Yepamberi Kuomarara kweMaindasitiri Zvikumbiro

Zirconia Toughened Alumina (ZTA) Ceramic zvikamu zvinosanganisa kuoma uye kusimba kwealumina pamwe ne zirconia's yepamusoro kuputsika kusimba kuendesa kuita uye hupenyu hurefu hwemaindasitiri ekushandisa..

Stress-induced shanduko yeakanaka tetragonal zirconia zvimedu zvakanyudzwa mukati mealumina matrix zvinotungamira kune ZTA zvinhu zvine simba repamusoro uye kuoma., yakakodzera kushandiswa munzvimbo dzakasiyana-siyana dzakaoma.

Kuoma

ZTA zvinhu zvinosanganisa kuomarara kwealumina nekuomarara kwe zirconia zvekuramba kusingaenzaniswi kupfeka nekupwanya.. Mhedzisiro iyi inogoneka kuburikidza nekushushikana-induced shanduko yakaoma: kana wadzvinyirirwa, zirconia particles shanduko kubva kune yavo metastable tetragonal chikamu mune yakagadzikana monoclinic fomu; kuwedzera kwevhoriyamu kunokonzerwa nekushandurwa kwechimiro kunobatsira kuvhara chero makatsemuka mukati mealumina matrix uye kuwedzera kuomarara zvakanyanya..

ZTA ine zirconia maplatelet ayo anonyungudika kuita alumina matrix panguva yekunyura, kunatsiridza kusimba kwekutyoka uye kusimba uku uchiwedzera kuomarara kwekutyoka, kugadzira chinhu chine simba guru rekushanduka-shanduka kupfuura Y-TZP uye kusvika kaviri simba rayo rekuneta kwekuneta. Uku kusanganiswa kwekuomarara kubva kualuminium yakasanganiswa ne zirconia simba inoita kuti ZTA ive yakanakisa sarudzo yezvigadzirwa zvemaindasitiri maapplication anoda kukuvara kurwisa..

Kugara kwenguva refu

Zirconia Toughened Alumina (ZTA) inozvirumbidza yakanakisa flexural uye compressive masimba, ine kuderera kwekuwedzera kwemafuta kwakaenzana nealumina uye yakasarudzika kupfeka inodzivirira zvivakwa.

Zirconia toughened alumina inogadzirwa nekuwedzera tetragonal zirconia zviyo kuburikidza nekushushikana-induced shanduko kune yakaoma alumina matrix., kuvaisa muchimiro chayo uku vachiganhurira shanduko yavo kunzvimbo dzenzvimbo panzvimbo yekupararira kwese.

Iyi nzira inoita kuti alumina-zirconia composites igare yakasimba kupfuura monolithic zirconia nekuda kwekuramba kwayo kunyura kwemvura kuburikidza ne chemisorption.; monolithic zirconia inogona kutora polar mvura mamorekuru ayo anotungamira kune yakaderera tembiricha kudzikira uye pakupedzisira kuparara mushure mekushandiswa kwenguva refu..

ZTA, pane rimwe divi, yakanyatsogadzirwa kuti ifambise iyi tetragonal-to-monoclinic shanduko kuburikidza nemaitiro ezvimiro uye makemikari anowedzera.. CeramTec inotengesa Biolox Delta ZTA semuenzaniso; kuumbwa uku kune yttria uye strontium aluminate yekufambisa nzira dzakasimba mukati mechikamu chayo che zirconia uye nekudaro ine njodzi shoma yekudzikira kwakadzika tembiricha uchishingirira nharaunda tembiricha..

Corrosion Resistance

ZTA ceramics inopa yakakwira corrosion kuramba pamusoro pevamwe vavo alumina uye nekudaro inogona kushandiswa mumidziyo iri pasi penzvimbo dzakaomarara.. Uyezve, ZTA inogona kumira tembiricha yakakwira ichipa kugadzikana kwakanyanya kwemakemikari.

Garvie et al (1975) yakaratidza kuti kuwedzera 10-20% isina kugadzikana zirconia inogona kuwedzera zvakanyanya kuomarara kana ichienzaniswa nealuminium, kuburikidza nekushandura toughening. Iyi nzira inoitika kana yakanyatsoparadzirwa tetragonal metastable precipitates inoshanduka kuita monoclinic zirconia pasi pekunetseka kunokonzera kuwedzera kwevhoriyamu iyo inomanikidza mitswe uye inonoke kana kumisa kupararira kwavo..

Iyi michina yakafanana neye deformation-induced stress; zvisinei, kuitira kukonzera shanduko yechikamu chikamu chekushushikana chinofanira kunge chakakura zvakakwana; kune makatsemuka mumienzaniso yeZTA iyi simba rinobva mukukotama kushushikana panzvimbo dzekutyoka.

Heat Resistance

Zirconia Toughened Alumina inozvirumbidza nepamusoro-soro yekunyungudika uye kusagadzikana kwemarara, zvichiita kuti ive yakanakira zvinhu zvemichina inogara ichiratidzwa kune tembiricha yakakwira. Uyezve, iyi mutsauko ine yakakura kukwesha-kupokana pane yakajairwa alumina, kubatsira kuderedza kusakara-kubvaruka pamidziyo yakafumurwa kune yakakwira mwero wekinetic simba.

ZTA ceramics inogadzirwa kuburikidza nekushushikana-induced shanduko ye tetragonal zirconia particles kuita alumina matrix., kugadzira zvinodzvinyirira mukati mavo izvo zvinodzivirira kupararira kwe crack, kuwedzera kusimba uye kusimba uku uchipa kupisa kwekuvhunduka pasina kutsemuka kana kutsemuka. Vanozvirumbidza zvakanakisa thermal shock resistance; kupikisa kukurumidza kuchinja kwekushisa pasina kuputsika kana kuputika pasi pekunetseka.

Zirconia-toughened alumina ine zvakawanda zvekushandisa mumaindasitiri akawanda nekuda kwehukuru hwayo hwezvivakwa. Mechanical engineering inoshandisa iyo pombi zvikamu uye zvisimbiso; semiconductor processing inoshandisa iyo nekuda kwekugadzikana kwayo kwekupisa uye simba; aerospace, emotokari uye maindasitiri emagetsi anoishandisa sezvikamu zveinjini nekuda kwekupokana kwayo nekuora uye makemikari ane hutsinye.; inogona kunyange kumira yakakwirira flexural simba remazino kudyara!