为提高尖晶石碳质材料的抗热震性和抗冲刷性，以尖晶石、石墨和不同种类添加剂（铝－硅合金、硅粉、B4 C、SiC）为原料，热塑性酚醛树脂为结合剂，在氮气保护下经950℃热处理后，制备了石墨含量为8％（w）的尖晶石碳质材料，探究了添加剂对尖晶石碳材料力学性能、抗热震性和抗氧化性的影响。结果表明：1）铝－硅合金或 B4 C 能明显提高尖晶石碳材料的常温抗折强度，但会降低材料的抗热震性，B4 C 对材料的抗热震性最不利，硅粉和 SiC 对常温抗折强度影响不大，但能显著提高抗热震性；2）铝－硅合金或硅粉能显著提高材料的高温抗折强度，B4 C 或 SiC 对高温强度影响不大。3）经950℃热处理后，B4 C 对提高材料的抗氧化性作用不明显，单独加入硅粉、铝－硅合金和 B4 C 复合添加均能提高抗氧化性能。
In order to improve the thermal shock resistance and erosion resistance of spinel carbon materi-als,the spinel carbon specimens with 8 mass% flake graphite were prepared using spinel,graphite and additives (Al-Si alloy,silicon powder,B4 C,and SiC,respectively)as starting materials,and thermoplastic phenolic resin as a binder,hot treating at 950 ℃ under the protection of nitrogen.Effects of additives on the mechanical properties,thermal shock resistance and oxidation resistance of spinel carbon materials were investigated.The results show that:(1)Al-Si alloy or B4 C can significantly improve the CMOR of the speci-mens,but decrease the thermal shock resistance.B4 C is the worst for the thermal shock resistance,silicon powder and SiC have unobvious effect on CMOR,but they can obviously enhance the thermal shock resist-ance;(2)Al-Si alloy or silicon powder can significantly improve the HMOR of the specimens,B4 C or SiC has little effect on hot strength;(3)after hot treated at 950 ℃,B4 C has unobvious effect on oxidation resist-ance,adding silicon powder or (Al-Si alloy +B4 C)can improve the oxidation resistance.
参考文献
| [1] | 张勤学 .添加剂对铝碳质长水口性能的影响[D].西安建筑科技大学,2003. |
| [2] | 武建芳 .改性石墨及添加物对低碳镁碳材料结构与性能的影响[D].武汉科技大学,2012. |
| [3] | 张喜荃;宋相宏.添加剂在含碳耐火材料中的热力学行为[J].承钢技术,2007(1):28-30. |
| [4] | 岳卫东;聂洪波;钟香崇;石凯.金属Al-Si复合不烧铝碳滑板材料的热机械性能及显微结构[J].耐火材料,2006(3):177-180. |
| [5] | 蒋海云;王继刚;段志超;李凡.碳化硼改性酚醛树脂的高温结构演变特性[J].材料研究学报,2006(2):203-207. |
| [6] | 孙勇,于景坤.B4C、SiC添加剂对铝碳耐火材料性能的影响[C].耐火材料--第五届国际耐火材料学术会议论文集,2007:156-158. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%