先驱

The joining of C_f/SiC composites with preceramic silicone resin at high temperature was studied.

对先驱体硅树脂高温转化陶瓷接头连接Cf/SiC复合材料进行了研究。

Joining of ceramics and ceramic matrix composites by using preceramic polymer s is a novel technique with lower cost and higher joining strength.

用陶瓷先驱体有机聚合物连接陶瓷及陶瓷基复合材料是一种成本低廉、工艺新颖、可满足特殊高温条件下连接件要求的新型连接技术。

According to the configuration of porous ceramics, there are two kinds of means to make porous ceramics by preceramic polymer pyrolysis, namely bulk structure porous ceramics and ceramic foams.

根据所得多孔陶瓷的形态，先驱体转化法制备多孔陶瓷大致可分为两类：制备本征结构的多孔陶瓷，制备泡沫陶瓷。

The joining of graphite, ceramic SiC and C_f/SiC composites via preceramic silicone resin at high temperature (800~1400℃) was studied.

对先驱体硅树脂高温(800～1400℃)转化陶瓷接头连接石墨、陶瓷SiC及Cf/SiC复合材料进行了研究，着重对硅树脂固化裂解过程、硅树脂溶液浓度及裂解温度对连接性能的影响进行了探讨。

This article reviewes the recent progress in applied research of several typical preceramic polymers,including polycarbosilane,polysilazane,polysiloxane, polysilane ,etc,which were used in the preparation of ceramic materials.

概述了几种典型的陶瓷先驱体聚合物聚碳硅烷、聚硅氮烷、聚硅氧烷和聚硅烷等在陶瓷材料制备中的应用研究进展，重点阐述了在该领域所取得的研究成果，并针对目前存在的不足提出了今后的研究方向。

The joining of graphite,ceramic SiC and C_f/SiC composites via preceramic silicone resin at high temperature(800~1400℃) is studied.

对先驱体硅树脂高温(800~1400℃)转化陶瓷接头连接石墨、S iC陶瓷及Cf/S iC复合材料进行了研究，着重对硅树脂固化裂解过程、硅树脂溶液浓度、裂解温度及惰性填料对连接性能的影响进行了探讨。

Polycarbosilane was used as the preceramic for matrix formation and 2D layered 0°/90° fabrics as the reinforcement to fabricate C/SiC composites. The effect of pyrolysis temperature and slurry concentration on the properties of the composites was systematically studied.

采用聚碳硅烷作为碳化硅先驱体，以二维0°/90°正交编织碳布叠层后作为增强体，采用真空压力浸渍的方法制备了C/SiC复合材料，研究了裂解温度和浆料浓度对复合材料性能的影响。

Si-B-N ceramic fibers with composition Si1.13BN2.47 were prepared by melt-spinning, curing and pyrolysis of a preceramic polyborosilazane.

以聚硼硅氮烷为先驱体，经熔融纺丝、不熔化处理以及在氨气气氛中高温裂解制备了Si-B-N陶瓷纤维。

Joining of carbon fiber reinforced SiC composite to itself was realized via preceramic silicone polysilazane with aluminium nanopowders as joining materials.

摘 要：采用陶瓷先驱体转化法连接Cf/SiC复合材料。

By using three broad distribution standards of polytitanocarbosilane whose number average molecular weights are determined by VPO, the calibration equation of gel permeation chromatography of the preceramic polymer polytitanocarbosilane which generally haslow average molecular weight and high branching degree was established as follows: ln M=

采用以气相渗透法测定了数均分子量的宽分布含钛聚碳硅烷作标样，通过计算机辅助建立了具有较低分子量和较高支化度的陶瓷先驱体聚合物——含钛聚碳硅烷的凝胶渗透色谱校准方程lnM＝20.9－0.843T。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。