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连续SiC纤维增强钛基复合材料(SiCf/Ti)具有良好的综合性能,但其横向性能低于钛合金基体,为了准确地预测SiCf/Ti复合材料的横向强度,提出一种基于界面脱粘强度的计算模型。采用SiCf/Ti复合材料十字拉伸试件来测试复合材料的纤维/基体界面脱粘强度,并分析了热处理工艺对界面脱粘强度影响规律,以及不同纤维之间界面脱粘强度的差别。复合材料横向拉伸试件采用箔-纤维-箔方法制备,每个试件的纤维层数为10层,纤维百分数为30%左右。在不同温度条件下测试复合材料的横向拉伸强度,拉伸温度分别为室温、300,400,550℃,通过对比实验结果和模型预测结果,模型预测的结果与实验结果的误差不超过5%。
In order to accurately predict the transverse strength of SiCf / Ti composites, a continuous SiC fiber reinforced titanium matrix composites (SiCf / Ti) with good properties were synthesized, but its lateral properties were lower than those of titanium alloys. The calculation model. The fiber / matrix interfacial debonding strength of SiC / Ti composites was tested by cross-tensile specimens of SiCf / Ti composites. The influence of heat treatment on interfacial debonding strength and the difference of interfacial debonding strength between different fibers were analyzed. The transverse tensile specimens of composite materials were prepared by foil-fiber-foil method. The number of fiber layers in each specimen was 10 and the fiber percentage was about 30%. Under different temperature conditions, the transverse tensile strength and tensile temperature of the composites were measured at room temperature, 300, 400 and 550 ℃ respectively. The error between the predicted results and the experimental ones was less than 5% by comparing the experimental results and the model predictions.