Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Optics. Quantum optics --- Scanning electron microscopes --- 537.533.35 --- Scanning electron microscope --- Electron microscopes --- Electron microscopy --- 537.533.35 Electron microscopy --- Monograph

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The imminent challenge in geometallurgical characterization of today’s ore deposits is its inherent heterogeneity and complexity which demands fast, resource-efficient, robust, and cost-effective means of measurement and analysis. To address this concern, mining operations all over the world are incorporating SEM-based automated mineralogy systems. Next generation platforms have been developed to bring out these technologies from the laboratories unto the field for on-site mineralogical characterization. Its widespread use have established its significance in the mining industry, however, cross-validation of results between technologies has not been well studied. 
This study aims to compare and validate results gathered from two SEM platforms: the ZEISS SIGMA 300 Gemini (FEG) with the ZEISS MinSCAN (W-filament) both are coupled with the ZEISS Mineralogic Mining system. Three sets of mixed Cu ore samples (feed, concentrate, and tails) from the Kansanshi deposit were analyzed exploring the effects of SEM operating conditions and sample preparation. The work focused on comparison of the modal mineralogy. The quality of results were assessed by its repeatability and cross-validated with chemical assay (AR-AAS). The limitations of these SEM-based systems were defined and solutions were proposed involving correlative microscopy. The feasibility of employing machine learning algorithms in image classification techniques were proposed to improve data acquisition process and accuracy of results of automated mineralogy systems.
This study establishes the effect of the mineral recipe or SIP to the accuracy of results of a quantitative mineralogical analysis. Expertise in the deposit mineralogy as well as in the capabilities and limitations of the SEM is crucial in achieving reliable results. Cross-validation of back-calculated Mineralogic Cu and Fe grades from modal mineralogy with the measured AR-AAS chemical analysis shows that the error is minimized with the ZEISS SIGMA on samples prepared using carbon black. However, it must be noted that not all numerical values can be directly compared between the results and should be treated merely as indications of accuracy.
Combined features from images obtained from the optical microscope (RGB) and the SEM (BSE) showed the least error in classification using a support vector machine algorithm. The segmented image shows mineral domains where EDX analysis can be performed on a set amount of points veering away from the pixel-by-pixel full mapping acquisition mode. This methodology can be developed and applied to automated mineralogy image processing systems as a domain-based acquisition mode. This has the potential to improve quantitative mineralogical analysis results accuracy while reducing acquisition time and resource costs.

Automated Mineralogy --- Scanning Electron Microscope --- Correlative Microscopy --- Image Analysis --- Mineral Classification --- Process Mineralogy --- Operational Mineralogy --- Ingénierie, informatique & technologie > Géologie, ingénierie du pétrole & des mines

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Alloys --- -Grain boundaries --- Metals --- -Scanning electron microscopes --- #KVIV:BB --- Scanning electron microscope --- Electron microscopes --- Metallic elements --- Chemical elements --- Ores --- Metallurgy --- Crystal grain boundaries --- Crystal growth --- Dislocations in crystals --- Twinning (Crystallography) --- Metallic alloys --- Metallic composites --- Phase rule and equilibrium --- Amalgamation --- Microalloying --- Microscopy --- Grain boundaries --- Metallography --- Scanning electron microscopes --- Physical metallurgy

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

537.533.35 --- 543.063 --- 549.08 --- Scanning electron microscopy --- Electron microscopy --- Analytical chemistry--?.063 --- Mineralogy. Special study of minerals--?.08 --- 549.08 Mineralogy. Special study of minerals--?.08 --- 543.063 Analytical chemistry--?.063 --- 537.533.35 Electron microscopy --- Aftastmicroscoop [Elektronische ] --- Microscope electronique a balayage --- Scanning electron microscope --- Spectroscopie par rayons X --- X-ray spectroscopie --- X-ray spectroscopy --- X-ray microanalysis --- Microprobe analysis --- Experimental solid state physics --- Spectrometric and optical chemical analysis --- fysicochemie --- Microscope electronique --- Microscopes electroniques a balayage --- Rayon x

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book is dedicated to the use of nanomaterials for the modification of asphalt binders, and to investigate whether or not the use of nanomaterials for asphalt mixtures fabrication achieves more effective asphalt pavement layers. A total of 10 contributions are included. Four are related to “Binder’s modification” and five to “Asphalt mixtures’ modification”. The remaining contribution is a review of the effects of the modifications on nanomaterials, particularly nanosilica, nanoclays and nanoiron, on the performance of asphalt mixtures. The published group of papers fosters awareness about the use of nanomaterials to modify asphalt mixtures to obtain more performant and durable flexible road pavements.

History of engineering & technology --- Graphene nano-platelets (GNPs) --- asphalt --- Scanning Electron Microscope (SEM) --- structural performance --- functional performance --- nanomaterials --- life cycle assessment --- nano-modified asphalt materials --- environmental impact --- spring-thaw season --- freeze-thaw cycle --- Nanomaterial modifier --- nano hydrophobic silane silica --- property improvement --- seasonally frozen region --- aggregate-bitumen interface --- bond strength --- nano titanium dioxide --- epoxy emulsified asphalt --- photocatalysis --- exhaust gas degradation --- modified asphalt mixtures --- polymers --- rheological behavior --- fatigue cracking --- permanent deformation --- modified bitumen --- nanosilica --- nanoclay --- nanoiron --- asphalt mixtures --- mechanical performance --- aging sensitivity --- ageing --- plastic film --- urban waste --- moisture --- indirect tensile strength --- graphene nanoplatelets (GNPs) --- EAF steel slag --- microwave heating --- self-healing --- Asphalt modification --- modifier chemistry --- long-term aging --- asphalt rheology --- phase angle --- delta Tc