| 先驱体转化-热压烧结Cf/SiC复合材料的緻密化机理 |
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| 引用本文： | 何新波,杨辉,张长瑞,周新贵. 先驱体转化-热压烧结Cf/SiC复合材料的緻密化机理[J]. 材料科学与工程学报, 2002, 20(3): 358-360,370 |
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| 作者姓名： | 何新波 杨辉 张长瑞 周新贵 |
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| 作者单位： | 1. 浙江大学材料科学与工程系,杭州,310027
2. 国防科技大学先进陶瓷纤维及其复合材料重点实验室,长沙,410073 |
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| 摘 要： | 本文采用先驱体裂解-热压烧结方法制备出了Cf/SiC复合材料,并重点研究了复合材料的致密化过程.结果表明,复合材料主要是通过液相烧结而得到致密化的.由于复合材料中聚碳硅烷(PCS)的裂解不仅有利于烧结液相的形成,而且形成了大量的纳米级SiC颗粒,因此,复合材料能够在较低烧结温度下得到较好的致密化,从而使复合材料具有较好的力学性能.
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| 关 键 词： | Cf/SiC复合材料 先驱体转化-热压烧结 致密化 |
| 文章编号： | 1004-793X(2002)03-0358-03 |
| 修稿时间： | 2001-10-28 |
Densification Mechanism of Cf/SiC Composites prepared by Precursor Pyrolysis and Hot Pressing |
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| HE Xin bo ,YANG Hui ,ZHANG Chang rui ,ZHOU Xin gui. Densification Mechanism of Cf/SiC Composites prepared by Precursor Pyrolysis and Hot Pressing[J]. Journal of Materials Science and Engineering, 2002, 20(3): 358-360,370 |
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| Authors: | HE Xin bo YANG Hui ZHANG Chang rui ZHOU Xin gui |
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| Affiliation: | HE Xin bo 1,YANG Hui 1,ZHANG Chang rui 2,ZHOU Xin gui 2 |
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| Abstract: | In this paper,the densification mechanism of C f/SiC,prepared by precursor Pyrolysis and Hot pressing,was investigated.The results indicated that the composites were densified primarily through liquid phase sintering.Because the pyrodlysis of polycarbosilane(PCS)was beneficial to the formation of sintering aiding liquid phase and led to the formation of a lot of nano SiC particles,the composites could be well densifed at lower processing temperature.Consequently,the composites exhibited better mechanical properties. |
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| Keywords: | C f/SiC composites precursor pyrolysis and hot pressing densification. |
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