Effects of MgO addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with CeO2 (ZTA–CeO2) ceramic composite

Rejab, Nik Akmar; Azhar, Ahmad Zahirani Ahmad; Kian, Khoo Seng; Ratnam, Mani Maran; Ahmad, Zainal Arifin

doi:10.1016/j.msea.2013.11.091

Cited by 49 publications

(17 citation statements)

References 34 publications

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“…Alumina (Al 2 O 3 ) ceramics have high hardness, good wear resistance and high temperature stability. Rao et al (2003) revealed that Al 2 O 3 ceramics has been widely used for structural ceramics application similar results were reported recently (Rejab et al, 2014). In spite of the variety of useful physical properties of sintered oxide ceramics based on chemically and thermally stable alpha modification of alumina (α-Al 2 O 3 ) their application as cutting tool inserts working under mechanical loads and thermal shock conditions is limited due to their brittleness and low strength.…”

Section: Introductionsupporting

confidence: 62%

“…The XRD patterns for CS samples showed a similar trend compared to TS samples. However, the addition of MgO to Al 2 O 3 can reduce grain size but more MgO additive led to the formation of MgAl 2 O 4 phase confirmed with Rejab et al (2014). The XRD patterns in NS samples and TS samples were observed MgAl 2 O 4 phases tend to increase with increasing Y 2 O 3 contents.…”

Section: Resultsmentioning

confidence: 67%

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Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Rittidech¹,

Wisuwan²,

Pinkhunthod³

2018

American Journal of Applied Sciences

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The purposes of this research are to prepare and investigate the characterization of 0.7MgO-xY 2 O 3-(99.3-x)Al 2 O 3 by varies x at 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 wt% (AMY). AMY samples were synthesized by solid state reaction under two different sintering methods conventional sintering method (NS) and two stage sintering method (TS). Ceramic samples were sintered by conventional sintering at 1600°C for 5 h and using two stage sintering with the first sintering temperature (T 1) at 1600°C for 30 min and cooling down to the second sintering temperature (T 2) at 1450°C for 10 h. The phase composition of the samples were characterized using XRD technique. XRD patterns from two method sintering revealed phase combination of Al 2 O 3 , MgAl 2 O 4 , MgO and Y 2 O 3. It was found that it is not different XRD patterns from two method sintering. SEM micrographs form NM and TS showed that the shape of the ceramic grains were polyhedron and ellipsoid, while the grain sizes form NS were in the range of 0.91-1.00 µm and the grain sizes from TS were in the range of 0.34-0.48 µm. The samples from NS and TS is showed optimum mechanical properties by AMY with Y 2 O 3 additions between 4-6 wt%.

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Section: Introductionsupporting

confidence: 62%

Section: Resultsmentioning

confidence: 67%

Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Rittidech¹,

Wisuwan²,

Pinkhunthod³

2018

American Journal of Applied Sciences

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“…The authors' previous works investigated MgO, Cr 2 O 3 , CeO 2 and CaCO 3 for improving the mechanical properties of ZTA without diminishing properties of ZTA [3][4][5][6]16,17]. The current research has been done to understand the role of TiO 2 in ZTA ceramic composites.…”

Section: Introductionmentioning

confidence: 99%

Effects of TiO2 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina ceramic composite

Manshor

Aris

Azhar

et al. 2015

Ceramics International

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“…Majority of the reported ZTA formulations use the mechanical mixing of yttria stabilized t ‐ZrO 2 (YSZ) and α ‐Al 2 O 3 , Studies implied the good structural stability demonstrated by α ‐Al 2 O 3 component while a gradual t ‐ → m ‐ZrO 2 phase transition is apparent in ZTA under the aggressive hydrothermal/ in vivo conditions . In the present study, pristine ZTA synthesized devoid of Y 3+ preserved t ‐ZrO 2 until 1100°C, which is manifested by the excess amorphous Al 2 O 3 that prefer to engulf ZrO 2 grains thus preventing its size growth.…”

Section: Discussionmentioning

confidence: 55%

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Ponnilavan

Kannan

2018

J Biomed Mater Res

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The structural and optical features of zirconia toughened alumina (ZTA) due to the assorted range of Eu 3+ substitutions are demonstrated. The characterization studies affirm the pivotal role of Eu 3+ on the improved structural stability of ZTA and associated tetragonal zirconia (t-ZrO 2 ) ! cubic zirconia (c-ZrO 2 ) transformation. Eu 3+ prefers accommodation at the lattice sites of ZrO 2 and their gradual accumulation induces t-! c-ZrO 2 transition. Beyond the substitution limit, Eu 3+ reacts with Al 2 O 3 to form EuAlO 3 . Optical studies validate typical Eu 3+ emissions, and further, the emission spectrum also predicts the symmetry of Eu 3+ coordination at the ZrO 2 lattice. Uniform distribution of ZrO 2 and Al 2 O 3 grains throughout the microstructures are evident from the morphological analysis. Further, the influence of Eu 3+ on the enhanced mechanical stability of ZTA is ensured from indentation technique.

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Effects of MgO addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with CeO2 (ZTA–CeO2) ceramic composite

Cited by 49 publications

References 34 publications

Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Effects of TiO2 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina ceramic composite

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

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Effects of MgO addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with CeO2 (ZTA–CeO2) ceramic composite

Cited by 49 publications

References 34 publications

Effect of Y2O3 Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Effect of Y2O3 Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Effects of TiO2 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina ceramic composite

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

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Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics

Effect of Y₂O₃ Additions on Microstructure and Properties of Alumina–Magnesia Ceramics