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采用以B-C陶瓷为基体自愈合改性组元的2D-C/[SiC-(B-C)]以及经过硅硼玻璃改性的2D-C/[SiC-(B-C)]制备浮壁瓦片,分别在1000、1200、1350℃下对其进行发动机燃烧室环境考核.对考核后的浮壁瓦片进行取样,并在室温下进行拉伸强度以及三点弯曲强度测试.结果发现:经过环境考核试样的力学性能都有不同程度的提高,拉伸强度和三点弯曲强度随着考核温度的升高而提高,其中三点弯曲强度的升高速率更快.通过SEM观察,B-C自愈合组元氧化生成的玻璃相以及改性硅硼玻璃相在考核过程中有效地封填了试样的孔隙和裂纹.最后通过力学性能测试结合SEM观察,初步分析了两种复合材料在航空发动机燃烧室中的愈合机制.
Floating tile was prepared by using 2D-C / [SiC- (BC)] self-healing modified component with BC ceramics and 2D-C / [SiC- (BC) Respectively, at 1000,1200,1350 ℃ under its engine combustion chamber environmental assessment of the assessment after the float wall tile sampling, and at room temperature tensile strength and three-point bending strength test results found that: after environmental assessment The tensile strength and three-point bending strength increased with the increase of the test temperature, of which the three-point bending strength increased more rapidly.With SEM observation, BC self-healing The glassy phase and the modified borosilicate glass phase oxidized by the component effectively filled the pores and cracks of the sample in the process of assessment.At last, the mechanical properties and the SEM were used to analyze the effects of the two composites on the aeroengine combustion Room healing mechanism.