ZrO2 fiber-matrix interfaces in alumina fiber-reinforced model composites
ZrO2 fiber-matrix interfaces in alumina fiber-reinforced model composites
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DOI：
10.1016/j.jeurceramsoc.2014.10.027
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发表时间：
2015-05-01
影响因子：
5.7
通讯作者：
Janssen, Rolf
中科院分区：
文献类型：
--
作者：
Blaese, Diego;Garcia, Daniel E.;Janssen, Rolf
采用氧化铝纤维和致密氧化铝基体模型复合材料，研究了单斜ZrO 2包覆氧化铝纤维增强复合材料中纤维/基体界面的性能。纤维-基体多孔界面是通过在单斜氧化锆悬浮液中浸涂单纤维而产生的，为了改变涂层的孔隙率，使用了两种不同的颗粒尺寸。通过纤维推入试验确定界面滑动应力;从通过维氏压痕和通过断裂表面产生的裂纹分析裂纹偏转行为。采用He和哈钦森模型评估了界面、基体和纤维的断裂韧性和弹性模量，并用于预测裂纹偏转行为。结果表明，单斜氧化锆界面是适用于致密氧化铝复合材料，由于低纤维/界面的化学相互作用。通过浸涂可以产生均匀的涂层，并使用不同的单斜氧化锆颗粒尺寸进行定制。用推入试验获得的滑动应力值约为120 MPa。(C)2014爱思唯尔有限公司版权所有。
Properties of the fiber/matrix interface in monoclinic ZrO2-coated alumina fiber-reinforced composites were investigated using model composites with dense alumina matrix and single alumina fibers. The fiber-matrix porous interface was produced via dip-coating single fibers in monoclinic ZrO2 suspensions and two different particle sizes were used in order to vary the coating porosity. The interfacial sliding stress was determined via fiber pushin test; crack deflection behavior was analyzed from cracks created via Vickers indentation and via fracture surface. Fracture toughness and elastic modulus of interface, matrix and fibers were evaluated and used to predict the crack deflection behavior using the model of He and Hutchinson. Results showed that monoclinic zirconia interfaces are suitable for dense alumina composites, due to the low fiber/interface chemical interaction. A uniform coating can be produced via dip coating and tailored with using different monoclinic zirconia particle sizes. The sliding stress values obtained with the pushin test were about 120 MPa. (C) 2014 Elsevier Ltd. All rights reserved.