| 氮化硼/硅橡胶可瓷化复合材料的制备及性能研究 |
| Preparation and Properties of Boron Nitride/Silicone Rubber Ceramic Composites |
| 投稿时间：2019-07-12 修订日期：2019-07-12 |
| DOI：10.12136/j.issn.1000-890X.2020.03.0163 |
| 中文关键词: 氮化硼 硅橡胶 可瓷化复合材料 陶瓷化 弯曲强度 热稳定性能 |
| 英文关键词: boron nitride silicone rubber ceramizable composite ceramization bending strength thermal stability |
| 基金项目:中央高校基本科研业务费专项资金资助项目（195201020） |
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| 中文摘要: |
| 以硅橡胶为基体材料、氮化硼为成瓷填料、短切碳纤维为补强填料，制备出硅橡胶可瓷化复合材料，研究氮化硼用量对硅橡胶可瓷化复合材料性能的影响。结果表明：随着氮化硼用量的增大，硅橡胶可瓷化复合材料的物理性能提高，当氮化硼用量为20份时，复合材料的拉伸强度和拉断伸长率均达到最大值；复合材料高温热解产物的弯曲强度随着氮化硼用量的增大而逐渐增大；复合材料中氮化硼的X射线衍射峰强度随其用量的增大而逐渐增强；当氮化硼用量为40份时，高温热解产物表面形成了坚硬、致密的陶瓷层，能够有效地阻止热量传递。 |
| 英文摘要: |
| The ceramizable silicone rubber composites were prepared by taking silicone rubber as the matrix，boron nitride as the ceramic filler，and chopped carbon fiber as the reinforcing material. The effects of boron nitride content on the properties of the ceramizable silicone rubber composites were investigated. The results showed that the physical properties of the composites increased as the additional level of boron nitride increased. When the additional level of boron nitride was 20 phr，the tensile strength and elongation at break of the composites reached the maximum. The bending strength of the high-temperature pyrolysis products of the composites gradually increased as the additional level of boron nitride increased. The intensity of XRD diffraction peaks of boron nitride in the composites gradually increased by increasing the additional level of boron nitride. When the additional level of boron nitride was 40 phr，a hard and dense ceramic layer was formed on the surface of the pyrolysis product，which could effectively prevent heat transfer. |
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