Development of a slurry injection technique for continuous fibre ultra-high temperature ceramic matrix composites
Development of a slurry injection technique for continuous fibre ultra-high temperature ceramic matrix composites
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DOI：
10.1016/j.jeurceramsoc.2019.05.070
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发表时间：
2019-11
影响因子：
5.7
通讯作者：
B. Baker;V. Rubio;P. Ramanujam;J. Binner;Amjad Hussain;T. Ackerman;P. Brown;I. Dautremont
中科院分区：
文献类型：
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作者：
B. Baker;V. Rubio;P. Ramanujam;J. Binner;Amjad Hussain;T. Ackerman;P. Brown;I. Dautremont
提出了一种简单有效的浆料注射成型方法，可从高纤维密度预制体制备致密、均匀的超高密度陶瓷基复合材料。由于该方法基于浆料注射，因此均匀性不限于小的预制件尺寸;理论上可以生产任何尺寸和形状的高纤维体积的致密部件。通过这种方法生产的样品表现出高和一致的密度，与传统的真空浸渍相比，注射方法获得的密度平均高27%，低87%的变化。断层扫描表明，没有偏见的陶瓷粉末分布的样品由注射，而真空浸渍单独生产的样品显示差的粉末渗透到大样品的中心。与真空浸渍相比，新方法产生的复合材料强度更高和/或强度更一致。热烧蚀测试表明，通过这种途径生产的材料的保护能力有显着改善。
A simple and effective slurry injection method for producing dense and uniform ultra-high ceramic matrix composites from preforms of high fibre density was developed. As this method is based on slurry injection the homogeneity is not constrained to small preform sizes; dense components of high fibre volume can be produced in theoretically any size and shape. Samples produced by this method demonstrated high and consistent densities, with the injection method obtaining densities an average 27% higher and 87% lower in variability when compared to conventional vacuum impregnation. Tomography demonstrated no bias in the ceramic powder distribution for samples produced by injection, whereas samples produced by vacuum impregnation alone displayed poor powder penetration to the centre of large samples. The new approach yielded composites that were as strong and/or more consistent in strength compared to vacuum impregnation. Thermo-ablative testing demonstrated significant improvements in protective capability for materials produced by this route.