利用凝胶注模成型工艺,在固定单体交联荆总质量的情况下,改变单体与交联剂的质量比例,制备出不同单体与交联剂比例的多孔氮化硅陶瓷.借助扫描电子显微镜、Archimedes法和三点弯曲法等方法研究了单体与交联剂比例对多孔氮化硅陶瓷的微观结构和基本力学性能的影响.结果表明,随着单体与交联剂比例的增大,试样的干燥收缩率增大;当单体与交联剂比例≥15时,试样排胶后出现开裂现象;当单体与交联剂比例<15时,随着单体与交联剂比例增大,烧成后的试样强度呈增大的趋势.
By using gel-casting process, porous silicon nitride ceramics of different ratios between monomer and cross-linker were prepared under the condition of a fixed total amount but different proportion of monomer and crosslinking agent. The effects of different proportion of monomer and cross-linking agent on the microstructure and mechanical properties of porous silicon nitride were studied by means of the scanning electron microscopy ( SEM), archimedes method and three-point bending method. The results showed that the drying shrinkage of specimens increased as the proportion of monomer and cross-linking agent increased, the specimens cracked after binders burning when the proportion of monomer and cross-linking agent was above or equal 15. However, those sintering specimens with proportions of monomer and cross-linking agent below 15 displayed a rising trend of strength as the proportion increased.
参考文献
| [1] | 张雯,王红洁,张勇,金志浩.凝胶注模成型制备纳米复合多孔氮化硅陶瓷[J].复合材料学报,2004(05):83-87. |
| [2] | 朱小龙,苏雪筠.多孔陶瓷材料[J].中国陶瓷,2000(04):36-39. |
| [3] | Saggio W;Scott J;Minnear W P .Processing of porous ceramics[J].Journal of the American Ceramic Society,1992,71(11):1674-1 682. |
| [4] | Ishizaki K;Komarneni S;Nanko M.Porous materials[M].Dordrecht,Boston:Kluwer Academic Publisher,1998:181-198. |
| [5] | 杨金龙,戴春雷,马天,马利国,黄勇.高可靠性陶瓷部件胶态注射成型关键技术及装备[J].中国有色金属学报,2004(z1):243-249. |
| [6] | 王亚利,郝俊杰,郭志猛.凝胶注模成型生坯强度影响因素的研究[J].材料科学与工程学报,2007(02):262-264. |
| [7] | Juanli Yu;Hongjie Wang;Hong Zeng.Effect of monomer content on physical properties of silicon nitride ceramic green body prepared by geleasting[J].Ceramics International,2009(35):1 039-1 044. |
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