顯微組織和性能的影響
( 1. 中南大學 物理科學與技術學院， 長沙 410083；
2. 南昌航空工業(yè)學院 材料科學與工程系， 南昌 330034)
摘 要: 采用極性分散劑， 在微米Al2O3基體中加入微米ZrO2和納米SiC顆粒， 用真空熱壓法制備出了Al2O3/SiC納米復合陶瓷，并研究了微米ZrO2 和納米SiC的添加對Al2O3/SiC納米復合陶瓷顯微組織及其性能的影響。結果表明： 與純Al2O3比較，適量微米ZrO2 和納米SiC 顆粒的加入阻礙了Al2O3晶粒的長大，使復合陶瓷的顯微組織非常細小, 納米復合陶瓷燒結后的力學性能大大提高。
關鍵字: Al2O3/SiC納米復合陶瓷; 顯微組織; 力學性能
（ 1. School of Physics Science and Technology, Central South University,Changsha 410083, China;
2. Department of Materials Science and Engineering,
Nanchang Institute of Aeronautical Technology, Nanchang 330034, China）
Abstract: The micron particle Al2O3 based nanocomposite ceramics reinforced with micro ZrO2 and nano SiC particle were prepared by polarity dispersant and vacuum-sintering technology, and the influences of micro ZrO2 and nano SiC on sintering technology were investigated. The results show that the proper quantity of micro ZrO2 and nano SiC particle prohibit Al2O3 grain growth excessly and the microstructures are fine comparing with the pure Al2O3 matrix ceramic and the mechanical properties of Al2O3/SiC nanocomposite ceramics are enhanced greatly.
Key words: Al2O3/SiC nanocomposite ceramics; microstructures; mechanical properties
