We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Nobody downloaded yet

Structural analysing - Essay Example

Comments (0) Cite this document
Scanning Electron Microscope (SEM): A Diverse Analytical Instrument Introduction Scanning electron microscope (SEM) is among the most versatile analytical instruments available to materials scientists. This single instrument can perform multiple analyses of differing characteristics like surface imaging at varying magnifications, micro-chemical analysis and micro-texture analysis depending upon the attachments on the detector side…
Download full paper
Structural analysing
Read TextPreview

Extract of sample
Structural analysing

Download file to see previous pages... Today, an SEM has become an indispensible instrument for any R&D or production set up dealing with advanced materials science. In the subsequent sections interaction of electrons with matter, basic principles of electron microscopy, architecture and working of scanning electron microscope, different attachments to an SEM and applications of SEM in materials science will be discussed in brief with special emphasis on specifications of a modern SEM. Interaction of Electrons with Matter Electrons as a probe are extremely versatile as they generate a wide range of signals which can be detected and processed to get useful and meaningful insight about surface topography, microstructure, microchemistry and micro-texture of the material being probed. Different kinds of signal generated as a result of interaction of electron probe are shown in Fig. 1 [1]. Fig. 1: Schematic Drawing Showing Electron – Matter Interaction When thickness of the specimen is less than ~ 100 nm only then the incident electron beam is able be pass through it and generate different kind of transmitted signals. However, the transmitted signals are relevant for Transmission Electron Microscope (TEM) and not for Scanning Electron Microscope (SEM); therefore, we will not discuss about transmitted signals here. Among the reflected signals secondary electrons (SE) and Back Scattered Electrons (BSE) are relevant for SEM for imaging and characteristic X-rays are useful for chemical analysis in SEM. Besides, BSE is also useful in micro-texture analysis using Electron Back Scattered Diffraction (EBSD) attachment. Therefore, we will limit our focus to these signals only. Secondary Electrons (SE) These are low energy electrons (less than 50 eV) generated after the incident beam hits the substrate. Back Scattered Electrons (BSE) These are high energy electrons (more than 50 eV up to beam energy) generated after the incident beam hits the substrate. Characteristic X-Rays When electron beam strikes the specimen, it knocks out the inner shell electrons and the vacancy thus created is immediately filled by an electron from higher shells. This electronic transition leads to generation of X-rays which are characteristics of the element. Thus these X-rays can be used for micro-chemical analysis using Energy Dispersive Spectroscopy (EDS) and / or Wavelength Dispersive Spectroscopy (WDS). Basic Architecture of SEM Basic architecture of an SEM is presented in Fig. 2 [2]. It is a column always under vacuum consisting of different subcomponents. It consists of an electron gun or electron source. This can be different types, which will be discussed afterwards. This is followed by condenser lenses to focus the beam. There are apertures in the path to allow only and an aperture to allow only the useful (central) portion of the beam to the subsequent stages. The focused beam is double scanned and made to pass through an aperture to fall onto the specimen. The beam is scanned over the specimen in a raster and the generated signals – secondary or back scattered electrons are collected, amplified and again scanned in a raster onto a CRT screen in synchronized manner. Thus image is formed pixel by pixel. The magnification is ratio of ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Structural analysing Essay Example | Topics and Well Written Essays - 1750 words”, n.d.)
Retrieved from https://studentshare.org/environmental-studies/1405308-structural-analysing
(Structural Analysing Essay Example | Topics and Well Written Essays - 1750 Words)
“Structural Analysing Essay Example | Topics and Well Written Essays - 1750 Words”, n.d. https://studentshare.org/environmental-studies/1405308-structural-analysing.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Analysing public health
Health promotion takes on an important aspect of public health and various approaches to its application forms a significant part of its effective management. This essay shall provide an analysis of public health, paying particular attention to the following points: two contrasting health promotion approaches; health topic or health concern; two approaches in the management of the health concern; analysis of two approaches; strengths and weaknesses of each approach; impact of health promotion model; and a personal reflection on the topic.
12 Pages(3000 words)Essay
Structural Fires and Structural Failures
In between 2007 and 2011, fire departments in the United States alone received an average of 366,600 calls per year for home structural fires (Ahrens, 2013, p.1). These fires resulted in over 2,500 casualties and cost $7.2 billion in damage on average every year.
7 Pages(1750 words)Essay
Structural Fesign
Structural design is necessary to ensure that the erected building withstand the loads implied by the live and dead weight supported by the building. To ensure this, the structural engineer must carefully study the architect drawing and design the structural support for the building.
9 Pages(2250 words)Essay
Analysing operational risk failure of Barings bank
The bank's net liabilities worth 1.3 billion was nearly twice that of its investment capital, a figure large enough to capsize its entire assets, cause job losses to over 1200 employees and subsequently, being overtaken by Dutch giant ING for a measly sum of 1, and exposing the risky environment in which equity corporations scale catastrophic limits in order to make a quick profit.
10 Pages(2500 words)Essay
The Inter-relationship between Structural Engineering and Architecture
Yet there is evidence to support the notion that these 'Master Builders' seemed not aware the distinction of the two roles they do. The 'Master Builder' (Ardill) would attend to both aesthetic and structural concerns as of equal importance to the final work and both.
7 Pages(1750 words)Essay
Analysing Organisations(pls assign Ozzie,No:2452)
A large part of this respect comes from the way GE handles its organisational aspects of Power and Control of which examples have been given by those who have been a part of GE as well as those who have observed it from
12 Pages(3000 words)Essay
Structural engineering is based on the engineers knowledge and understanding of the laws of physics as well as the empirical knowledge on structural performance of most building materials. Most of the complex structural systems are design using the basic structural
10 Pages(2500 words)Essay
Structural engineering
Normally continuous beams are analysed as sub-frames by assuming no settlements at supports by walls, columns (or beams) and rotational stiffness by supports provided by
4 Pages(1000 words)Essay
Structural Analysis
The weakest point of the beam is at x-4m. The beam is likely to break at this point. There are several beam section which can be chosen for engineering use. However, the choice should be
6 Pages(1500 words)Assignment
Structural theories

The author claims that sociology follows hypothetical views as a framework for understanding occurrences, for instance, the way groups are formed in people. Lack of these theories would mean a huge list of single leanings or decisions people make or the categories of people, but they would all be an unorganized field.

9 Pages(2250 words)Essay
Let us find you another Essay on topic Structural analysing for FREE!
Contact us:
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us