陶瓷防热瓦用应变隔离垫的制备及性能  

Preparation and Properties of Strain Isolation Pad for Ceramic Insulating Tile

作　　者：周洁洁[1] 孙陈诚[1] 陈育阳 徐云辉[1] 胡子君[1] ZHOU Jiejie SUN Chencheng CHEN Yuyang XU Yunhui HU Zijun(Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials ＆ Processing Technology, Beijing 100076)

机构地区：[1]航天材料及工艺研究所,先进功能复合材料技术重点实验室,北京100076

出　　处：《宇航材料工艺》2017年第3期61-63,共3页Aerospace Materials & Technology

摘　　要：通过SEM等手段对以芳纶纤维为原料,采用针刺工艺制备的应变隔离垫的微观结构、力学、粘接和耐温性能进行表征与分析。结果表明:当针刺密度为35针/cm2、材料密度为0.18 g/cm3时,材料具有很好的应变协调能力和力学性能,经200℃以下温度热处理,材料无明显变化,强度仍可达0.9 MPa。在风洞考核环境下,陶瓷瓦热防护组件最高表面温度1 500℃,风洞考核后,组件无开裂、松动现象,验证了应变隔离垫用于陶瓷瓦粘接的可靠性。The microstructure,tensile strength,bonding properties, high temperature resistance of strain isolation pad,which was prepared by needle process with aramid fibers as material are investigated.The results show that strain isolation pad has good coordinate deformation capacity and tensile strength when the punch density is 35 punches/cm^2 and the material density is 0.18 g/cm^3.When the heating temperature is lower than 200℃, there is no significant change of structures and intensity. At the wind tunnel environment, maximum surface temperature is 1500℃, the ap- parece of the thermal protection system is complete with no cracks and no looseness after the wind tunnel test, the test results validate the reliability of strain isoation pad.

关 键 词：应变隔离垫 芳纶纤维毡 应变协调 

分 类 号：V475.2[航空宇航科学与技术—飞行器设计]