Zirconia Yakaomeswa Alumina YeAdvanced Applications

ZTA ndeye alumina-zirconia composite zvinhu, inosiyaniswa nesimba repamusoro uye kuoma. Yakagadzirwa kuburikidza nekushushikana-induced shanduko yeakanaka tetragonal zirconia particles mune alumina matrix..

Zirconia ceramics zvinhu zvinoshamisa zvehunyanzvi, Kuzvikudza kuomarara, kugadzikana kwekupisa, kupfeka kupikisa uye kushanda nharaunda uko mamwe akawanda ekeramics asingakwanisi kuita. Simbi nemapurasitiki hazvigone kuenzanisa. Uyezve, zirconia ceramics zvakare inoratidza kuomarara kwakatanhamara kwekugadzira maturusi.

Simba

ZTA inomira pakati pezvigadzirwa zveceramic nesimba rayo rinoshamisa uye kuoma, kupfeka kuramba, makemikari inertness, low friction coefficient, kuoma kwepamusoro / kuomarara reshiyo uye yakadzikira kupisa kwekuwedzera coefficient zvichienzaniswa nevamwe vazhinji – zvichiita kuti ive yakanakira zvinhu zvekushandisa senge maturusi ekucheka. Uyezve, biocompatibility yayo inoitawo kuti ZTA ive inokwezva zvinhu sarudzo.

ZTA inotsanangurwa nekugovera kwayo kwakafanana kwe tetragonal zirconia particles mukati me alumina matrix. Izvi zvinopedzwa pachishandiswa nzira dzakaoma kunzwisisa dzekusanganisa senge bhora rekugaya uye high-energy attrition milling.; kana yangosanganiswa pamwe chete hupfu hunogona kuzogadzirwa kuita chikamu chavanoda vachishandisa kudzvanya kwakaoma, isostatic kudzvanya, jekiseni molding kana extrusion maitiro.

Zirconia yakaparadzirwa mukati mealumina matrix inovandudza kutyoka kuomarara nekutora nekubvisa simba rekutsemuka., inozivikanwa seshanduko toughening. Zirconia inobatsirawo kupfeka kusagadzikana nekugadzira compressive stress inodzivirira kupararira kwekuputika – inozivikanwa sekuzvirodza – kuita ZTA yakanakisa sarudzo yekukuya mavhiri.

Kuoma

Zirconia Toughened Alumina (ZTA) Ceramics inozvirumbidza nesimba rinoshamisa uye kuomarara kwekutsemuka, zvichiita kuti zvive zvakakwana kuti zvishandiswe mumhando dzakasiyana dzemashandisirwo uye nharaunda. Uku kusimba kunoshamisa kunobva mukushushikana-induced chikamu shanduko yezvakanaka, zvakafanana akaparadzirwa tetragonal zirconia particles akaparadzirwa mukati mealumina matrix; kushushikana kunokonzera shanduko yechikamu kuti igadzire microcrack network ye zirconia-alumina inotora simba rekutsemuka kupararira zvinonyatso kunonoka kupararira kwavo uku ichiwedzera kutyoka kuramba. (Clausen 1976).

ZTA inomira pachena nekuda kwekukatyamadza kwayo kuvhunduka kwekutya. Kutenda kusanganiswa kwayo kwakasiyana kwe tetragonal-monoclinic phase composition, iyi ceramic inogona kumira nekukurumidza kuchinja kwekushisa pasina kuputika kana kuputsika, nepo kushushikana-kunokonzeresa shanduko ye zirconia kuita yayo metastable tetragonal fomu inogadzira compressive stress inopesana nekuumbwa kwepakatsemuka mukati mealumina matrix yayo uye zvakanyanya kuwedzera kuomarara zvichibva zvawedzera kuwedzera kushanda kweZTA..

ZTA inozvirumbidza kwete chete kusimba kwayo, tetragonal-monoclinic chimiro uye yakakwirira kuputsika kusimba, asiwo yakaderera coefficient of thermal kuwedzera (CTE), kuita kuti ive yakakodzera kune zvikumbiro zvinoda kupisa kwakanyanya kana nharaunda uko kugadzikana kwedimensional kwakakosha, senge chaiyo zvikamu kana zvemagetsi mapakeji.

