i-zirconia eqinile i-alumina ibonakalise iimpawu zayo eziphezulu zoomatshini xa kuthelekiswa ne-monolithic zirconia, kubandakanywa ukuqina kokwaphuka kunye namandla okuguquguquka. Uzinzo lwe-ZTA luvela kwisigaba sayo se-matrix esikhusela kwaye sithintela ukuguqulwa kweenkozo ze-tetragonal zirconia., ukuyinceda imelane nokuthotywa phantsi kweemeko ze-in-vivo hydrothermal.
Amandla e-Flexural
Ngokudibanisa i-zirconia kwi-alumina ceramics, i-zirconia i-alumina eqinile yenziwa. Esi sixhobo sibonisa amandla aphezulu e-flexural kunye nokuqina koomatshini kwiimeko ezifunayo, kwaye ixhathisa ukubola kweekhemikhali kunye nokuba sesichengeni kulwelo lomzimba.
i-zirconia eqinile i-alumina inokumelana nokuguquguquka okukhawulezileyo kobushushu ngenxa yamasuntswana e-zirconia asasazwe ngaphakathi kwe-alumina matrix efunxa amandla obushushu kunye nokudala uxinzelelo olucinezelayo ukunqanda ukuqhekeka., ukuyenza ilungele ukusetyenziswa kwimizi-mveliso eyahlukeneyo enje ngezixhobo zesithando somlilo kunye neenjini zeinjini yomphunga.
Le ceramic edibeneyo idibanisa iimpawu ezithandekayo ze-alumina kunye ne-zirconia ukuhambisa amandla angaphezulu kunye nokumelana nokothuka kwe-thermal., ngobulukhuni obuphezulu, amandla okuguquguquka, ukuqina kokwaphuka kunye nokumelana nokunxiba okungaphaya 99% i-alumina ecocekileyo ngokobulukhuni, ukuqina kunye nokumelana nokunxiba.
Ukuqina kokwaphuka
I-Zirconia yongeza ukuqina kokwaphuka kweeseramikhi ze-alumina ngokuguqulwa kokuqina. Xa kubethiwe, I-metastable yttrium-zirconia-zirconia iguqulela kwi-monoclinic crystal izakhiwo ezivelisa uxinzelelo oluthintela ukusabalalisa.
I-Zirconia ilukhuni i-alumina yinto efanelekileyo yokwenza izixhobo zokusika ngenxa yobunzima bayo, ukuzinza kwe-thermal kunye nokuchasana nokuxhatshazwa. Ngaphaya koko, iimpawu zayo eziphezulu zoomatshini zinegalelo elikhulu ekomelezeni nasekuthembekeni kwayo.
I-ZTA eveliswe nge-gelcasting inendibaniselwano ekhethekileyo yamandla aguquguqukayo, ukwaphuka kokuqina, i-biocompatibility kunye nokushisa / ukunyameka kokubola okwenza ukuba ilungele utyando lokutshintshwa kwe-hip. Ngokusebenzisa iinkqubo ze-gelcasting kuyenzeka ukuba ulungelelanise ubulukhuni-ukwaphuka ukuqina-iparamitha zamandla aguquguqukayo ngokuguqula amanqanaba okulayisha okuludaka., Ubukhulu bokungunda okanye iparameters zobushushu be-sintering ukunyusa iziphumo.
I-Stress-Strain Curves
I-zirconia eqinile ye-alumina iqhayisa amandla aphezulu kunye nokumelana nokunxiba, kunye nobulukhuni obukhethekileyo bokuxhasa imithwalo enzima ngaphandle kokukhubazeka phantsi koxinzelelo. Ngaphaya koko, inokumelana nobushushu obubalaseleyo obuyenza ikwazi ukunyamezela ukuguquguquka okukhawulezileyo kobushushu ngaphandle kokuthotywa komgangatho..
Isiqulatho seZirconia esingaphezulu komda othile wonyusa ukuthotywa kokuguga ngokusebenzisa ii-microcracks ezenziwe ngexesha lokupholisa emva kokupholisa ezisebenza njengeendlela ezikhethiweyo zokungena kwamanzi kwizinto ze-ceramic., okukhokelela ekubeni kwenziwe ii-microcracks ngexesha lokupholisa ezisebenza njengeendlela ezikhethiweyo zokungena kunye nokusasazeka kuyo. Ngokuchaseneyo, xa ngaphantsi kwalo mqobo amasuntswana e-zirconia afumana utshintsho olubangelwa luxinzelelo ukusuka kwisigaba se-tetragonal ukuya kwisigaba se-monoclinic esinciphisa ukuthotywa kokuguga..
Tensile strength
I-Zirconia eqinile i-alumina yinto enzima kwaye ehlala ixesha elide enokumelana okugqwesileyo kunye neempawu zokuzinza kwe-thermal, ukuyenza ilungele amacandelo afuna ukupholisa. Ukongeza, Imiphezulu ezinzileyo eshushu efana nale ibonelela ngolawulo lobushushu kunye nokumelana nokukhuhlana kubenza babe lolona khetho lufanelekileyo lwemathiriyeli..
