乔生儒
,
杨忠学
,
韩栋
,
李玫
材料工程
doi:10.3969/j.issn.1001-4381.2004.04.009
对3D-C/SiC复合材料进行拉伸蠕变试验,蠕变进行一段时间后,用扫描电子显微镜(SEM)观察试样表面的变化,同时测量试样的共振频率.结果表明,3D-C/SiC除通常CMC所产生的蠕变损伤外,纤维束滑动,纤维束之间的夹角变化,孔隙变形,部分孔隙表面空间位置改变,孔隙表面产生基体微裂纹,损伤在纤维束交...
关键词:
蠕变损伤机理
,
3D-C/SiC
,
纤维束交叉处
,
模量
,
损伤表征
任伟华
,
乔生儒
,
敖强
材料工程
doi:10.3969/j.issn.1001-4381.2003.12.007
用3D-C/SiC和重结晶SiC陶瓷材料在光辐射热震试验机上进行了两种温度落差(AT=600 ℃,800 ℃)和不同应力的热震试验.3D-C/SiC用弹性模量和电阻表征的热震损伤曲线有相似的规律,即都大致由三阶段构成,首先是损伤急剧增加阶段,紧接着是损伤缓慢增加阶段,最后为损伤短暂的急剧增加阶段.个...
关键词:
热震
,
3D-C/SiC
,
重结晶SiC
,
损伤
,
弹性模量
D.Han
,
S.R.Qiao
,
M.Li
,
J.T.Hou
,
X.J.Wu
金属学报(英文版)
The differences of tension-tension fatigue and tensile creep characters of 2D-C/SiC and 3D-C/SiC composites have been scrutinized to meet the engineering needs. Experiments of tension-tension fatigue and tensile creep are carried out under vacuum high temperature condition. All of the high temperatu...
关键词:
2D-C/SiC
,
null
,
null
G.C.Ji
金属学报(英文版)
Based on the energy conservation, the elastic energy linked to the compliance change, non-elastic energy dissipated by irreversible deformation and the resistance for crack propagation were quantitatively characterized by evaluation the load/qoad point displacement curves tested by three points bend...
关键词:
fracture resistance
,
null
,
null
