Stressed-oxidation behavior of 2D CVI SiC/BN/SiC at elevated temperature in air

被引：6
|
作者：
Han, Xiao [1 ,3 ]
Pan, Rong [5 ]
Shi, Jian [5 ]
Yu, Guoqiang [1 ,3 ]
Song, Fangxiao [1 ,3 ]
Gao, Xiguang [1 ,3 ]
Song, Yingdong [1 ,3 ,4 ]
Wang, Fang [2 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Key Lab Aeroengine Thermal Environm & Struct, Minist Ind & Informat Technol, Coll Energy & Power Engn, Nanjing 210016, Peoples R China
[2] Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210016, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing 210016, Peoples R China
[4] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China
[5] AECC Sichuan Gas Turbine Estab, Chengdu 610500, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 20期
关键词：
SiC; BN; SiC composites; Intermediate temperature; Stressed-oxidation behavior; Strain-time curve; Failure mechanism; MATRIX COMPOSITES; BORON-NITRIDE; RUPTURE; MECHANISMS; LIFETIME; FIBERS; CARBON; DAMAGE;
D O I：
10.1016/j.ceramint.2021.06.082
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The stressed-oxidation behaviors of 2D woven SiCf/BN/SiC composites were investigated at 950 degrees C and 1100 degrees C in air. The different proportions (60%-90%) of the ultimate tensile strength (UTS) at corresponding temperatures were chosen as constant stress. The stressed-oxidation experiments were taken to failure or interrupted (240h). The UTS decreases by 20.75% at 950 degrees C and 30.71% at 1100 degrees C. The composites did not fail during stressed oxidation when subjected to constant stress corresponding to the initial linear and the beginning of nonlinear segments of the tensile curve, above which the composites failed with a maximum failure life of about 10h. Fiber degradation due to the thermal exposure and the fiber cracks caused by the oxidation of BN interface coating and SiC fiber could be responsible for the strength degradation and failure of the composites during stressed oxidation.
引用
收藏
页码：28158 / 28166
页数：9
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