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Journal of the Korean Ceramic Society 1996;33(7): 779. |
| 반응소결에 의한 지르코니아-스피넬 복합체의 제조 및 성질 |
| 황규홍, 김상모 |
| 경상대학교 무기재료공학과 /첨단소재연구소 |
| The Fabrication and Their Properties of Zirconia-spinel COmposites by Reaction Sintering |
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| ABSTRACT |
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The spinel/cubic stabilized zirconia composites were fabricated via, The reaction sintering of monoclinic zirco-nia(baddeleyite) added with MgAl powder. During heating Mg and Al were oxidizedfirst and subsequently the oxides formed spinel (MgAl2O4) and finally remained MgO stabilized the zirconia, Because the oxides formed during the oxidation process would have very fine grain size (order of submicron) mainly due to the effects of attrition milling the reaction sintering was more effective in densification and improvement of strength and fracture toughness than conventional sintering with direct addition of MgO. The sintering behavior phase transformation during firing and mechanical properties of sintered body were investigated with emphasis on the relations between spinel formation due to MgAl addition and sintering and mechanical properties. |
| Key words:
$ZrO_2, Zirconia-spinel composites, Baddeleyite, MaAl, $K_{IC}$ |
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