Effect of La2O3 addition and sintering mode on the mechanical properties and microstructural evolution on an 8YSZ ceramic alloy

A. Muthuchamy; Nidhi Nagaraju; Dinesh K. Agrawal; A. Raja Annamalai

doi:10.1016/j.ceramint.2018.11.028

Effect of La₂O₃ addition and sintering mode on the mechanical properties and microstructural evolution on an 8YSZ ceramic alloy

A. Muthuchamy, Nidhi Nagaraju, Dinesh K. Agrawal, A. Raja Annamalai

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

In this research, the influence of La₂O₃ addition on the microstructure, phase stability and mechanical properties of 8 mol% yttria stabilized zirconia (8YSZ) was studied. 8YSZ with La₂O₃ (9, 12 and 15 wt%) ceramics were fabricated by microwave and conventional sintering at 1400 °C/ 20 min and 1400 °C/ 5 h, respectively. Irrespective of the sintering technique, the relative sintered density was found to decrease with increasing amount of La₂O₃. The grain growth of 8YSZ was enhanced significantly by the addition of La₂O₃. The XRD results demonstrated that addition of La₂O₃ up to 15 wt% did not disrupt the cubic 8YSZ phase regardless of sintering technique; additionally evolution of pyrochlore phase, La₂Zr₂O₇ was observed in all sintered specimens. Vickers hardness of 8YSZ ceramic compacts were also found to decrease with increasing amount of La₂O₃.

Original language	English (US)
Pages (from-to)	3668-3674
Number of pages	7
Journal	Ceramics International
Volume	45
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2018.11.028
State	Published - Feb 15 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2018.11.028

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title = "Effect of La2O3 addition and sintering mode on the mechanical properties and microstructural evolution on an 8YSZ ceramic alloy",

abstract = "In this research, the influence of La2O3 addition on the microstructure, phase stability and mechanical properties of 8 mol% yttria stabilized zirconia (8YSZ) was studied. 8YSZ with La2O3 (9, 12 and 15 wt%) ceramics were fabricated by microwave and conventional sintering at 1400 °C/ 20 min and 1400 °C/ 5 h, respectively. Irrespective of the sintering technique, the relative sintered density was found to decrease with increasing amount of La2O3. The grain growth of 8YSZ was enhanced significantly by the addition of La2O3. The XRD results demonstrated that addition of La2O3 up to 15 wt% did not disrupt the cubic 8YSZ phase regardless of sintering technique; additionally evolution of pyrochlore phase, La2Zr2O7 was observed in all sintered specimens. Vickers hardness of 8YSZ ceramic compacts were also found to decrease with increasing amount of La2O3.",

author = "A. Muthuchamy and Nidhi Nagaraju and Agrawal, {Dinesh K.} and Annamalai, {A. Raja}",

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year = "2019",

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doi = "10.1016/j.ceramint.2018.11.028",

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T1 - Effect of La2O3 addition and sintering mode on the mechanical properties and microstructural evolution on an 8YSZ ceramic alloy

AU - Muthuchamy, A.

AU - Nagaraju, Nidhi

AU - Agrawal, Dinesh K.

AU - Annamalai, A. Raja

PY - 2019/2/15

Y1 - 2019/2/15

N2 - In this research, the influence of La2O3 addition on the microstructure, phase stability and mechanical properties of 8 mol% yttria stabilized zirconia (8YSZ) was studied. 8YSZ with La2O3 (9, 12 and 15 wt%) ceramics were fabricated by microwave and conventional sintering at 1400 °C/ 20 min and 1400 °C/ 5 h, respectively. Irrespective of the sintering technique, the relative sintered density was found to decrease with increasing amount of La2O3. The grain growth of 8YSZ was enhanced significantly by the addition of La2O3. The XRD results demonstrated that addition of La2O3 up to 15 wt% did not disrupt the cubic 8YSZ phase regardless of sintering technique; additionally evolution of pyrochlore phase, La2Zr2O7 was observed in all sintered specimens. Vickers hardness of 8YSZ ceramic compacts were also found to decrease with increasing amount of La2O3.

AB - In this research, the influence of La2O3 addition on the microstructure, phase stability and mechanical properties of 8 mol% yttria stabilized zirconia (8YSZ) was studied. 8YSZ with La2O3 (9, 12 and 15 wt%) ceramics were fabricated by microwave and conventional sintering at 1400 °C/ 20 min and 1400 °C/ 5 h, respectively. Irrespective of the sintering technique, the relative sintered density was found to decrease with increasing amount of La2O3. The grain growth of 8YSZ was enhanced significantly by the addition of La2O3. The XRD results demonstrated that addition of La2O3 up to 15 wt% did not disrupt the cubic 8YSZ phase regardless of sintering technique; additionally evolution of pyrochlore phase, La2Zr2O7 was observed in all sintered specimens. Vickers hardness of 8YSZ ceramic compacts were also found to decrease with increasing amount of La2O3.

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JO - Ceramics International

JF - Ceramics International

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Effect of La₂O₃ addition and sintering mode on the mechanical properties and microstructural evolution on an 8YSZ ceramic alloy

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