ZrC–SiC复相陶瓷先驱体的制备与性能  

Preparation and Properties of ZrC-SiC Multi-phase Ceramic Precursors

作　　者：黄传进 王明存[1] 韩伟健[2] 邱文丰[2] 赵彤[2] 

机构地区：[1]北京航空航天大学化学与环境学院仿生智能界面科学与技术教育部重点实验室,北京100191 [2]中国科学院化学研究所,北京100190

出　　处：《硅酸盐学报》2015年第9期1177-1185,共9页Journal of The Chinese Ceramic Society

摘　　要：以聚锆氧烷（PNZ）为锆源树脂、炔基聚硅烷（PEPSI）为硅源树脂、双酚A型苯并噁嗪（BOZ）为碳源树脂,制备一种低成本高效率Zr C-Si C复相陶瓷先驱体。Zr C-Si C复相陶瓷先驱体适合陶瓷基复合材料的循环浸渍-裂解工艺,通过炔基的催化聚合、苯并噁嗪的开环聚合和锆氧烷与酚羟基、硅氢键的缩合聚合,在200~350℃热固化。N2气氛,优化配方中PNZ、PEPSI、BOZ的质量比为1.00：0.30：0.30）。在1 000、1 200、1 400和1 600℃高温裂解陶瓷的产率分别为64%、62%、62%和37%。通过1 600℃碳热还原反应,得到高度结晶和分布均匀的Zr C-Si C复相陶瓷。Zr C-Si C先驱体是理想的低成本超高温陶瓷基体树脂。A liquid ZrC-SiC ceramic precursor was prepared with polyzirconoxanesal as a zirconium source, ethynylpolysilane as a silicon source and benzoxazine as a carbon source. The liquid ZrC-SiC ceramic precursor has a processing capability of precursor infiltration and pyrolysis technique in ceramic composites fabrication. The thermal cure is realized via the catalytic polymerization of ethynyl groups, the ring opening polymerization of benzoxazine rings and the condensation of zirconate with phenolic hydroxyl and Si-H at 200-350 ℃. For the optimized formula, the yields of monolithic ceramics formed on pyrolysis under N2 atmosphere at 1 000, 1 200, 1 400 and 1 600 ℃ are 64%, 62%, 62% and 37%, respectively. The ceramic sample at 1 600℃ changes from compact to porous due to the carbothermal reduction, and the pure and element uniformly distributed ZrC-SiC ceramic is obtained. The liquid ZrC-SiC ceramic precursor is a promising candidate as a low-cost precursor of ultrahigh-temperature ceramics for the possible applications of ultrahigh oxidation resistant composite materials.

关 键 词：碳化硅-碳化锆 先驱体 热固化 复相陶瓷 高温裂解 

分 类 号：TB32[一般工业技术—材料科学与工程]