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1. 发明授权

US3769511A Spacecraft heat shield testing method 失效
标题翻译：空间热屏测试方法
公开(公告)号：US3769511A
公开(公告)日：1973-10-30
申请号：US3769511D
申请日：1970-10-12
申请人： GEN DYNAMICS CORP
发明人： DELACY T
IPC分类号： C23C24/00 , G01N3/56 , G21H5/02
CPC分类号： G01N3/562 , C23C24/00 , G01N2203/0226
摘要： A process for measuring the service life of heat shields on reentry spacecraft after each flight is disclosed. A low electronenergy level, beta emitting, isotope, having a reasonably long half-life, preferably promethium-147, is uniformly dispersed throughout a refractory heat shield coating. The beta particle emission level at the coating surface is measured to provide a base reading. After each space flight, the beta emission level at the coating surface is again measured, such as by autoradiography or with a Geiger-Muller counter. Erosion, abrasive wear, spalling or other damage is detected and measured to determine whether additional flights can be made without re-coating.
摘要翻译：公开了一种在每次飞行之后测量再入射型飞船上的隔热板使用寿命的过程。具有相当长的半衰期（优选ium-147）的低电子能级β射线同位素均匀分散在耐火隔热涂层中。测量涂层表面的β粒子排放水平以提供基底读数。在每次太空飞行之后，再次测量涂层表面的β发射水平，例如通过放射自显影或Geiger-Muller计数器。检测和测量侵蚀，磨损，剥落或其他损坏，以确定是否可以在不重新涂覆的情况下进行额外的飞行。

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