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Showing 1 to 13 of 13 for “"particle fracture"”.
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Measuring the fracture energy of bed breakage using a short impact load cell
Particle fracture is the elementary process that governs comminution. In industrial machines particle breakage occurs mainly through three mechanisms: impact, abrasion and attrition. Of these mechanisms, impact breakage is known to be the most basic form of particle size reduction. Comminution …
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Acoustic emission signal analysis
… level, acoustic emission caused by brittle particle fracture in 7039 aluminum could be differentiated from acoustic emission caused by the discontinuous movement of a crack in 4340 steel. Detailed descriptions of acoustic emission source modeling, transducer operating principles, calibration …
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Analytical model for force prediction when machining metal matrix composites
… hard and abrasive nature of the reinforcement particles is responsible for rapid tool wear and high machining costs. Fracture and debonding of the abrasive reinforcement particles are the considerable damage modes that directly influence the tool performance. It is very important to find highly …
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Mitigating material supply risks: evaluation of abrasion specific comminution for commercial recovery of indium from waste liquid crystal displays
… of LCD screens at scale. A model based on particle properties and morphology, scrubber geometry and agitation rate, and single particle fracture behavior was developed capable of successfully predicting power consumption, indium concentrate quantity and quality, and the attrition scrubber …
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Three dimensional characterization of failure evolution of tin and silicon in lithium ion battery electrodes
… by significant volume expansion, resulting in particle fracture and subsequent loss of functionality. In this work, the utilization of Sn and Si as high capacity alternate host materials in the form of particles within composite electrodes or wire was investigated in Li-ion batteries. …
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Measurement of impact breakage properties of ore particles using a series of devices
Single particle impact breakage experiments provide essential data to aid in the fundamental understanding of rock fracture in comminution. Such experiments, conducted using devices such as the drop weight tester, split Hopkinson bars and more recently the rotary breakage tester, have been …
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Operando Optical Tracking of Ion Dynamics and Degradation in Battery Electrodes
… lithium-ion dynamics in individual active particles, under operating conditions. First we apply this technique to follow cycling of the archetypical cathode material LiCoO₂ (LCO). We visualise the insulator-metal, solid solution and lithium ordering phase transitions directly, determine …
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Microstructural evolution during hot deformation of the 6061 aluminium alloy based Al₂O₃ metal matrix composites
… the average angle between the maximum cluster or particle dimension and the matrix flow direction was measured as 21 and 30 degrees respectively. No particle fracture, particle debonding or de-clustering was observed.
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Micromechanistic analysis of fatigue in aluminium silicon casting alloys
… α-aluminium as the matrix with silicon particles and several intermetallic phases. Previous research on Al-Si casting alloys has demonstrated that porosity is detrimental to fatigue life as cracks initiate freely at pores. However, with improved casting techniques porosity can be greatly …
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Ultrasound-assisted synthesis and processing of carbon materials
… 800 m2/g and up to 10 wt% Fe incorporated as nanoparticles < 20 nm in diameter. Fe-C was used as a catalyst to reduce aqueous hexavalent chromium, which demonstrated the accessibility of the iron nanoparticles despite the fact that they are likely encapsulated in the porous carbon support. Part …
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Geometry-Dependent Fracture and Rebound of Particulate under Compressor-Relevant Impact Conditions
… to damage when they ingest small solid particles like sand, dust, or volcanic ash. Once inside, these particles collide with engine blades at very high speeds, where they may bounce, stick, or break apart. Each of these outcomes affects how particles travel through the engine and, in …
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Microstructural evolution and mechanical behavior in nickel based alloys for very high temperature reactor
… decrease in material strength. Consequently, the fracture mechanisms changed from inclusion particle cracks at temperatures up to 700ºC to triple junction cracks from 800 to 1000ºC. Through a strain-rate sensitivity analysis, the results of tensile tests were extended to approximate the alloys’ …
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Dynamic Loading of Structures by High Speed Granular Media
… are performed using a combination of discrete particle and finite element schemes, which enables the analysis of the fully coupled interaction between the flowing granular media and the structure. A contact model involving multiple parameters is used for inter-particle and particle-target …