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Materials Behavior under Compression

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (20 September 2022) | Viewed by 13205

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Dr. Yu Lin

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Guest Editor

SLAC National Accelerator Laboratory, Menlo Park, CA, USA
Interests: diamond anvil cell; analytical probes at high pressure; X-ray characterization; complex hybrid systems; carbon-based (nano)materials; hydrogen-rich materials

Special Issue Information

Pressure can induce dramatic changes in materials and give us a much broader field to search for new phases with enhanced properties. Pressure also serves as a smooth and clean tuning parameter that could improve our basic understanding of existing materials at different levels of atomic and molecular interactions. These materials can vary from crystalline to amorphous phases at macro–meso–nano scales and display different dimensionalities. The advent and development of the diamond anvil cell technology and concurrent breakthroughs in next-generation synchrotron, neutron, and laser facilities offer numerous opportunities to probe samples over a wide pressure–temperature space at the relevant energy, spatial, and temporal scales. The experimental approach and theoretical simulations alone or in combination have provided fruitful results for advancing the understanding on the key problems in high-pressure physics, chemistry, materials sciences, and geosciences. This is a prime time to be involved in the transformative science associated with the pressure dimension.

Dr. Yu Lin
Guest Editor

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Keywords

static compression
dynamic compression
complex hybrid systems
glasses
superhard materials
high-pressure characterization
hydrogen-bearing systems
low-dimensional materials
high-pressure apparatus (diamond anvil cell, large volume apparatus, etc)

Published Papers (6 papers)

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Research

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10 pages, 1220 KiB

Open AccessArticle

Thermal Conductivity of Helium and Argon at High Pressure and High Temperature

by Wen-Pin Hsieh, Yi-Chi Tsao and Chun-Hung Lin

Materials 2022, 15(19), 6681; https://doi.org/10.3390/ma15196681 - 26 Sep 2022

Cited by 2 | Viewed by 1618

Abstract

Helium (He) and argon (Ar) are important rare gases and pressure media used in diamond-anvil cell (DAC) experiments. Their thermal conductivity at high pressure–temperature (P-T) conditions is a crucial parameter for modeling heat conduction and temperature distribution within a DAC. Here we report the thermal conductivity of He and Ar over a wide range of high P-T conditions using ultrafast time-domain thermoreflectance coupled with an externally heated DAC. We find that at room temperature the thermal conductivity of liquid and solid He shows a pressure dependence of P^0.86 and P^0.72, respectively; upon heating the liquid, He at 10.2 GPa follows a T^0.45 dependence. By contrast, the thermal conductivity of solid Ar at room temperature has a pressure dependence of P^1.25, while a T^−1.37 dependence is observed for solid Ar at 19 GPa. Our results not only provide crucial bases for further investigation into the physical mechanisms of heat transport in He and Ar under extremes, but also substantially improve the accuracy of modeling the temperature profile within a DAC loaded with He or Ar. The P-T dependences of the thermal conductivity of He are important to better model and constrain the structural and thermal evolution of gas giant planets containing He. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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9 pages, 3315 KiB

Open AccessArticle

Pressure-Enhanced Photocurrent in One-Dimensional SbSI via Lone-Pair Electron Reconfiguration

by Tianbiao Liu, Kejun Bu, Qian Zhang, Peijie Zhang, Songhao Guo, Jiayuan Liang, Bihan Wang, Haiyan Zheng, Yonggang Wang, Wenge Yang and Xujie Lü

Materials 2022, 15(11), 3845; https://doi.org/10.3390/ma15113845 - 27 May 2022

Cited by 4 | Viewed by 1851

Abstract

Understanding the relationships between the local structures and physical properties of low-dimensional ferroelectrics is of both fundamental and practical importance. Here, pressure-induced enhancement in the photocurrent of SbSI is observed by using pressure to regulate the lone-pair electrons (LPEs). The reconfiguration of LPEs under pressure leads to the inversion symmetry broken in the crystal structure and an optimum bandgap according to the Shockley–Queisser limit. The increased polarization caused by the stereochemical expression of LPEs results in a significantly enhanced photocurrent at 14 GPa. Our research enriches the foundational understanding of structure–property relationships by regulating the stereochemical role of LPEs and offers a distinctive approach to the design of ferroelectric-photovoltaic materials. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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11 pages, 5172 KiB

Open AccessArticle

High-Entropy Borides under Extreme Environment of Pressures and Temperatures

by Seth Iwan, Chia-Min Lin, Christopher Perreault, Kallol Chakrabarty, Cheng-Chien Chen, Yogesh Vohra, Rostislav Hrubiak, Guoyin Shen and Nenad Velisavljevic

