摘要
用旋转ＣＶＩ工艺，通过优化工艺参数，在低压（５ｋＰａ）、高温（１１００℃）、高Ｃ３Ｈ６ 浓度（６２．５ｖｏｌ％ ）以及３．５ｍ ｍ ·ｍ ｉｎ－ １ 碳布旋转线速度条件下，在二维碳布上快速制备了厚度均匀（０．２５μｍ ）、表面规整的致密热解碳界面层。实验结果表明：沉积温度对界面层表面状况有较大的影响；采用减压法与优化沉积炉结构与几何尺寸，能有效防止高温高Ｃ３Ｈ６ 浓度下炭黑的形成。
Dense pyrolytic carbon interface coating with uniform thickness and regular surface was fabricated using rotating chemical vapor infiltration (RCVI) process on 2 D carbon cloth within optimal parameters, that is, low pressure (5kPa), high temperature (1100℃), high propylene concentration (62.5 vol%) and 3.5 mm·min -1 rotational linear velocity. The results in this paper show that there are more important effect of deposition temperature on the properties of coating surface, and low pressure, optimization of geometric construct of deposition furnace are valid for preventing forming soot from pyrolytic carbon deposition process on conditions of high temperature and high propylene concentration.
出处
《航空材料学报》
EI
CAS
CSCD
1999年第4期27-31,共5页
Journal of Aeronautical Materials
基金
国家自然科学基金!(59772031)
关键词
旋转CVI
陶瓷基复合材料
热解碳
界面层
炭黑
rotating CVI
ceramic matrix composites
pyrolytic carbon
interface coating
soot
