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A System Approach to Automated Scanning Electron Microscopy

Much of the innovative activity in scanning electron microscopes (SEMs) has been devoted to ultra high magnification instruments for the use of researchers characterizing materials and processes at nanometer scales, but there is also a growing interest in robust industrial tools operating at more modest magnifications.
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The Myth of Resolution

The SEM with the better resolution specification will deliver better pictures at any magnification. True or False?
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Optical vs. Electron Beam Imaging

The only realistic way to understand a population of particles is to measure a sufficiently large distribution of individuals relative to pertinent parameters such as size, shape, and composition. In nearly every case, the most reliable technique for obtaining such a distribution involves the direct imaging of particles such that their dimensional attributes can be accurately established.  DOWNLOAD PDF

Understanding Particulate Contaminants via Automated E-Beam Analysis

Particulate contaminants are an important concern in today's precision automotive assemblies. Whether driven by quality, cost, or performance considerations understanding the source and impact of particles requires detailed knowledge of their distribution in size and composition. Particle-by-particle measurement of filtered material is today conducted automatically by computer-operated microscope systems. DOWNLOAD PDF

Introduction to Automated Particle Analysis by Focused Electron Beam

This little document is intended to provide a brief entry-level introduction to the concepts and technology employed in the automated particle analysis systems manufactured by ASPEX Corp. My objective is to convey a big-picture sense of what our instruments do, and roughly how they do it.  DOWNLOAD PDF

AFA and CFA

Recently the scanning electron microscope (SEM) has been added to the standard arsenal of oil analysis tools. While the particles typically found in oil are much larger than the features one typically associates with an SEM, the SEM is well suited to analyzing these particles and brings with it an array of talents that are unavailable in the other instruments often used for oil analysis. DOWNLOAD PDF

Process Design of Inclusion Modification in Cast Steel using Automated Inclusion Analysis

This paper studies the effects of changes in melting and ladle practices (deoxidation, slag, refractory types, etc.) in steel foundries on steel cleanliness. The effects of deoxidation and pouring practices on the size, type and number of inclusions were compared for steel foundries using induction and arc furnaces of capacity 1 to 20 tons.  DOWNLOAD PDF
 

An Alternative Automated Electron Beam Technology for Gold Characterization

In the processing of gold-bearing ores the ability to characterize gold occurrences in various metallurgical products is an important matter. Historically, metallurgical methods such as diagnostic leaching [1] were used in support of gold deportment and association analyses.  DOWNLOAD PDF
 

Foreign Particle Size Distribution and Characterization in Pharmaceutical Products using a High Throughput Electron Beam Analyzer

In an effort to meet FDA recommendations, pharmaceutical manufacturers and contract research facilities are adopting the Quality by Design (QbD) approach to assess the quality and safety of solid and parenteral drug products with respect to foreign particles.  DOWNLOAD PDF
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