Fiber-Matrix Compatibility in an All-Oxide Ceramic Composite with RBAO Matrix
Fiber-Matrix Compatibility in an All-Oxide Ceramic Composite with RBAO Matrix
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DOI：
10.1111/j.1551-2916.2011.04863.x
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发表时间：
2012
影响因子：
3.9
通讯作者：
S. Goushegir;P. Guglielmi;João Ponte da Silva;M. Hablitzel;D. Hotza;H. Al-Qureshi;R. Janssen
中科院分区：
文献类型：
--
作者：
S. Goushegir;P. Guglielmi;João Ponte da Silva;M. Hablitzel;D. Hotza;H. Al-Qureshi;R. Janssen
在本研究中，纤维基体的兼容性在全氧化物陶瓷复合材料进行了检查。反应结合氧化铝被用作多孔基质，以确保与纤维的弱界面。由于多孔基质在实现损伤容限方面的有效性，基质裂纹在高达1300°C的烧结温度下围绕界面偏转。在1300°C以上，基体的致密化导致样品的脆性断裂，其中基体裂纹穿过纤维。断裂表面的观察证实了高达1300°C加工温度下的纤维拔出现象。著名的他和哈钦森裂纹偏转准则被用来预测脱粘行为在纤维基体界面作为基体孔隙率的函数。此外，Nextel™ 610氧化铝纤维的微结构演变的评估显示在高于1300°C的烧结温度下显著的晶粒粗化。老化100 h的复合材料试样的裂纹偏转行为和纤维微观结构的变化也被提出。
In the present study, fiber-matrix compatibility in an all-oxide ceramic composite is examined. Reaction-bonding aluminum oxide is used as porous matrix to ensure weak interfaces with fibers. Matrix cracks have been deflected around the interface for sintering temperatures up to 1300°C, due to the effectiveness of porous matrix in enabling damage tolerance. Above 1300°C, densification of the matrix resulted in brittle fracture of the samples, with matrix cracks going through the fibers. Observation of fracture surfaces confirmed the fiber pull-out phenomenon up to processing temperatures of 1300°C. The well-known He and Hutchinson criteria for crack deflection was used to predict debonding behavior at the fiber-matrix interface as a function of matrix porosity. Furthermore, evaluation of the microstructure evolution of Nextel™ 610 alumina fibers showed a pronounced grain coarsening at sintering temperatures above 1300°C. Changes in crack deflection behavior and fiber microstructure of a composite sample aged for 100 h are also presented.