Al2O3/ZrO2 (Y2O3) self-growing composites prepared by combustion synthesis under high gravity

Al2O3/ZrO2 (Y2O3) self-growing composites prepared by combustion synthesis under high gravity
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超重力燃烧合成制备Al2O3/ZrO2(Y2O3)自生长复合材料

DOI:
10.1016/j.scriptamat.2007.09.051
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发表时间:
2008-02
期刊:
影响因子:
6
通讯作者:
王卫国
王卫国
中科院分区:
材料科学1区
文献类型:
--
作者:
赵忠民;张龙;宋义刚;王卫国

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在超重力条件下(> 200 g)采用燃烧合成法制备了Al_2O_3/ZrO_2(Y_2O_3)陶瓷片,陶瓷片由纳米-亚微米t-ZrO_2纤维组成的三角形无序排列的团簇组成,团簇间由微米级t-ZrO_2球形晶粒包围。陶瓷的高强度(接近1.6GPa)归因于小尺寸缺陷和高断裂韧性(接近15.0MPam 1/2),这取决于强烈的耦合增韧机制。
Al2O3/ZrO2(Y2O3) plates were prepared by combustion synthesis under high gravity (>200g) and the ceramics were composed of randomly orientated colonies containing a triangular dispersion of orderly nano-submicrometer t-ZrO2fibers, surrounded by inter-colony regions containing micrometer size t-ZrO2spherical grains. The high strength (close to 1.6GPa) of the ceramics was attributed to small-size defect and high fracture toughness (close to 15.0MPam1/2) dependent on an intensive coupled toughening mechanism.
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