ZTA inomira pakati pezvigadzirwa zvekurapa nekuda kwekusanganiswa kwayo kwemakemikari kuramba, mechanical zvivakwa uye kushushikana kwaibatsira ngura kuramba mumvura kana zvinwiwa zvemuviri, zvichiita kuti ive mumiriri wepamberi wezvimisikidzo zvekurapa senge orthopedic femoral misoro uye acetabular liners.. BioLOX Delta biomaterial mumwe muenzaniso wakadaro; yakashandiswa zvakanyanya panguva yekuvhiyiwa kwemapfupa kune ese ari maviri maapplication.

Corrosion Resistance

ZTA inozvirumbidza pamusoro pezvinhu zvose zviri zviviri alumina uye zirconia, zvichiita kuti ive yakanyanya kupikisa kune zvese makemikari kurwisa uye kupfeka, kuita kuti ive yakakwana kune maapplication anosanganisira nharaunda-inokonzeresa nharaunda kana kudzokorora friction kana mechanic stress..

Kubatanidza kuomarara kwealumina nekuoma kwe zirconia kunoguma neakanakisa tribological zvivakwa izvo zvinogadzira yakanakisa kupfeka kuramba muzvikamu zvine mitoro inorema uye kushandiswa kwenguva refu., zvakadai semishonga yemapfupa, maturusi ekucheka uye kupfeka zvinodzivirira zvinhu zvinoshandiswa mukugadzirisa mvura (thread guides, ma bearings, nozzles etc). Musanganiswa uyu unonyanya kushanda muzvirongwa zvekurapa nemaindasitiri senge orthopedic implants, maturusi ekucheka kana kutungamira kwemvura (thread guides bearing nozzles etc).

ZTA yakawedzera kutyoka kusimba kunogona kuverengerwa kune yayo yakagovaniswa zvirconia zvimedu mune yayo alumina matrix.. Kana mitswe ikatanga kupararira, apo simba ravo rinowedzera uye richipararira mberi, idzi tetragonal zirconia zviyo zvinopinda shanduko yechikamu kuti itore nekuibvisa sechikamu cheshanduko inoomesa michina. – nokudaro kuvandudza kuomarara kwekutsemuka kwechinhu ichi.

Kubudirira mukugadzira ZTA ceramic iri mukushandisa premium-mhando zirconia uye alumina poda isina tsvina.. Sintering must be controlled to avoid spontaneous tetragonal-to-monoclinic zirconia transformation during cooling and to minimize metastable monoclinic phase formation which is susceptible to chemisorption with water molecules that leads to low temperature degradation over long term usage; Saint-Gobain ZirPro’s ZTA ceramic’s sintering process was specifically created to avoid such undesirable phenomena. Luckily Saint-Gobain ZirPro ceramic’s ZTA ceramic is designed specifically to prevent such phenomena from happening –

Thermal Stability

Zirconia Toughened Alumina (ZTA) can withstand rapid changes in temperature without cracking or breaking, thanks to zirconia particles dispersed within an alumina matrix absorbing heat energy and creating compressive stresses which prevent cracking and failure. Nekuti ZTA inotora simba rekupisa zvakanyanya, chinhu ichi chinoita sarudzo yakanakisa yezvishandiso zvinoda kushivirira kwakanyanya.

Kuwedzera zirconia kune alumina matrix kunogona kuwedzera kuomarara kwekupwanyika uku panguva imwe chete ichivandudza ma mechanic zvinhu senge simba uye kupfeka kuramba.. Kuwedzera kuomarara kwekutyoka muZTA kunokonzerwa neshanduko inokonzeresa kushushikana kubva pachikamu che metastable tetragonal kuenda kuchikamu chemonoclinic pane tembiricha.; mhedzisiro inokwidziridzwa nediki zirconia zviyo saizi pane izvo zviri mualuminium.

Mastabilizer anowanzo shandiswa kuchengetedza tetragonal zirconia chikamu muZTA zvinhu zvakaita seBiolox Delta.; zvisinei, mhedzisiro yakafanana inogona kuwanikwa pasina stabilizer maererano nekugovera kwechidimbu uye kuomarara kwekutsemuka.

Musanganiswa wealumina uye zirconia unogadzira yakakwira ceramic inokunda pakusimba, kutyoka kuoma, elasticity uye kuoma – hunhu hwakakosha kune maapplication anoda dhizaini mashandiro uye kusagadzikana kwekuora. ZTA Ceramics inowanzopfuura 99% alumina ceramics pakuva nemutengo-unoshanda uchisangana chaiwo application inoda zvakanyanya; chiyero chavo chinogona kutogadzirwa zvakananga.