利用流延成型工艺制备了Al2O3－TiC复相陶瓷薄膜．通过叠层、预压、脱粘和热压烧结工艺，制备了层状结构复相陶瓷．讨论了分散剂、pH值、固含量对浆料粘度的影响．用TGA分析了陶瓷膜的脱粘过程．用SEM和光学显微镜分析了素坯膜的微观形貌和材料在压应力作用下裂纹扩展情况．由于裂纹沿弱界面扩展使应力松弛，有效地提高了材料的断裂韧性和断裂功，为陶瓷的结构设计提供了一条新思路
Al2O3/TiC composite ceramic tapes were prepared by tape casting. After die, binder removal and hot-pressing , the multilayer composites
were acquired . Several factors effecting the viscosity of slurries,such as the ratio of TiC and Al2O3,values of pH and dispersant concentration,
were discussed. The processing of organic additive removal was analysed by TGA . The microstructure of tapes and multilayer composites crack propagation
effected under the stress was analysed by SEM and optical micrographs respectively. The results exhibited the fracture toughness and work of fracture
were increased effectively. The cracks propagate along the weak interface and make the stress relaxation. The multilayered structure design is an effective method for preparing advanced composite ceramic .
参考文献
| [1] | Shanefield D J , Mistler R E. Am.Ceram.Soc.Bull., 1974, 53 (5): 416. 2 Boch P, Chartier T, Huttenpain M. J. Am. Ceram. Soc., 1986, 69(8): C-191. 3 Boch P, Chartier T. J. Am. Ceram. Soc., 1991, 74 (10): 2448. 4 Streicher E, Chartier T, Boch P. J. Mater. Sci., 1991, 26 (6): 1659. 5 Razzell A G, Lewis M H. Ceram Eng. Sci. Proc., 1991, 12 (7-8): 1304. 6 Kevin D, Pluckneet, Carlos H Cacers. J. Am. Ceram. Soc., 1994, 77 (8): 2137. 7 Calvert P D, Tomey E S, Pober R S. Am. Ceram. Soc. Bull., 1985, 65 (4): 669. 8 Richards V L , J. Am. Cerm. Soc., 1989, 72 (2): 325. 9 Sheiffele G W, Sack M D. In: Messing G L, Fuller E R, et al ed. Ceramic Transations, Vol. 1(A), Ceramic Powder Science ?∏. Westerville OH: American Ceramic Society, 1988. 559. 10 Shih W K, Sack M D. In: Messing G L, Fuller E R, et al ed. Ceramic Transations, Vol. 1(A), Ceramic Powder Science ?∏. Westerville OH: American Ceramic Society, 1988. 549. 11 He M Y, Hutchinson J W. J. Appl. Mech., 1989, 56: 270. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%