摘要
研究了制备工艺和Ｙ２Ｏ３含量对四方多晶氧化锆（ＹＴＺＰ）力学性能的影响，并研究了３ＹＴＺＰ陶瓷的断裂统计、耐热冲击特性。２．５ＹＴＺＰ和３ＹＴＺＰ陶瓷的三点抗弯强度分别为１３６０±１６８ＭＰａ和１０８１±２４３ＭＰａ，Ｗｅｉｂｕｌ模数ｍ分别为８．２７和４．３４；断裂韧性分别为１１．７９ＭＰａ·ｍ１／２和１１．６０ＭＰａ·ｍ１／２。ＹＴＺＰ陶瓷中ＺｒＯ２以四方相与少量的立方相形式存在；压痕裂纹扩展为沿晶和穿晶混合模式。
Influence of processing and Y 2O 3 contents on mechanical properties of Y 2O 3 stabilized tetragonal zirconia polycrystals (Y TZP) was investigated, and the failure statistics and thermal shock resistant properties for 3 Y TZP ceramics were also studied. The 3 point bend strengths are 1360±168 MPa and 1081±243 MPa , the Weibull modulus m are 8.27 and 4.34 ,and the fracture toughness are 11.79 MPa·m 1/2 and 11.60 MPa·m 1/2 respectively for 2.5 Y TZP and 3 Y TZP ceramics. The ZrO 2 in Y TZP ceramics is in the form of tetragonal phase and a small amount of cubic phase. The indentation cracks propagation is typified by an intergranular and transgranular mixed mode .
出处
《南京化工大学学报》
1997年第2期42-48,共7页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
关键词
力学性能
增韧陶瓷
氧化锆陶瓷
陶瓷
phase transformation toughening tetragonal zirconia polycrystals mechanical properties toughening ceramics thermal shock resistance
