摘要
以聚硅氧烷为先驱体，采用先驱体转化法及有机泡沫浸渍法相结合制备了SiOC泡沫陶瓷。研究了纳米SiC填料含量对SiOC泡沫陶瓷的抗压强度、孔隙率的影响，并对泡沫陶瓷的微观形貌进行了分析。结果表明：随着纳米SiC填料含量的增加，Si0C泡沫陶瓷抗压强度先升高后降低；在相同的裂解温度下，添加纳米SiC填料可提高泡沫陶瓷的孔隙率。当SiC填料含量达5％时泡沫陶瓷抗压强度达最大值17．8MPa，其孔隙率为88％。微观结构分析显示，SiOC泡沫陶瓷呈三维网状结构，孔径为100～500μm，具有良好的贯通性，且孔筋处结构较为均匀致密。
The SiOC foam ceramics were prepared through precurcor （polysiloxane）, pyrolysis organic foam infiltration. The effect of the content of SiC nano-filler on the compression strength and porosity of foam ceramics was studied, and the microstructure of the SiOC foam ceramics was analyzed as well. The results show that with increasing the content of SiC nano-filler the compression strength increases and then decreases. At the same pyrolysis temperature, the addition of SiC nano-filler can increase the porosity of foam ceramic. When the content of SiC nano-fiUer is 5%, the compression strength is the biggest, which can reach 17.8 MPa, and the porosity is 88%. Microstructure reveals that the foam ceramics have an open, uniform and interconnected porous structure with a pore size of 100-500 μm and the strut of foam ceramics is uniform and dense.
出处
《铸造技术》
CAS
北大核心
2008年第5期597-600,共4页
Foundry Technology
基金
黑龙江省教育厅科学技术研究项目资助(11511382)
黑龙江省普通高等学校青年学术骨干支持计划项目资助(1151G049)
黑龙江省自然科学基金项目资助(E2007-23)
