Ablation and mechanical properties of 3D braided C/ZrC-SiC composites with various SiC/ZrC ratios

作者：Yan, Chunlei; Liu, Rongjun^*; Zhang, Changrui; Cao, Yingbin

来源：Ceramics International, 2016, 42(16): 19019-19026.

DOI：10.1016/j.ceramint.2016.09.058

• C/ZrC-SiC
• SiC/ZrC ratio
• Mechanical property
• Ablation property

Three-dimensional (3D) braided C/ZrC-SiC composites with various SiC/ZrC ratios were fabricated by precursor infiltration and pyrolysis (PIP) process. The effects of SiC/ZrC ratios on the ablation and mechanical properties were investigated systematically. The flexural strength of 3D C/ZrC-SiC grows with the increase of SiC/ZrC ratios. The compact and stiff ZrC-SiC matrix, moreover, the carbon fiber and PyC interphase with the less reaction damage account for the improved flexural strength of C/ZrC-SiC with higher SiC/ZrC ratios. As for the ablation properties, both mass and linear ablation rates drop with the decrease of SiC/ZrC ratios at the beginning. However, the ablation rates start to increase with the further decrease of SiC/ZrC ratio, where the high open porosity deteriorates the ablation properties. Herein, in order to obtain a balance between ablation and mechanical properties, an appropriate SiC/ZrC ratio should be considered.

• 出版日期2016-12
• 单位中国人民解放军国防科学技术大学