Fabrication of nanostructure Al2O3/ZrO2 (Y2O3) eutectic by combustion synthesis melt-casting under ultra-high gravity

Fabrication of nanostructure Al2O3/ZrO2 (Y2O3) eutectic by combustion synthesis melt-casting under ultra-high gravity
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超重力燃烧合成熔铸法制备纳米结构Al2O3/ZrO2(Y2O3)共晶

DOI:
10.1016/j.matlet.2009.10.008
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发表时间:
2010-01
期刊:
影响因子:
3
通讯作者:
Chen, Kexin
Chen, Kexin
中科院分区:
材料科学3区
文献类型:
--
作者:
Mei, Lin;Mai, Peilin;Li, Jiangtao;Chen, Kexin

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采用燃烧合成和超重力熔融铸造相结合的方法制备了Al2O3/ZrO2(Y2O3)共晶材料。当UHG=800g时,合金相对密度高达99.8%,并沿UHG方向取向生长。微观结构由排列生长区组成,其中包含有序的zro2棒在al2o3基体中的三角形分散,间距为300nm。共晶具有较高的断裂韧性,断裂韧性可达17.9MPa·m1/2,这主要归因于纳米结构和zro2棒的弹性桥接效应。
A novel method for preparing Al2O3/ZrO2(Y2O3) eutectic was developed by combining combustion synthesis with melt-casting under ultra-high gravity (CSMC-UHG). The application of UHG=800g resulted in a high relative density of 99.8%, and an orientation-growth along the UHG direction. The microstructure was composed of aligned growth regimes containing a triangular dispersion of orderly ZrO2rods in Al2O3matrix with a spacing of 300nm. The eutectic had a high fracture toughness up to 17.9MPa·m1/2, which was mainly attributed to the nanostructure and the elastic bridge effects of the aligned ZrO2rods.
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