Effects of MnO_2 and TiO_2 on Low-temperature Sintering and Properties of 8YSZ AITranslate

1Cao X Q, Vassenb R, Stoever D. Ceramic materials for thermal barrier coatings[J]. Journal of the European Ce- ramic Society, 2004,24 : 1-10.

2Krystyna Kobylanska, Szkaradek. Laser melted ZrO2- Y2O3 thermal barrier obtained by plasma spraying method [J].Journal of Alloys and Compounds, 2010, 505..516-520.

3Boris Preauchat. Isothermal and cycling properties of zirconia-based thermal barrier coatings deposited by PECVD[J]. Surface and Coatings Technology, 2001, 146:94-101.

4Steve A. High-tech coating for turbine blades[J]. Mechanical Engineering, 1995,117(10): 66-69.

5Wang Z C,Jane Shemilt,Xiao P. Fabrication of ceramic composite coatings using electrophoretic deposition, re- action bonding and low temperature sintering[J]. Journal of the European Ceramic Society, 2002,22:183-189.

6Lu X J, Xiao P. Constrained sintering of YSZ/Al2O3 composite coatings on metal substrates produced from eletrophoretic deposition[J]. Journal of the European Ceramic Society,2007,27 ..2 613-2 621.

7Wang X, Lan W H, Xiao P. Fabrication of yttria stabi- lized zirconia coatings by anovel slurry method[J].Thin Solid Films, 2006,494 : 263-268.

8Nasar R S,Cerqueira M. Sintering mechanisms of ZrO2 · MgO with addition of TiO2 and CuO[J]. Ceramics In- ternational, 2004,30 : 571-577.

9Ramesh S, Meenaloshini S, Tan C Y. Effect of manga- nese oxide on the sintered properties and low tempera- ture degradation of Y-TZP ceramics[J]. Ceramics Inter- national, 2008,34 : 1 603-1 608.

10Erkalfa H,Mm-h Z,Baykara T. The effect of TiO2 and MnO2 on densification and microstructure development of alumina[J].Ceramics International, 1998,24 .. 81-90.

Basic Information:

DOI：

Chinese Library Classification Number:TF125.42[冶金工程—粉末冶金]

Citation Information:

MnO2 and TiO2 were employed as the sintering aids of 8YSZ （8 %Y2 O3-ZRO2 ）. Effects of aid dosage and composition and sintering temperature on the density and mechanical properties of 8YSZ were investigated. The results show that adding MnO2 and TiO2 is beneficial for sintering densification of 8YSZ, and MnO2 is more effective than TiO2 as the sintering aid. MnO2 and TiO2 are successfully doped into the ZrO2 lattice at 1 300 ℃ ,improving the hardness, bending strength, fracture toughness and tetragonal phase content of 8YSZ. The density and mechanical properties of 8YSZ is improved with higher sintering temperature. When TiO2 dosage increases from 0 to 3% and MnO2 dosage decreases from 3% to 0,all the density, Vickers hardness and bending strength of 8YSZ are gradually reduced .