摘要
以一种含分散的纳米氧化锆的沥青作为黏结剂或浸渍剂,通过热压和浸渍工艺制备出含锆石墨和碳/碳复合材料。采用扫描电镜对样品中锆的分散状况进行了表征。结果表明:锆元素是以1μm左右的颗粒均匀分散在含锆石墨和碳/碳复合材料中。含锆石墨和碳/碳复合材料在氧-乙炔烧蚀试验中,由于锆的存在使不同种类碳之间的烧蚀趋于一致,材料表面烧蚀更加均匀。
In order to improve the distribution uniformity of zirconium in carbon based composites, a precursor of pitch containing nano-zirconium is applied as an impregnant. Graphite and C/C composites with nano- zirconium compounds are produced by using a precursor as a major raw material. It is shown by a SEM observation that particles of zirconium compounds with a diameter of about 1μm evenly disperse in the composites. Ablation tests of the composites are carried out under an oxyacetylene flame. The results show that ablation rates of different kinds of materials tend to be identical.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2007年第1期23-27,共5页
Aerospace Materials & Technology
基金
先进功能复合材料技术国防科技重点实验室基金资助(51469010104HT7301)
关键词
碳/碳复合材料
微观结构
锆
烧蚀
Carbon/Carbon composites, Microstructures, Zirconium, Ablation
