| Mechanical Behaviors of ZrO2-Al2O3 Ceramic Composites with Y2O3 as Stabilizer |
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| 引用本文： | 丘泰,王玉春,沈春英. Mechanical Behaviors of ZrO2-Al2O3 Ceramic Composites with Y2O3 as Stabilizer[J]. 中国稀土学报(英文版), 2005, 23(3): 280-284 |
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| 作者姓名： | 丘泰 王玉春 沈春英 |
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| 作者单位： | College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China，College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China，College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China |
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| 基金项目： | theHighTechnologyDevelopmentProgrammeofJiangsuProvince (BG2 0 0 2 0 2 2 5 ) |
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| 摘 要： | Forlongthebrittlenessofceramicmaterialshasstoodinthewayofindustrialapplicationanddevelop ment.However ,inrecentyears ,suchprogressasthephasetransformationtougheningofzirconia ,thedis persionofparticletougheningandthefiberorwhiskertougheninghavewellimprove…
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| 关 键 词： | 无机非金属材料 陶瓷 锌 铝 稳定设备 稀土 |
Mechanical Behaviors of ZrO2-Al2O3 Ceramic Composites with Y2O3 as Stabilizer |
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| QIU Tai,WANG Yuchun,Shen Chun. Mechanical Behaviors of ZrO2-Al2O3 Ceramic Composites with Y2O3 as Stabilizer[J]. Journal of Rare Earths, 2005, 23(3): 280-284 |
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| Authors: | QIU Tai WANG Yuchun Shen Chun |
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| Abstract: | The ZrO2-Al2O3 ceramic composites were prepared by appropriate techniques with commercial ZrO2 and Al2O3 powders as raw materials and Y2O3 as stabilizer. The results indicate that with the introduction of Al2O3 into the ZrO2 matrix where the quantity of additive Y2O3 is 3.5% (mole fraction), the growth of ZrO2 grains is efficiently inhibited, which helps the ZrO2 grains exist in a metastable tetragonal manner; thus higher strength and toughness are acquired. When the content of alumina is 20% (mass fraction), the bending strength and fracture toughness of the composites are 676.7 MPa and 10 MPa·m1/2 respectively, the mechanical behaviors are close to those prepared with ZrO2 and Al2O3 powders synthesized through wet chemical approach. The mechanical behaviors of the composites are well improved owing to the dispersion toughening of alumina grains and phase transformation toughening of zirconia grains. |
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| Keywords: | inorganic non-metallic materials zirconia-alumina ceramic composites yttria stabilizer mechanical behaviors toughening mechanism rare earths |
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