatanidza alumina uye zirconia inogadzira ceramic ine yakakwirira flexural simba, kutyoka kuoma, uye kupfeka kuramba kupfuura aluminium yakachena. Inogona kumira mitoro yakakwirira uye zvinokanganisa uye inowanzo shandiswa sekusimudzira pamusoro peyakajairwa alumina mumagadzirirwo anoda mamwe maficha..
Shanduko inoomesera nyaya iyi yakawedzera simba; pasi pemamiriro ekunetseka, zirconia particles inoshanduka kubva kune yavo tetragonal kusvika kune monoclinic chimiro uye kuwedzera, kudzvanya mitswe mune alumina matrix uye nekudaro zvichitungamira kune yakakwirira flexural simba kupfuura YSZ (Zvifananidzo 6c nad).
Corrosion Resistance
ZTA ceramic's musanganiswa wealumina uye zirconia inopa yakakwira corrosion kuramba kana ichienzaniswa nekuchena 99% alumina zvinhu chete, uye ane kuoma kwepamusoro, kutyoka kuoma, flexural simba, uye kuoma zvinhu kupfuura vakwikwidzi vayo.
ZTA inoratidzira kupfeka kwakatanhamara uye abrasion kuramba uye kuenderana kwemakemikari, zvichiita kuti ive yakanaka kune maindasitiri maapplication anoda yakakwira mechanika kusimba. Uyezve, Iko kusanganiswa kwezvinhu kunozvirumbidza yakanakisa yekupisa kuvhunduka inobvumira kukurumidza kuchinja tembiricha pasina kutsemuka kana kutsemuka.
Zirconia zvimedu zvinowedzerwa kune alumina matrix zvinowedzera kusimba kwayo kwekupwanyika kuburikidza nekushandura kuomarara., Mhedzisiro inokonzerwa nekusimbisa zirconia zvimedu zvinoshanduka kubva kune tetragonal kuenda kune monoclinic makristasi zvimiro pazvinenge zvichiratidzwa kune compressional kusagadzikana., kuburitsa kudzvanya kudzvinyirira kunotadzisa kupararira kwekuputika uye kuwedzera zvakanyanya kuoma kwayo kwekutyoka.
Thermal Shock Resistance
zirconia toughened alumina ndeye ceramic yepamusoro inosanganisa alumina uye zirconia. Kugadzira ZTA, zirconia inounzwa mukati meiyo huru alumina matrix isati yanyura kuti iwedzere simba uye kupisa kwekutya kupikisa pamusoro pechinyakare alumina ceramics.; uyezve inozvikudza yakakwirira kuoma, flexural simba, uye kuwanda kupfuura mumwe wayo.
ZTA toughening mechanism inosanganisira stress-induced phase shanduko kubva ku tetragonal kuenda ku monoclinic zirconia particle crystal structures., kuwedzera kuomarara kwekutyoka uku uchiidzivirira kubva pakuvhunduka kwemafuta uye mechanical abrasion. zirconia toughened alumina inonyanya kuenderana uye haiparare nekukurumidza, zvichiita kuti zvive zvakanaka kune zvisimbiso zvevhavha. Uyezve, simba rayo rakakwirira rinoita kuti rikwanise kumira kumanikidzwa kwemuviri zvinobudirira.