At low-temperature and high-stress conditions, quartz deformation is controlled by the kinetics of dislocation glide, that is, low-temperature plasticity (LTP). To investigate the relationship between intracrystalline HO content and the yield strength of quartz LTP, we have integrated spherical and Berkovich nanoindentation tests at room temperature on natural quartz with electron backscatter diffraction and secondary-ion mass spectrometry measurements of intracrystalline HO content. Dry (<20 wt ppm HO) and wet (20-100 wt ppm HO) crystals exhibit comparable indentation hardness. Quartz yield strength, which is proportional to indentation hardness, seems to be unaffected by the intracrystalline HO content when deformed under room temperature, high-stress conditions. Pre-indentation intracrystalline microstructure may have provided a high density of dislocation sources, influencing the first increments of low-temperature plastic strains. Our results have implications for fault strength at the frictional-viscous transition and during transient deformation by LTP, such as seismogenic loading and post-seismic creep.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286563 | PMC |
| http://dx.doi.org/10.1029/2021GL094633 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
High-Rate 4.2 V Solid-State Potassium Batteries by In Situ Polymerized Epoxide Ether Electrolyte.
Nano Lett
January 2025
College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology of Clean Energy, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China.
Solid-state metallic potassium batteries (SSMPBs) afresh have attracted incremental attention because of their potential to supplement solid-state metallic lithium batteries. However, SSMPBs suffer poor electrochemical performances due to the low ionic conductivity of solid electrolytes and huge electrode/electrolyte interfacial resistance. Herein, high-rate SSMPBs are achieved by in situ ring-opening polymerization of 1,3-dioxolane with succinonitrile as a plasticizer and Al(OTf) as the catalyst, where the succinonitrile enables short-chain polyether electrolytes.
View Article and Find Full Text PDFHelical dislocation-driven plasticity and flexible high-performance thermoelectric generator in α-MgBi single crystals.
Nat Commun
January 2025
Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China.
Inorganic plastic semiconductors play a crucial role in the realm of flexible electronics. In this study, we present a cost-effective plastic thermoelectric semimetal magnesium bismuthide (α-MgBi), exhibiting remarkable thermoelectric performance. Bulk single-crystalline α-MgBi exhibits considerable plastic deformation at room temperature, allowing for the fabrication of intricate shapes such as the letters "SUSTECH" and a flexible chain.
View Article and Find Full Text PDFSkin-Mountable Thermo-responsive Structured Hydrogel for Optical and Adhesion Coupled Functional Sensing.
Small
January 2025
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Smart hydrogel sensors with intrinsic responsiveness, such as pH, temperature, humidity, and other external stimuli, possess broad applications in innumerable fields such as biomedical diagnosis, environmental monitoring, and wearable electronics. However, it remains a great challenge to develop wearable structural hydrogels that possess simultaneously body temperature-responsive, adhesion-adaptable, and transparency-tunable. Herein, an innovative skin-mountable thermo-responsive hydrogel is fabricated, which endows tunable optical properties and switchable adhesion properties at different temperatures.
View Article and Find Full Text PDFImpact of saline irrigation on the early mechanical characteristics and microstructure of bone cement.
Sci Rep
December 2024
Student Research Committee, Department of Epidemiology, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Very high heat is generated during the polymerization of poly (methyl methacrylate) (PMMA) bone cement, which is used for implant fixation in orthopedic surgery. As such, it has been suggested that irrigating the bone cement layer in the surgical site with a saline solution is a way of cooling the layer. In this study, we aimed to determine the influence of irrigation with a saline solution on the flexural strength and the microstructure of the test specimens of two PMMA bone cement brands: Simplex P and FIX 1.
View Article and Find Full Text PDFCorrection method of Mohr-Coulomb strength criterion for rock based on freeze-thaw and residual effects.
Sci Rep
December 2024
Department of Mechanics, Xi'an University of Science and Technology, Xi'an, 710054, China.
Under confining pressure, rocks transition from brittle failure to plastic failure, and residual strength exists after complete failure. However, in the process of establishing rock damage constitutive models, the strength criteria used usually do not consider residual stress. In cold region engineering, the freeze-thaw effect caused by temperature changes should be considered in the constitutive model, and strength criteria should also be introduced.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!