摘要
通过添加物理发泡剂和助熔剂首次制得可陶瓷化的硅橡胶泡沫复合材料,并对其结构、性能以及物相变化进行了研究。结果表明,助熔剂的加入降低了硅橡胶的分解温度,且热处理后材料的质量残留率随着助熔剂用量的增加而升高;复合材料在1 000℃下能形成完整的陶瓷骨架结构,且保持了良好的泡孔形貌,材料的压缩强度最佳;当温度高于1 000℃时,材料的压缩强度有所降低,此时材料分解产生了二氧化硅,同时体系中有硅酸镁生成。此种可瓷化硅橡胶泡沫材料不仅对硅橡胶泡沫在极端条件下的应用做出探索,也对可瓷化复合材料的轻量化研究具有重要意义。
Ceramizable silicone rubber foam composites were first made by adding physical foaming agents and fluxing agents,and its structure,properties and phase changes were studied.The result shows that the addition of fluxing agent has reduced the decomposition temperature of silicone rubber,and the mass residue of the material after heat treatment has been increased.The material has formed a complete ceramic skeleton structure in 1 000 ℃,at that time the material has the best compressive strength.When the temperature is above 1 000 ℃,the compressive strength of the material decreased,at that time the material decomposed and produced silica,at the same time the system has the formation of magnesium silicate.The study on ceramizable silicone rubber foam composite is an exploration on application of silicone rubber foam under extreme conditions.Also it is very important to the study on lightweight ceramizable composites.
作者
陈浩昌
付忠奎
刘灵珊
钟亦友
秦岩
CHEN Haochang;FU Zhongkui;LIU Lingshan;ZHONG Yiyou;QIN Yan(School of Material Science and Technology,Wuhan University of Technology,Wuhan 430070,Chin)
出处
《弹性体》
CAS
2018年第4期16-21,共6页
China Elastomerics
关键词
硅橡胶
泡沫材料
可瓷化
微观结构
silicone rubber；foam material；ceramization；mircostructure
