COMPARISON OF FATIGUE AND CREEP BEHAVIOR BETWEEN 2D AND 3D-C/SiC COMPOSITES

金属学报(英文版), 2004, 17(4): 569-574.

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1.Ultra-high-temperature Thermostructural Composites Laboratory, Northwestern Polytechnical University,Xi'an 710072, China

2.Ultra-high-temperature Thermostructural Composites Laboratory, Northwestern Polytechnical University,Xi'an 710072, China

3.Ultra-high-temperature Thermostructural Composites Laboratory, Northwestern Polytechnical University,Xi'an 710072, China

4.Ultra-high-temperature Thermostructural Composites Laboratory, Northwestern Polytechnical University,Xi'an 710072, China

5.Ultra-high-temperature Thermostructural Composites Laboratory, Northwestern Polytechnical University,Xi'an 710072, China

基金项目: 国防科研项目

COMPARISON OF FATIGUE AND CREEP BEHAVIOR BETWEEN 2D AND 3D-C/SiC COMPOSITES

Keywords： 2D-C/SiC

The differences of tension-tension fatigue and tensile creep characters of 2D-C/SiCand 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 temperature fatigue curves are flat; the fatigue curves of the 2D-C/SiC are flatter and even parallel to the horizontal axis. While the tension-tension fatigue limit of the 3D-C/SiC is higher than that of the 2D-C/SiC, the fiber pullout length of the fatigue fracture surface of the 3D-C/SiC is longer than that of the 2D-C/SiC, and fracture morphology of the 3D-C/SiC is rougher, and pullout length of the fiber tows is longer. At the same time the 3D-C/SiC has higher tensile creep resistance. The tensile curve and the tensile creep curve of both materials consist of a series of flat step. These phenomena can be explained by the non-continuity of the damage.

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COMPARISON OF FATIGUE AND CREEP BEHAVIOR BETWEEN 2D AND 3D-C/SiC COMPOSITES

参考文献