论文部分内容阅读
研究了沉淀法制备Al_2O_3－SiC纳米复合陶瓷的工艺过程，利用Al_2O_3从，γ相到α相的蠕虫状生长过程，使大部分纳米SiC颗粒位于Al_2O_3晶粒内．用沉淀法制得的、含有5vol％SiC的Al_2O_3－SiC纳米复合陶瓷，其强度为467MPa，韧性为4．7MPa·m1/2，与一般的Al2O3陶瓷相比有较大的提高，显示了沉淀法制备Al_2O_3－SiC纳米复合陶瓷的优点．
The preparation process of Al_2O_3-SiC nanocomposite ceramics by precipitation method was studied. The worm-like growth of Al_2O_3 from γ phase to α phase was carried out, and most of the SiC particles were located in the Al_2O_3 crystal grains. Al_2O_3-SiC nano-composite ceramics with 5vol% SiC prepared by the precipitation method have a strength of 467MPa and a toughness of 4.7MPa · m1 / 2, which is greatly increased compared with the common Al2O3 ceramics. The precipitation method Advantages of Preparing Al_2O_3-SiC Nanocomposites.