Shijie Zhang
材料科学技术（英）
Considering the unique properties of small spacecraft, such as light weight, low power-consumption and high heat flux density, a new kind of lightweight boron carbide (B4C) radiation-protection coating material was proposed. New techniques for preparing LSMO thermal control coating and B4C radiation-protection coating were developed. The sample piece of multi-functional structure was manufactured by using the proposed materials, and a series of performance tests, such as thermal control and radiation-protection behaviors were evaluated. Test results show that: the emissivity of the multi-functional structure varies from 0.42 to 0.86 at 240 K to 353 K and the phase transition temperature is about 260 K. The electron radiation-protection ability of the multi-functional structure is 3.3 times better than that of Al material. The performance index of this multi-functional structure can meet the requirements for space application in on-board electronic equipment.
关键词:
Coating material
李岩
,
刘泊天
,
张静静
,
高鸿
,
邢焰
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2015.01.010
为满足航天电子产品的工艺实施和空间服役要求,本文详细开展了MD-130胶黏剂的固化工艺及空间适应性研究.结果表明,在150℃等温固化60 min后其拉伸剪切强度达到18 MPa,表明其为优选的固化工艺.高低温环境冲击和低剂量的粒子辐照后胶黏剂固化反应更加充分,其芯片剪切强度提高,而大剂量辐照致使高分子降解现象明显,造成了胶接强度的降低.经环境试验后,MD-130胶黏剂仍具有良好的力学性能,满足设计使用要求.
关键词:
航天器
,
固化
,
力学性能
,
辐照
王开石
,
匡松连
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2016.06.001
近年来,新研航天飞行器气动热环境往往具有高焓、高热流密度和长时间加热等特点,这促使防热材料的研制朝着低密度、高抗烧蚀、优良隔热等性能的方向发展.受自身材料类型的限制,无论烧蚀型(树脂基)或非烧蚀型(陶瓷基)防热材料都可以通过对烧蚀表面进行涂层处理的手段达到弥补材料性能短板,提高使用性能的目的.本文试图梳理、总结国内外近年来热防护系统用涂层材料的发展状况,探讨各自的优势和缺点,并提出了针对树脂基复合材料热防护涂层可能趋势的推测.
关键词:
航天飞行器
,
热防护系统
,
涂层
,
烧蚀
