The effects of sintering additives on the mechanical properties and microstructure evolution of 3 mol% YTZP
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The current work investigates the effects of sintering additives, particularly focused on 0.5 wt% manganese oxide (MnO2) and0.1 wt% alumina (Al2O3), and co-doping both additives together (i.e. MnO2 + Al2O3), on the microstructure and mechanicalproperties of 3 mol% Y-TZP. The doped powders were prepared by attrition milling and subsequently green samples weresintered in air at temperatures ranging from 1250 to 1550 oC with 2 hrs holding time. The results showed that the dopants havenot disrupted the tetragonal phase stability. All the dopants aided sintering at 1250 oC but with MnO2 being most effective inpromoting densification with samples, recording about 97.6% relative density. Similar improvement in the mechanicalproperties was also observed for the doped zirconia. Young’s modulus, Vickers hardness and fracture toughness as high as192 GPa, 13.6 GPa and 4.6 MPam1/2, respectively were obtained for both, the MnO2-doped and co-doped Y-TZPs, whensintered at low temperature of 1250 oC. Microstructural examination, however revealed that the MnO2 dopant promotedexaggerated grain growth when sintered at higher temperatures.
Abstract
The current work investigates the effects of sintering additives, particularly focused on 0.5 wt% manganese oxide (MnO2) and0.1 wt% alumina (Al2O3), and co-doping both additives together (i.e. MnO2 + Al2O3), on the microstructure and mechanicalproperties of 3 mol% Y-TZP. The doped powders were prepared by attrition milling and subsequently green samples weresintered in air at temperatures ranging from 1250 to 1550 oC with 2 hrs holding time. The results showed that the dopants havenot disrupted the tetragonal phase stability. All the dopants aided sintering at 1250 oC but with MnO2 being most effective inpromoting densification with samples, recording about 97.6% relative density. Similar improvement in the mechanicalproperties was also observed for the doped zirconia. Young’s modulus, Vickers hardness and fracture toughness as high as192 GPa, 13.6 GPa and 4.6 MPam1/2, respectively were obtained for both, the MnO2-doped and co-doped Y-TZPs, whensintered at low temperature of 1250 oC. Microstructural examination, however revealed that the MnO2 dopant promotedexaggerated grain growth when sintered at higher temperatures.
참고문헌 (29)
- R.H.J. Hannink, , Ann. Rev. Mater. Sci, 24, pp.359~408 (1994)
- G.Y. Akimov, , Refract. Ind. Ceram, 45, pp.55~57 (2004)
- S. Ramesh, , J. Mater. Sci, 34, pp.5457~5467 (1999)
- B. Bikramjit, , Mater. Sci. Eng. A, 380, pp.215~221 (2004)
- P. Kanellopoulus, , J. Mater. Sci, 37, pp.5075~5082 (2002)
- R.C. Garvie, , Nature, 258, pp.703~704 (1975)
- S. Lawson, , J. Eur. Ceram. Soc, 15, pp.485~502 (1995)
- M.R. Norton, , J. Bone Joint Surg. Br, 84, pp.631~635 (2002)
- K. Kobayashi, , Solid State Ionics, 3-4, pp.489~493 (1981)
- I.C. Clarke, , J. Bone Joint Surg. Am, 85, pp.73~84 (2003)
- M. Cattani-Lorente, , Acta Biomater, 7, pp.858~865 (2011)
- J. Chevalier, , Biomater, 27, pp.535~543 (2006)
- S. Deville, , Biomater, 27, pp.2186~2192 (2006)
- J.Li, , J. Am. Ceram. Soc, 79, pp.3109~3112 (1996)
- S. Ramesh, , Ceram. Silikaty, 57, pp.28~32 (2013)
- A.A.Nogiwa-Valdez, , Acta Biomater, 9, pp.6226~6235 (2013)
- I.M. Ross, , Scripta Mater, 45, pp.653~660 (2001)
- A. Rodriguez Pulido, , Key Eng. Mater, 206-213, pp.1053~1056 (2002)
- D. Ragurajan, , J. Aust. Ceram. Soc, 52, pp.128~133 (2016)
- K. Niihara, , J. Mater. Sci. Lett, 1, pp.13~16 (1982)
- "ASTM Standard C1259-2008e1, Standard test method for dynamic Young’s modulus, shear modulus and poisson’s ratio for advanced ceramic by impulse excitation of vibration", ASTM international, ~ (2008)
- M.I. Mendelson, , J. Am. Ceram. Soc, 52, pp.443~446 (1969)
- H. Toraya, , J. Am. Ceram. Soc, 67, pp.C-119~C-121 (1984)
- F. Zhang, , J. Eur. Ceram. Soc, 35, pp.741~750 (2015)
- M.M. Khan, , J. Mater. Eng. Perform, 23, pp.4328~4335 (2014)
- S. Ramesh, , Ceram. Int, 37, pp.35583~33590 (2011)
- C. Bowen, , J. Mater. Sci, 33, pp.5103~5110 (1998)
- S.N.B. Hodgson, , J. Mater. Proc. Technol, 92-93, pp.85~90 (1999)
- R. Singh, , J. Mater. Sci, 31, pp.6055~6062 (1996)