公开(公告)号：US5298311A

公开(公告)日：1994-03-29

申请号：US450145

申请日：1989-12-13

申请人： Larry D. Bentson ,  Robert J. Price ,  Mark J. Purdy ,  Edward R. Stover

发明人： Larry D. Bentson ,  Robert J. Price ,  Mark J. Purdy ,  Edward R. Stover

IPC分类号： C04B35/80 ,  C04B41/52 ,  C04B41/89 ,  B32B9/00

CPC分类号： C04B41/009 ,  C04B35/806 ,  C04B41/52 ,  C04B41/89 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/249957 ,  Y10T428/24999 ,  Y10T428/25 ,  Y10T428/258 ,  Y10T428/30

摘要： Carbon/carbon composites including those structures formed from a fibrous reinforcement itself formed principally from carbon in a carbon matrix are protected against oxidation by multi-layer sealant system preferably including a multi-layer paint including in its carbonized binder refactory granules and inhibitor particles that form a moisture resistant, viscosity-stabilized borate glass when exposed to a high-temperature, oxidizing environment, and an outer ceramic shell formed by CVI/CVD in situ formation of boron carbide followed by silicon carbide. The paint is prepared by mixing finely divided powders of borate precursor compounds or borate glass frit and refractory granules with a carbon char yielding precursor binder such as phenolic resin or pitch which preferably produces a highly porous structure upon carbonization.

摘要翻译： 包括由主要由碳基体中的碳形成的纤维增强本身形成的那些结构的碳/碳复合材料通过多层密封剂系统被保护以防止氧化，优选地包括多层涂料，其包括在其碳化粘合剂的重构颗粒和形成 当暴露于高温氧化环境时，防潮，粘度稳定的硼酸盐玻璃，以及通过CVI / CVD形成的外部陶瓷壳体原位形成碳化硼，然后碳化硅。 通过将硼酸盐前体化合物或硼酸盐玻璃料和耐火颗粒的细碎粉末与碳炭产生前体粘合剂如酚醛树脂或沥青混合来制备涂料，其优选在碳化时产生高度多孔的结构。