Results 31 to 40 of about 3,271 (259)
Applied Sciences, 2023 Button cutters are commonly used in hard rock drilling because the inserted carbide buttons provide exceptional wear resistance, impact resistance, and high strength in challenging geological formations.
Yanan Ma +4 more
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Colloidal Crack Sintering Lithography for Light‐Induced Patterning of Particle Assemblies
Advanced Functional Materials, EarlyView.Colloidal crack sintering lithography (CCSL) is a microfabrication technique that uses light‐induced photothermal heating to trigger sintering and controlled cracking in polymer colloidal assemblies. Local structural changes generate microchannels and patterns, enabling direct writing of diverse topographic motifs.
Marius Schoettle +2 more
wiley +1 more source
Mesoporous Carbon Thin Films with Large Mesopores as Model Material for Electrochemical Applications
Advanced Functional Materials, EarlyView.Mesoporous carbon thin films possessing 70 nm mesopores are prepared on titanium substrates by soft templating of resol resins with a self‐synthesized poly(ethylene oxide)‐block‐poly(hexyl acrylate) block copolymer. A strategy to avoid corrosion of the metal substrate is presented, and the films are extensively characterized in terms of morphology ...
Lysander Q. Wagner +9 more
wiley +1 more source
Numerical Simulation on Impact Crushing of Hard Rock by PDC Bit Based on Cohesive Element
Shiyou jixieThe rock of deep oil and gas reservoir has high hardness， and the drilling efficiency of PDC bit is low under conventional drilling mode. Impact drilling performs well in crushing hard rock， but the damage mechanism of PDC bit crushing hard rock under ...
Gao Feng +5 more
doaj +3 more sources
工程科学学报This study addresses the abnormal failures, such as blade fractures and wear, encountered by disc cutters when excavating hard rock with high uniaxial compressive strength.
Yong SHANG +5 more
doaj +1 more source
Alexandria Engineering Journal, 2021 There are some difficult problems in deep and ultra-deep oil and natural gas drilling process due to the complex stress environment and hard formation, such as slow drilling speed, well deviation and high cost.
Fushen Ren +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.The ultrahard teeth of mollusks that feed on rocky substrates contain a wear‐resistant coating on their surfaces consisting of densely packed mesocrystalline magnetic nanoparticles within an organic matrix. These coatings display significant hardness and toughness through their highly controlled mesocrystalline architectures.
Taifeng Wang +7 more
wiley +1 more source
Force calculation model of TBM disc cutter based on rock breaking mode
Meitan xuebao, 2023 The rock breaking force of the disc cutter is the core parameter for studying the efficiency and safety of TBM excavation in hard rock tunnels, the key to improve the accuracy of the calculation model is how to match the calculation model with the rock ...
Jiulei CAO +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley +1 more source
Applied Sciences, 2019 The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu +4 more
doaj +1 more source