三维双连续陶瓷骨架的粘接-复合新技术

A Novel Joining-Compounding Technology of 3D Co-Continuous Ceramic Skeleton

探索了一种构建三维双连续陶瓷-金属复合材料中陶瓷骨架的新途径.采用基于丝网印刷原理的粘接剂涂布新工艺,对99A l2O3陶瓷坯体进行连接,成功实现了复杂空间构型陶瓷骨架的构建.通过SEM表征了陶瓷粘接体粘接界面的微观形貌,探讨了烧制温度对骨架力学性能的影响.结果表明,该工艺有效避免了高温陶瓷粘结剂堵孔的弊病,1 450℃烧结的陶瓷粘接体其抗折强度最佳,结点处的中间层厚度约为250μm.

Based on the screen printing mechanism, a novel process to fabricate the complex-shaped ceramic skeleton of 3D co-continuous ceramic-metal composite was investigated by joining 99% Al2O3 ceramic in the green state with ceramic slurry. The microstructures of the jointing interface were then characterized by means of SEM, and the effect of sintering temperature on the mechanical properties of the skeleton was also analyzed. The results indicate that the hole-blockage of skeleton can be successfully overcome by the new process, and that the skeleton sintered at 1450 ℃ is of the optimal bending strength and an interlayer thickness of about 250 μm at the joint.