Ngaphantsi koxinzelelo, I-ZTA ifumana utshintsho lwesigaba ukusuka kwi-tetragonal ukuya kwi-monoclinic ethintela ukwanda kokuqhekeka kunye nokwandisa ukuqina kokwaphuka., kodwa uphando oluthile lubonisa ukuba ukunyuka kwe-zirconia engazinzanga kukhokelela ekunciphiseni amandla okuqina.
Iiseramikhi zeZTA zihlala ziqulathe 10%-20% zirconia, evumela ukuba ilungiselelwe ngokukodwa kwisicelo ngasinye. I-ZTA iyahambelana nebhayoloji, ukumelana nobushushu, ukumelana nomhlwa, yomelele ngokwaneleyo ukumelana noxinzelelo, Enye indlela engabizi kakhulu kwi-zirconia ceramics ecocekileyo kwaye inokumelana nokushisa okuphezulu ngaphandle kokuthotywa. Abavelisi betywina bevalve bahlala beyikhetha ngenxa yokumelana nomhlwa kunye namandla okubamba uxinzelelo. – zonke iimpawu zilungele ukusetyenziswa kwevalve yesitywina.
Amandla empembelelo
I-zirconia yokuqina i-alumina imelana nomhlwa kakhulu kwaye inamandla akhethekileyo ngoomatshini, ukwenza ukuba zilungele izicelo ezifuna ubulukhuni kunye nokuqina ngaxeshanye. Ngaphaya koko, I-ZTA ibonelela ngogcino lweendleko ngaphezu kweeseramikhi ezicocekileyo ze-zirconia.
Ukudibanisa i-alumina kunye ne-zirconia yenza i-ceramic enamandla aphezulu aguquguqukayo, ukwaphuka kokuqina, kwaye unxibe ukuxhathisa kune-alumina ecocekileyo. Inokumelana nemithwalo ephezulu kunye neempembelelo kwaye ihlala isetyenziswa njengophuculo ngaphezulu kwe-alumina eqhelekileyo kuyilo olufuna iimpawu ezongezelelweyo..
Utshintsho oluqinisayo lubangela oku kwandisa amandla; phantsi kweemeko zoxinzelelo, amasuntswana e-zirconia atshintsha ukusuka kwi-tetragonal ukuya kwimilo ye-monoclinic kunye nokwandisa, ukucinezela iintanda kwi-alumina matrix kwaye ngaloo ndlela ikhokelela kumandla aphezulu aguquguqukayo kune-YSZ (Amanani 6c kunye no-d).
Ukunyangwa kokuMhlwa
Indibaniselwano ye-ZTA ye-ceramic ye-alumina kunye ne-zirconia ibonelela ngokumelana nokugqwesa okuphezulu xa kuthelekiswa nokusulungekileyo 99% izixhobo ze-alumina zodwa, kwaye unobulukhuni obuphezulu, ukwaphuka kokuqina, amandla okuguquguquka, kunye neempawu zobulukhuni kunabo bakhuphisana nabo.
I-ZTA ibonakalisa ukunxiba okugqwesileyo kunye nokuxhathisa kwe-abrasion kunye nokuhambelana kweekhemikhali, iyenza ilungele usetyenziso lwemizi-mveliso efuna ukuqina koomatshini. Ngaphaya koko, udibaniso lwemathiriyeli luqhayisa ngokuxhathisa ukothuka kwe-thermal evumela utshintsho olukhawulezayo lobushushu ngaphandle kokuqhekeka okanye ukwaphuka.
Amasuntswana eZirconia adityaniswe kwimatrix ye-alumina anyusa ukuqina kokwaphuka kwawo ngokuguqulwa kokuqina., Isiphumo esibangelwa kuxinzelelo lwezirconia zamasuntswana atshintsha ukusuka kwi-tetragonal ukuya kwi-monoclinic crystal structures xa evezwe kuxinzelelo loxinzelelo., ukuvelisa uxinzelelo olucinezelayo olunqanda ukwanda kokuqhekeka kunye nokwandisa kakhulu ukuqina kwayo kokwaphuka.
Ukunyangwa kweThermal Shock
i-zirconia eqinile i-alumina yi-ceramic ephezulu edibanisa i-alumina kunye ne-zirconia. Ukwenza i-ZTA, I-zirconia yaziswa kweyona matrix ye-alumina ephambili ngaphambi kokuntywila ukomelela okongeziweyo kunye nokuxhathisa ukothuka kwe-thermal ngaphezulu kweeseramikhi ze-alumina zemveli.; ngaphezu koko iqhayisa ngobulukhuni obuphezulu, amandla okuguquguquka, kunye nokuxinana kunomlingani wayo.
Indlela yokuqina ye-ZTA ibandakanya inguqu yesigaba esinyanzelwa kukucinezeleka ukusuka kwi-tetragonal ukuya kwi-monoclinic zirconia crystal structures, ukwandisa ukuqina kokwaphuka ngelixa uyikhusela kumothuko we-thermal kunye nokulimala komatshini. I-zirconia eqinile i-alumina ihambelana kakhulu ne-biocompatible kwaye ayidli ngokukhawuleza, iyenza ilungele ukutywinwa kwevalvu. Ngaphaya koko, amandla ayo aphezulu e-flexural ivumela ukuba imelane noxinzelelo lomzimba ngokufanelekileyo.