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- 2018
γ射线辐照对高模量碳纤维及碳纤维/氰酸酯复合材料性能的影响
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Abstract:
通过模拟空间γ射线辐照环境，采用60Co-γ射线对高模量碳纤维及其增强的改性氰酸酯复合材料进行辐照，采用SEM和XRD对辐照前后的碳纤维及碳纤维/氰酸酯复合材料进行了分析和表征，研究了复合材料的质量损失率、拉伸性能及层间剪切强度随γ射线辐照剂量的变化规律。结果表明，γ射线辐照能增加碳纤维表面粗糙度；质量损失率随γ射线辐照剂量增大先增加后趋于平缓，但均小于1%；碳纤维/氰酸酯复合材料拉伸性能与层间剪切强度均随γ射线辐照剂量增大先提高后降低，在吸收剂量为5×105 rad时出现最大值，拉伸强度为1 803 MPa，拉伸模量为243 GPa，层间剪切强度为72 MPa。 By simulating geosynchronous orbit space γ ray irradiation environment, the high modulus carbon fiber and carbon fiber/cyanate ester composites were irradiated by 60Co-γ ray. The carbon fiber and carbon fiber/cyanate ester composites were analyzed and characterized by SEM and XRD before and after irradiation. The effects of irradiation on the mass loss rate, tensile strength and interlaminar shear strength were studied. The results show that the mass loss rates increase with the increase of γ ray dose and then tend to be gentle, but less than 1%; the tensile strength and interlaminar shear strength of carbon fiber/cyanate ester composites both increase firstly and then decrease with increasing dose, the maximum values occur at 5×105 rad with tensile strength of 1 803 MPa, tensile modulus of 243 GPa and interlaminar shear strength of 72 MPa.
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