A review of irradiation stability of lithium hydride neutron shielding material

Wang, Weizong; Li, Q.; Xia, Yang; Le, Guomin

doi:10.1179/1743284715y.0000000105

Cited by 18 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, a niche application that has been evidenced recently is the use of hydrides for radiation shielding in space [401,402], which should be considered and investigated for complex hydrides too.…”

Section: New Trends and Propertiesmentioning

confidence: 99%

Hydrogen storage in complex hydrides: past activities and new trends

et al. 2022

View full text Add to dashboard Cite

Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over the past decades. A focus was dedicated to the determination of their thermodynamic and hydrogen storage properties, due to their high gravimetric and volumetric hydrogen storage capacities, but their application has been limited because of harsh working conditions for reversible hydrogen release and uptake. The present review aims at appraising the recent advances on different complex hydride systems, coming from the proficient collaborative activities in the past years from the research groups led by the experts of the Task 40 “Energy Storage and Conversion Based on Hydrogen” of the Hydrogen Technology Collaboration Programme of the International Energy Agency. An overview of materials design, synthesis, tailoring and modelling approaches, hydrogen release and uptake mechanisms and thermodynamic aspects are reviewed to define new trends and suggest new possible applications for these highly tuneable materials.

show abstract

Section: New Trends and Propertiesmentioning

confidence: 99%

Hydrogen storage in complex hydrides: past activities and new trends

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Lithium hydride (LiH) is one of the most important nuclear materials and has gained much attention because of its low density, high thermal neutron absorption and scattering cross-section, high hydrogen capacity and no obvious secondary irradiation after neutron absorption. Based on its advantages, LiH can be used as a neutron moderator/absorbent and is considered to be the best neutron shielding material for space nuclear reactors [1][2][3][4][5][6]. However, due to the low strength, high brittleness and thermal expansion of LiH, it is susceptible to thermal-mechanical loading during production and service conditions, causing defects and cracks [1,2,7].…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect on Short—Term Strength of Lithium Hydride with Tensile and Three—Point Bend Specimens

et al. 2022

View full text Add to dashboard Cite

Strength is one important mechanical property of lithium hydride (LiH) for application as a neutron moderator and absorbent at elevated temperatures. Using the digital image correlation (DIC) method for deformation measurement, the short—term strength of LiH was investigated with both tensile and three—point bend (3PB) specimens in the range of room temperature (RT) to 600 °C. The results show that the temperature dependence of the strength from tensile and 3PB tests shows similarity. As the temperature increases, the strength changes slightly, then rises to the maximum and finally decreases due to the softening effect. The fracture surfaces of specimens show the main characteristics of trans—granular fracture at different temperatures, except for 600 °C. With increasing temperature, the fracture surfaces become rough and numerous tortuous micro—cracks are found. Especially for 3PB specimens, there are dimple—like structures with distorted grains and obvious intergranular cleavage fracture.

show abstract

“…Lithium hydride (LiH), one of the most important ceramic materials in nuclear engineering, is an ideal material for neutron shielding and moderating due to the combination of a high absorption cross-section, high hydrogen density and high melting point (~683 • C) [1][2][3][4][5]. As a special ceramic which has an easy deliquescence and combustion in air at room temperature [6,7], LiH ceramic might have complex properties at a high temperature.…”

Section: Introductionmentioning

confidence: 99%

In Situ Evolution of Pores in Lithium Hydride at Elevated Temperatures Characterized by X-ray Computed Tomography

et al. 2021

View full text Add to dashboard Cite

The evolution of defects such as pores at elevated temperatures is crucial for revealing the thermal stability of lithium hydride ceramic. The in situ evolution of pores in sintered lithium hydride ceramic from 25 °C to 500 °C, such as the statistics of pores and the 3D structure of pores, was investigated by X-ray computed tomography. Based on the statistics of pores, the porosity significantly increased from 25 °C to 200 °C and decreased after 200 °C, due to the significant change in the number and total volume of the round-shaped pores and the branched crack-like pores with an increasing temperature. According to the 3D structure of pores, the positions of pores did not change, and the sizes of pores went up in the range of 25–200 °C and went down after 200 °C. Some small round-shaped pores with an Equivalent Diameter of less than 9 μm appeared at 200 °C and disappeared at elevated temperatures. Some adjacent pores of all types connected at 200 °C, and some branched crack-like pores gradually disconnected with an increasing temperature. The expansion of pores at 200 °C caused by the release of residual hydrogen and the contraction of pores after 200 °C because of the migration and diffusion of some hydrogen in pores might be the reason for the evolution of pores with an increasing temperature.

show abstract

A review of irradiation stability of lithium hydride neutron shielding material

Cited by 18 publications

References 40 publications

Hydrogen storage in complex hydrides: past activities and new trends

Hydrogen storage in complex hydrides: past activities and new trends

Temperature Effect on Short—Term Strength of Lithium Hydride with Tensile and Three—Point Bend Specimens

In Situ Evolution of Pores in Lithium Hydride at Elevated Temperatures Characterized by X-ray Computed Tomography

Contact Info

Product

Resources

About