摘要
考察了预制体几何形状在高频辅助化学液气相沉积 (CLVD)工艺中的作用。相同高度、不同直径的预制体存在一个最佳直径 ,形成由内向外的致密化模式 ,由此获得的碳 /碳复合材料表观密度最大 ,开孔隙率最小。相同直径 ,不同高度的预制体中 ,随着预制体高度减小 ,其致密化模式先由中心向两端 ,而后由内向外 ,最后由外向内。h=70 mm的材料表观密度最高 。
By studying the densification process of the same height, different diameter and the same diameter , different height preforms, we examined the effects of preform geometry on radio frequency assisted chemical liquid vapor deposition(CLVD) of carbon preforms. There is an optimal diameter among the same height, different diameter preforms. The deposition pattern of this diameter preform is from inside to outside. The carbon/carbon composite made by this preform has the highest density and the smallest open porosity. As the height decreased, the deposition pattern is first from the center to the two sides, then from inside to outside, finally from outside to inside. The apparent density of the h =70mm sample is the highest, and the open porosity of it is the smallest.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第4期389-392,共4页
Journal of East China University of Science and Technology