Materials 2022, 15(9), 3239; https://doi.org/10.3390/ma15093239 - 30 Apr 2022

Cited by 9 | Viewed by 2003

Abstract

The high-entropy transition metal borides containing a random distribution of five or more constituent metallic elements offer novel opportunities in designing materials that show crystalline phase stability, high strength, and thermal oxidation resistance under extreme conditions. We present a comprehensive theoretical and experimental investigation of prototypical high-entropy boride (HEB) materials such as (Hf, Mo, Nb, Ta, Ti)B₂ and (Hf, Mo, Nb, Ta, Zr)B₂ under extreme environments of pressures and temperatures. The theoretical tools include modeling elastic properties by special quasi-random structures that predict a bulk modulus of 288 GPa and a shear modulus of 215 GPa at ambient conditions. HEB samples were synthesized under high pressures and high temperatures and studied to 9.5 GPa and 2273 K in a large-volume pressure cell. The thermal equation of state measurement yielded a bulk modulus of 276 GPa, in excellent agreement with theory. The measured compressive yield strength by radial X-ray diffraction technique in a diamond anvil cell was 28 GPa at a pressure of 65 GPa, which is a significant fraction of the shear modulus at high pressures. The high compressive strength and phase stability of this material under high pressures and high temperatures make it an ideal candidate for application as a structural material in nuclear and aerospace fields. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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11 pages, 2911 KiB

Open AccessArticle

Experimental and Computational Studies of Compression and Deformation Behavior of Hafnium Diboride to 208 GPa

by Kaleb Burrage, Chia-Min Lin, Cheng-Chien Chen and Yogesh K. Vohra

Materials 2022, 15(8), 2762; https://doi.org/10.3390/ma15082762 - 9 Apr 2022

Cited by 2 | Viewed by 1378

Abstract

The compression behavior of the hexagonal AlB₂ phase of Hafnium Diboride (HfB₂) was studied in a diamond anvil cell to a pressure of 208 GPa by axial X-ray diffraction employing platinum as an internal pressure standard. The deformation behavior of HfB₂ was studied by radial X-ray diffraction technique to 50 GPa, which allows for measurement of maximum differential stress or compressive yield strength at high pressures. The hydrostatic compression curve deduced from radial X-ray diffraction measurements yielded an ambient-pressure volume V₀ = 29.73 Å3/atom and a bulk modulus K₀ = 282 GPa. Density functional theory calculations showed ambient-pressure volume V₀ = 29.84 Å3/atom and bulk modulus K₀ = 262 GPa, which are in good agreement with the hydrostatic experimental values. The measured compressive yield strength approaches 3% of the shear modulus at a pressure of 50 GPa. The theoretical strain-stress calculation shows a maximum shear stress τ_max~39 GPa along the (1−10) [110] direction of the hexagonal lattice of HfB₂, which thereby can be an incompressible high strength material for extreme-environment applications. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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9 pages, 433 KiB

Open AccessEditor’s ChoiceArticle

High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide

by Mungo Frost, John D. Lazarz, Abraham L. Levitan, Vitali B. Prakapenka, Peihao Sun, Sergey N. Tkachev, Hong Yang, Siegfried H. Glenzer and Arianna E. Gleason

Materials 2021, 14(13), 3683; https://doi.org/10.3390/ma14133683 - 1 Jul 2021

Cited by 1 | Viewed by 2187

Abstract

Simultaneous high-pressure Brillouin spectroscopy and powder X-ray diffraction of cerium dioxide powders are presented at room temperature to a pressure of 45 GPa. Micro- and nanocrystalline powders are studied and the density, acoustic velocities and elastic moduli determined. In contrast to recent reports of anomalous compressibility and strength in nanocrystalline cerium dioxide, the acoustic velocities are found to be insensitive to grain size and enhanced strength is not observed in nanocrystalline CeO

_{2}

. Discrepancies in the bulk moduli derived from Brillouin and powder X-ray diffraction studies suggest that the properties of CeO

_{2}

are sensitive to the hydrostaticity of its environment. Our Brillouin data give the shear modulus,

G_{0}

= 63 (3) GPa, and adiabatic bulk modulus,

K_{S 0}

= 142 (9) GPa, which is considerably lower than the isothermal bulk modulus,

K_{T 0} \sim

230 GPa, determined by high-pressure X-ray diffraction experiments. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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Review

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13 pages, 3524 KiB

Open AccessReview

Future Study of Dense Superconducting Hydrides at High Pressure

by Dong Wang, Yang Ding and Ho-Kwang Mao

Materials 2021, 14(24), 7563; https://doi.org/10.3390/ma14247563 - 9 Dec 2021

Cited by 22 | Viewed by 3186

Abstract

The discovery of a record high superconducting transition temperature (T_c) of 288 K in a pressurized hydride inspires new hope to realize ambient-condition superconductivity. Here, we give a perspective on the theoretical and experimental studies of hydride superconductivity. Predictions based on the BCS–Eliashberg–Midgal theory with the aid of density functional theory have been playing a leading role in the research and guiding the experimental realizations. To date, about twenty hydrides experiments have been reported to exhibit high-T_c superconductivity and their T_c agree well with the predicted values. However, there are still some controversies existing between the predictions and experiments, such as no significant transition temperature broadening observed in the magnetic field, the experimental electron-phonon coupling beyond the Eliashberg–Midgal limit, and the energy dependence of density of states around the Fermi level. To investigate these controversies and the origin of the highest T_c in hydrides, key experiments are required to determine the structure, bonding, and vibrational properties associated with H atoms in these hydrides. Full article

(This article belongs to the Special Issue Materials Behavior under Compression)

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