摘要
提出了一种制备连续碳纤维编织预制体增强碳化硅复合材料的快速成型技术“均热法化学气相渗透法（ＩＣＶＩ）＋浸渍裂解法”混合基体致密化工艺技术。研究表明，ＩＣＶＩ沉积温度、反应气体浓度及配比、浸渍剂配方对复合材料的微结构、性能以及制备周期影响很大，采用优化工艺条件，可快速制备出高性能的Ｃ／ＳｉＣ复合材料，其弯曲强度和剪切强度分别达到６４３ＭＰａ和６３．７ＭＰａ，断裂韧性达１７．９ＭＰａ·ｍ１／２。
A new mixed quick processing of isothermal chemical vapor infiltration(ICVI) and polymer precursor pyrolysis (PPP), has been introduced to fabricate continuous carbon fibers braided preforms reinforced silicon carbide composites.Test results indicated that processing conditions of depositing temperature,H 2/MTS mole rate, and impregnant formula ,have a significant influence on microstructure and properties and operating cycle of the composites . The composites fabricated by the optimized processing have a short produce cycle and improved properties of density of more than 2.0 g/cm 3,flexural strength of 643 MPa,sheer strength of 63.7 MPa and fracture toughness of 17.9 MPa·m 1/2 .
出处
《宇航材料工艺》
CAS
CSCD
北大核心
1999年第3期38-41,45,共5页
Aerospace Materials & Technology
关键词
浸渍/裂解
碳/碳化硅基
复合材料
快速成型
Isothermal chemical vapor infiltration (ICVI),PPP, C/SiC composites,Mechanical properties,Fracture toughness
