Effects of pressure on the phase transformations and mechanical properties of 10 mol% Mg-PSZ sintered by HPHT

Wang, Jian; Wang, Zhiwen; Yong-kui, Wang; Ma, Hongan; Fang, Shuai; Chen, Qi; Wang, Yao; Wang, Chunxiao; Chen, Liangchao; Jia, Xiaopeng

doi:10.1039/d1ce01544c

Cited by 1 publication

(2 citation statements)

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“…ZrO 2 has a high level of chemical stability due to the oxygen‐zirconium bond strength, which is comparable to that of silicon oxide. While silicon oxide has an oxygen coordination number of 4, ZrO 2 has an oxygen coordination number of more than 7 22 . A related study showed that ZrO 2 was able to maintain its stability for up to 3 h after being submerged in a solution of extremely concentrated NaOH 23 .…”

Section: Introductionmentioning

confidence: 99%

“…While silicon oxide has an oxygen coordination number of 4, ZrO 2 has an oxygen coordination number of more than 7. 22 A related study showed that ZrO 2 was able to maintain its stability for up to 3 h after being submerged in a solution of extremely concentrated NaOH. 23 The high melting point, corrosion resistance, and wear resistance of ZrO 2 have resulted in its wide use in various material fields such as ceramics, solid battery materials, catalytic materials, and adsorbent materials.…”

Section: Introductionmentioning

confidence: 99%

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Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Ge,

Xu,

Liao

et al. 2023

J Am Ceram Soc.

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Multiphase ceramics have a high application potential in the field of nuclear waste immobilization because of the efficient synergy between the individual phases. In this work, zirconia/garnet multiphase ceramics with high efficient and effective immobilization capacity of trivalent actinides were successfully prepared using conventional solid‐phase sintering. ZrO2 doping increases the lattice site available for nuclide substitution and advance the immobilization capacity of the ceramic substrate for nuclide. At the same time, the phase change of zirconia is used to tougher and improve the physical properties of the ceramic waste form. The feasibility of using multiphase ceramics for the efficient immobilization of trivalent actinides was assessed by studying the phase evolution, microstructure, Vickers hardness, and chemical stability of the multi‐phase ceramics. Zr1‐xNdxO2‐x/2/Ca3‐yNdyZr3‐yFey‐1Fe3O12 multiphase ceramics exhibited superior physical or chemical properties compared to most of the multiphase ceramics as well as the previously prepared single‐phase calcium garnet ceramic waste forms. The Vickers hardness of all the multiphase ceramic samples ranged between 685 and 730 HV0.5. Under the condition of using simulate Bei Shan groundwater as leaching agent, the normalized leaching rates of Nd is approximately 10−6 g·m−2·day−1, showing good chemical stability and achieving efficient and effective immobilization of trivalent actinides. The excellent chemical, as well as physical properties of Zr1‐xNdxO2‐x/2/Ca3‐yNdyZr3‐yFey‐1Fe3O12 multiphase ceramics are expected to make them one of the substrates for more efficient and effective immobilizing of trivalent actinides.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Ge,

Xu,

Liao

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

Effects of pressure on the phase transformations and mechanical properties of 10 mol% Mg-PSZ sintered by HPHT

Abstract: MgO (10 mol%)-stabilized zirconia ceramics were obtained using high-pressure high-temperature (HPHT) sintering. The effects of the sintering pressure (2.5, 3.7, and 5.0 GPa) on the phase transformations and hardness were...

Cited by 1 publication

References 40 publications

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

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