| 孔英杰,于新民,裴雨辰.熔渗温度和时间对 C/C-SiC-ZrC 复合材料性能的影响研究[J].装备环境工程,2016,13(3):88-92. KONG Ying-jie,YU Xin-min,PEI Yu-chen.Effects of Infiltration Temperature and Time on the Properties of C/C-SiC-ZrC Composites Fabricated by RMI[J].Equipment Environmental Engineering,2016,13(3):88-92. |
| 熔渗温度和时间对 C/C-SiC-ZrC 复合材料性能的影响研究 |
| Effects of Infiltration Temperature and Time on the Properties of C/C-SiC-ZrC Composites Fabricated by RMI |
| 投稿时间：2016-02-03 修订日期：2016-06-15 |
| DOI：10.7643/ issn.1672-9242.2016.03.014 |
| 中文关键词: 反应熔渗法（RMI） C/C-SiC-ZrC 弯曲性能 |
| 英文关键词:reactive melt infiltration (RMI) C/C-SiC-ZrC flexural strength |
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| 中文摘要: |
| 目的 研究熔渗温度和熔渗时间对复合材料密度和弯曲性能的影响。 方法 采用化学气相渗透法（CVI）和聚合物浸渍裂解法（PIP）制备熔渗用低密度 C/C 复合材料，以 Si0.9-Zr0.1 合金为熔渗金属，采用反应熔渗法（RMI）制备 C/C-SiC-ZrC 复合材料。测试 C/C-SiC-ZrC 复合材料的开孔率、密度、弯曲强度，分析试样的相组成。 结果 熔渗温度为 1450 ℃时，复合材料的密度仅有 1.97 g/cm3，弯曲强度仅为 153 MPa；当熔渗温度升高到 1550 ℃时，密度和弯曲强度分别升高到 2.39 g/cm3 和 260 MPa；而当熔渗温度升高到 1650 ℃时，密度和弯曲强度又分别降为 2.18 g/cm3 和 208 MPa。 1.5 h 熔渗时复合材料的密度值最大，为 2.46 g/cm3，相对 0.5 h 熔渗的最小值提高了 5.1%； 1.0 h 熔渗时复合材料材料的弯曲强度最高，达到了 260 MPa，相对于 1.5 h 熔渗的最低值仅提高了 3.2%。 结论 复合材料的致密度和弯曲强度随熔渗温度的升高先升高后降低，密度随熔渗时间的延长而增大，而弯曲强度随熔渗时间的延长先升高后降低，但密度和弯曲强度随熔渗时间的延长变化较小。 |
| 英文摘要: |
| Objective To investigate the effects of infiltration temperature and infiltration time on the density and flexural strength of C/C-SiC-ZrC composite. Methods Carbon fiber felt was firstly infiltrated by Chemical Vapor Infiltration (CVI) combined with Precursor Infiltration Pyrolysis (PIP) to obtain the porour C/C perform, and then Carbon fiber reinforced carbon-silicon carbide-zirconium carbide (C/C-SiC-ZrC) composites were prepared by Reactive Melt Infiltration (RMI) with Si0.9-Zr0.1 alloy. The opening rate, density and flexural strength of C/C-SiC-ZrC composite were tested. Results The density of C/C-SiC-ZrC composite was only 1.97 g/cm3, and the flexural strength was only 153 MPa with the infiltration temperature of 1450 ℃. While the infiltration temperature rose to 1550 ℃, the density and flexural strength increased respectively to 2.39 g/cm3 and 260 MPa. With the infiltration temperature further rose to 1650 ℃, the density and flexural strength decreased respectively to 2.18 g/cm3 and 208 MPa. When the infiltration time was 1.5 hours, the density of 2.46 g/cm3 was the highest, increased by 5.1% than the density with the infiltration time of 0.5 hour. While the infiltration time was 1.0 hour, the highest flexural strength was 260 MPa, increased by only 3.1% than the flexural strength with the infiltration time of 1.5 hours. Conclusion The density and flexural strength of C/C-SiC-ZrC composites increased firstly and then decreased with the increase of infiltration temperature. With the increase of infiltration time, the density of C/C-SiC-ZrC composites increased, but the flexural strength increased firstly and then decreased. The influence of infiltration time was relatively small. |
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