中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 2 April 2004 |
Al2O3/PSZ(3Y) ceramic composites①
（1.Institute of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
2. Institute of Mechanical Engineering, Shenyang University, Shenyang 110044, China）
Abstract:The content of partially stabilized zirconia has remarkable influence on densification and mechanical properties of Al2O3/PSZ(3Y) ceramic composites. When 15%PSZ(3Y) is added to Al2O3, after vacuum sintering for 2 h at 1 550 ℃, the fracture toughness and bending strength of the Al2O3/PSZ(3Y) ceramic composite reaches 8.2 MPa·m1/2and 884 MPa, respectively. The effect of the content of PSZ(3Y) on relative density and mechanical properties was investi-
gated. The change ofm-ZrO2andt-ZrO2phases content before and after fracture was measured by X-ray diffraction quantitative phase analysis. It is confirmed that improvement in bending strength and fracture toughness of the Al2O3/ PSZ(3Y) ceramic composite is due to the phase transformation toughening mechanism of PSZ(3Y).
Key words: Al2O3/PSZ(3Y) ceramic composite; vacuum sintering; transformation toughening; mechanical properties
