以聚碳硅烷(PCS)为原料,采用熔融纺丝制备三叶型PCS纤维后,经不熔化和烧成制得三叶型碳化硅纤维。研究了纺丝温度、收丝速度等对纤维异形度的影响,并对预氧化和烧成工艺以及吸波性能等进行了研究。研究表明,较低的纺丝温度、适当高的纺丝压力和较低的转速有利于提高纤维的异形度。与相同当量直径的圆形纤维相比,三叶型碳化硅纤维的抗拉强度平均提高约30%,三叶型碳化硅纤维在8~18 GHz范围内具有较好的吸收雷达波性能。
Trilobal polycarbosilane(PCS) fibers were prepared by melt spinning PCS precursor through Y-shaped spinneret. Then, after curing in air and heat treatment under N2 atmosphere, trilobal silicon carbide fibers were manufactured. The effect of spinning temperature and velocity on the fibers degree of profile was analyzed. Preparation conditions such as curing, heat-treatment and microwave-absorbing properties were also studied. Compared with circular SiC fibers, the fiber exhibits higher mechanical properties and microwave-absorbing properties. The structural radar absorbing materials, composed of the fibers with resin, exhibit a reflection attenuation amount of 10~20 dB in the range of 8~18 GHz.
参考文献
[1] | [1] 朱绪宝. 隐身技术室提高武器系统作战效能的关键技术[J]. 隐身技术,1998,1(1):6. |
[2] | [2] 冯春祥, 宋永才, 陆 逸,等. 连续碳化硅纤维研究[J]. 国防科技大学学报,1993,15(1):66. |
[3] | [3] 冯春祥, 王应德, 宋永才,等. 连续碳化硅纤维应用概况[J]. 材料导报,1997,11(6):64. |
[4] | [4] 程海峰, 陈朝辉,等. 先驱体转化法制备改性SiC吸收剂[J]. 隐身技术,1998,1(1):29. |
[5] | [5] 宋永才, 冯春祥, 王应德,等. 连续PCS不熔化纤维研制[A]. 第九届全国复合材料会议论文集[C],1996.561. |
[6] | [6] 王应德, 鲁建英, 何迎春,等. 连续聚碳硅烷纤维直径控制研究[J]. 功能材料,1998,29(增刊):991. |
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