The carbon felt was densified to 1.58 g/cm3 with multi-factor coupling fields CVI,and then it was impregnated with resin/carbonized to 1.85 g/cm3 to make the low cost C/C composites.

• 利用多元耦合场CVI工艺将炭毡增密至1.；58 g/cm3；再进行树脂浸渍/炭化增密至1