欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用SEM、EDS、XRD分析了SiB4微粉化学气相渗透（CVI）SiC后的组成和结构,并用热力学计算研究了SiB4微粉在CVI SiC过程中变化的原因。结果表明：在CVI SiC过程中SiB4微粉不发生分解,但在近表层处氧化生成SiO2和B2O3。用SiB4浆料浸渍结合CVI工艺对C/SiC基体进行自愈合改性时,难以形成均匀致密的基体。
英文摘要：
The phase composition and microstructure of SiB4 powder during the process chemical vapor infiltration（CVI） of SiC were analyzed by EDS,SEM,XRD.Thermodynamic calculation was carried out in order to investigate the changes of SiB4 powder.The results show that the SiB4 particles do not decompose during CVI SiC process,but they are oxidized to form SiO2 and B2O3 near the external surface of the specimen.Therefore,the matrix of C/SiC composite modified by SiB4 particles,by using CVI combining with slurry infiltration processes,is not homogeneous and compact.The uneven oxidation makes it difficult to study the oxidation mechanism of C/SiC-SiB4 composite.
同期刊论文项目
同项目期刊论文
Nondestructive evaluation and mechanical characterization of a defect-embedded ceramic matrix compos
Behavior of two-dimensional C/SiC composites subjected to thermal cycling in controlled environments
The Acoustic Emission Characteristics of Silicon Carbide Firber Reinforced composite Under Tensile L
Acoustic Emission Research on Thermal Shock Behaviors of Three-Dimensional C/SiC Composites in Diffe
Damage analysis of 2D C/SiC composites subjected to thermal cycling in oxidizing environments by mec
Thermal expansion behavior of carbon fiber reinforced chemical-vapor-infiltrated silicon carbide com
Thermal cycling response behavior of ceramic matrix composites under load and displacement constrain
Damage mechanisms of C/SiC composites subjected to constant load and thermal cycling in oxidizing at
Effect of shrinkage constraint on damage of C/SiC composites during thermal cycles in oxidising atmo
Numerical Simulation of Effect of Methyltrichlorosilane Flux on Isothermal Chemical Vapor Infiltrati
Thermal cycling damage mechanisms of C/SiC composites in displacement constraint and oxidizing atmos
Comparative Modeling of Gas Transport in Isothermal Chemical Vapor Infiltration Process of C/SiC Com
Modeling the effects of thermal and mechanical load cycling on a C/SiC composite in oxygen/argon mix
Relationship of damage evolution of ceramic matrix composites between static and dynamic oxidizing g
Residual strength prediction of SiC/SiC composite exposed to service environments with factor analys
Monotonic tensile behavior analysis of three-dimentional needle-punched Wover C/SiC Composites by Ac
Life Prediction of 3D woven C/SiC Composites at High Temperatures with Low Frequency Cyclic Stresses
Experimental research on failure mechanism of a CVI-fabricated ceramic matrix composite under compre
Tension-tension fatigue damage characteristics of a 3D SiC/SiC composite in H2O-O2-Ar environment at
Oxidation protective multilayer CVD SiC coatings modified by a graphitic B-C interlayer for 3D C/SiC
Characterization of tensile behavior of a two-dimensional woven carbon/silicon carbide composite fab
Stress-Oxidationbehavior of a carbon/silicon carbide composite in a high temperature combustion envi
Tensile behavior and microstructural evolution of a carbon/silicon carbide composite in simulated re
Effect of temperature gradients and stress levels on damage of C/SiC composites in oxidizing atmosph
Experimental simulation of the space re-entry environment for a carbon/silicon carbide composite and
期刊信息
位置：