Thermodynamic properties of zirconium-oxygen solid solution and its deoxidation in calcium chloride molten salt

Ma, Zhaohui; Zhang, Jiandong; Yan, Guoqing; Liu, Hai; Huang, Jingcun; Wang, Lijun

doi:10.1016/j.jallcom.2019.151964

Cited by 5 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The formula for the reduction product can mean that the obtained powder is one of the mixtures: Zr 2 O 3 41,42 and Li 2 O; ZrO and Li 2 ZrO 3 ; Zr, zirconium oxides and lithium zirconates.…”

Section: Resultsmentioning

confidence: 99%

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing

Nikolaev

Suzdaltsev

Pavlenko

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

Reduction of ZrO 2 by lithium during electrolysis of LiCl-KCl-Li 2 O melt at 650°C was studied using a set of physicochemical methods of analysis. Influence of ZrO 2 in the space near a molybdenum cathode on the kinetics of the cathode process was established. Possible variations of the electrode reaction associated with the zirconium reduction were proposed. The appearance of ZrO 2 in the cathode space resulted in consumption of reduced lithium and in increase in the potential relaxation time of the molybdenum cathode after cathode polarization. Long-term galvanic impulse electrolysis of LiCl-KCl-Li 2 O melt at 650°C was carried out using the molybdenum cathode which was immersed into the ZrO 2 powder. According to the X-ray fluorescence analysis as well as the method of nuclear reactions the reduction product was presented by the ZrO 2 , Li 2 ZrO 3 , Zr 3 O phases. Additionally, by alloying the reduction product with tin, the ZrO 2 reduction degree to metallic zirconium was estimated, which was close to zero. It was assumed that the main pathway for the appearance of the metallic zirconium in the ZrO 2 reduction product during electrolysis of the LiCl-KCl-Li 2 O melt was direct electroreduction of dissolved zirconium in the melt.

show abstract

Section: Resultsmentioning

confidence: 99%

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing

Nikolaev

Suzdaltsev

Pavlenko

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…It is an active metal that reacts with atmospheric oxygen, water, and acids, but the exposed layer of metallic zirconium is immediately covered with a layer of amphoteric zirconium oxide. Zirconium ions have a high affinity for oxide anions [29], creating a layer that is insoluble by most etching substances.…”

Section: Introductionmentioning

confidence: 99%

Zirconium Surface Treatment via Chemical Etching

Gołasz,

Kołkowska,

Zieliński

et al. 2023

Materials

View full text Add to dashboard Cite

The increased demand for implants that do not pose a threat to patients diagnosed using high-resolution magnetic resonance imaging and concerns arising from titanium allergies require the development of alternative implant materials. One promising concept is a use of zirconium as corrosion-resistant, nontoxic material that is lower in magnetic susceptibility. To achieve this, safe and efficient surface treatment methods of zirconium metal have to be developed. In this study, zirconium samples were treated with fluoride-free and fluoride-containing etching mixtures to determine their effect on the surface of Zr. SEM images were taken to investigate the preliminary effects of the etchants. Then, a second set of experiments was carried out using mixtures of HF-H2SO4 and ammonium persulfate–fluoride salts, as they gave the most promising results in the first trial. SEM images were taken and measurements on roughness, wettability, and atomic composition were made. The results showed an even zirconium surface in APS-fluoride salts, along with the formation of pits (1–3 μm) similar to those found in commercially available implants. There was no significant increase in the roughness of the treated samples. The addition of NO3− ions in the form of KNO3 speeded up etching and promoted pit formation. The HF-H2SO4 mixture was found to give unsatisfying results, as the surface was too rough and the formed pits were too large. It was concluded that etching zirconium in ammonium persulfate and fluoride salts is a promising area of research for the preparation of zirconium implants; however, further research has to be carried out on sandblasted samples.

show abstract

Comprehensive numerical investigation of laser powder bed fusion process conditions for bulk metallic glasses

Yang,

Markl,

Körner

2024

Additive Manufacturing

View full text Add to dashboard Cite

Thermodynamic properties of zirconium-oxygen solid solution and its deoxidation in calcium chloride molten salt

Cited by 5 publications

References 45 publications

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing

Zirconium Surface Treatment via Chemical Etching

Comprehensive numerical investigation of laser powder bed fusion process conditions for bulk metallic glasses

Contact Info

Product

Resources

About

Thermodynamic properties of zirconium-oxygen solid solution and its deoxidation in calcium chloride molten salt

Cited by 5 publications

References 45 publications

Reduction of ZrO2 during SNF Pyrochemical Reprocessing

Reduction of ZrO2 during SNF Pyrochemical Reprocessing

Zirconium Surface Treatment via Chemical Etching

Comprehensive numerical investigation of laser powder bed fusion process conditions for bulk metallic glasses

Contact Info

Product

Resources

About

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing

Reduction of ZrO₂ during SNF Pyrochemical Reprocessing