Phase stability and microstructure of manganese-doped calcia-stabilized zirconia heat treated in a reducing atmosphere

作者：Huang Yen Lin; Lee Ying Chieh; Tsai Du Cheng; Huang Rong Hsin; Shieu Fuh Sheng^*

来源：Ceramics International, 2014, 40(1): 2373-2379.

DOI：10.1016/j.ceramint.2013.08.008

• Aging test
• Calcia stabilized zirconia (CSZ)
• Manganese
• Oxygen partial pressures

The effects of Mn3O4 addition and annealing under a reducing atmosphere (N-2:H-2=97:3) on the microstructure and phase stability of calcia-stabilized zirconia (CSZ) ceramics sintered at 1500 degrees C for 3 h in air were investigated. Undoped and Mn3O4-doped 12.5 mol% CSZ (125CSZ) ceramics were prepared via a conventional solid-state reaction process. X-ray diffraction patterns showed a single cubic phase of ZrO2 in 0.3 mol% Mn3O4-doped 125CSZ after sintering at 1500 degrees C for 3 h. Monoclinic ZrO2 phases were observed in 0.5 mol% Mn3O4-doped 125CSZ and undoped 15 mol% CSZ ceramic after annealing at 1300 C for 30 cycles in a reducing atmosphere. The amount of monoclinic ZrO2 phase observed in 0.5 mol% Mn3O4-doped 125CSZ was less than that found in undoped 15 mol% CSZ annealed at 1300 degrees C under a reducing atmosphere.

• 出版日期2014-1