Tensile creep properties and damage mechanisms of 2D-SiCf/SiC composites reinforced with low-oxygen high-carbon type SiC fiber

被引：31

作者：

Wang, Xi ^{[1
,2
]}

Song, Zhuolin ^{[1
,2
]}

Cheng, Zanlin ^{[1
,2
]}

Han, Dong ^{[1
,2
]}

Li, Mei ^{[1
,2
]}

Zhang, Chengyu ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shanxi, Peoples R China

[2] Northwestern Polytech Univ, NPU SAS Joint Res Ctr, Xian 710072, Shanxi, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2020年 / 40卷 / 14期

关键词：

2D-SiCf/SiC composites; Tensile creep; Damage mechanisms; SiC fiber; SIC/SIC COMPOSITES; FATIGUE BEHAVIOR; SILICON-CARBIDE; MATRIX COMPOSITES; FRACTURE; STRESS; TEMPERATURE; OXIDATION; RUPTURE;

D O I：

10.1016/j.jeurceramsoc.2020.01.033

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：

Tensile creep properties of 2D-SiCf/SiC composites reinforced with low-oxygen high-carbon type SiC fibers were studied in vacuum at 1300 degrees C -1430 degrees C. The fracture morphology was observed by scanning electron microscopy and the damage of fiber in 2D-SiCf/SiC composites was characterized by nanoindentation. Moreover, the microstructure of the composite was investigated by high-resolution transmission electron microscopy. The results show that rupture time is much shortened and steady-state creep rate increase three orders of magnitude when creep temperature is higher than 1400 degrees C. There are two different creep damage mechanisms due to the decrease of interfacial bonding strength at high temperature. The amorphous SiOxCy phase in the fibers can crystallize into SiC and C and the SiC grain grows in the fiber. The microstructural changes lead to the decrease of fiber strength and degrade the creep properties of the composite above 1400 degrees C.

引用

页码：4872 / 4878

页数：7

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