公开(公告)号：US5124283A

公开(公告)日：1992-06-23

申请号：US713594

申请日：1991-06-11

申请人： Jean-Jacques Lebrun ,  Charles Bobichon ,  Olivier Caix

发明人： Jean-Jacques Lebrun ,  Charles Bobichon ,  Olivier Caix

IPC分类号： C04B35/571 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

CPC分类号： C04B35/589 ,  C04B35/571 ,  C08G77/62

摘要： Essentially infusible/insoluble crosslinked polysilazanes, well adapted for pyrolysis and conversion into silicon carbide and/or silicon nitride ceramic materials, are produced by intimately contacting a fusible and organic solvent soluble polysilazane starting material with an effective crosslinking amount of gaseous triflic acid, CF.sub.3 SO.sub.3 H, and in which starting polysilazane the organic radicals directly bonded to silicon atoms are saturated and/or aromatic hydrocarbon radicals and such starting polysilazane being devoid of hydrogen atoms directly bonded to a silicon atom.

摘要翻译： 通过将易熔和有机溶剂可溶性聚硅氮烷起始材料与有效交联量的气态三氟甲磺酸CF 3 SO 3 H紧密接触，生产出适用于热解和转化成碳化硅和/或氮化硅陶瓷材料的本质上不熔/不溶性的交联聚硅氮烷， 并且其中起始聚硅氮烷直接键合到硅原子的有机基团是饱和的和/或芳族烃基，并且这种起始聚硅氮烷没有与硅原子直接键合的氢原子。

公开(公告)号：US5043045A

公开(公告)日：1991-08-27

申请号：US349823

申请日：1989-05-10

申请人： Evelyne Chassagneux ,  Olivier Caix

发明人： Evelyne Chassagneux ,  Olivier Caix

IPC分类号： D01F9/10 ,  C04B41/53 ,  D01F11/00 ,  D06M11/00 ,  D06M11/11 ,  D06M101/00

CPC分类号： C04B41/009 ,  C04B41/5353

摘要： Ceramic fibers based on silicon carbide, silicon nitride or silicon carbonitride are treated with hydrofluoric acid, e.g., with a 3% to 30% aqueous solution of HF, to strip surface impurities therefrom, to reduce critical surface defects and to enhance the rupture strength thereof.

摘要翻译： 基于碳化硅，氮化硅或碳氮化硅的陶瓷纤维用氢氟酸例如用3％至30％的HF水溶液处理以从其中剥离表面杂质，以减少临界表面缺陷并增强其断裂强度 。