Want to join our mediation workshop that helps you to study better?

The Eduladder is a community of students, teachers, and programmers just interested to make you pass any exams. So we help you to solve your academic and programming questions fast.
In eduladder you can Ask,Answer,Listen,Earn and Download Questions and Question papers.
Watch related videos of your favorite subject.
Connect with students from different parts of the world.
Apply or Post Jobs, Courses ,Internships and Volunteering opportunity. For FREE
See Our team
Wondering how we keep quality?
Got unsolved questions? Ask Questions

CE6503-Environmental-Engineering-->View question


Asked On2017-06-14 06:26:55 by:prajwalamv

Taged users:
Fututron

Likes:
Be first to like this question

Dislikes:
Be first to dislike this question
Talk about this  Like  Dislike
View all qusetions
Answers
Issue of purity is often confusing, as there is the absolute purity and the common metals basis purity. On an absolute scale, 99.999% is a very high bar to achieve, since this allows for only 10 ppm impurity with respect the all elements on the periodic tableMetals basis, as is commonly indicated in catalogues, does not include many of the metallurgically important interstitial elements or other nonmetallic impurities. For example, a certificate of analysis that declared Mn is 99.95% purity (min. metals basis) also reported that the Mn has 0.3% oxygen. The Mn is not 99.95% on an absolute basis. If you include the oxygen content, at best the Mn is 99.65% pure on an absolute basis. A metals basis purity may not include: H, B, C, N, O, F, Si, P, S, Cl, As, Se, Br, Te, I, At. Some certificate of analysis forms may only list a handful of elements that were tested; the remainder are untested or unreported. The true value of the impurity concentration is therefore not known.

Characterization, when used in material science, refers to the broad and general process by which a material's structure and properties are probed and measured. It is a fundamental process in the field of materials science, without which no scientific understanding of engineering materials could be ascertained. The scope of the term often differs; some definitions limit the term's use to techniques which study the microscopic structure and properties of materials,while others use the term to refer to any materials analysis process including macroscopic techniques such as mechanical testing, thermal analysis and density calculation.The scale of the structures observed in materials characterization ranges from angstroms, such as in the imaging of individual atoms and chemical bonds, up to centimeters, such as in the imaging of coarse grain structures in metals.

While many characterization techniques have been practiced for centuries, such as basic optical microscopy, new techniques and methodologies are constantly emerging. In particular the advent of the election  microscope and Secondary ion mass spectrometry in the 20th century has revolutionized the field, allowing the imaging and analysis of structures and compositions on much smaller scales than was previously possible, leading to a huge increase in the level of understanding as to why different materials show different properties and behaviors.More recently, atomics force microscopy has further increased the maximum possible resolution for analysis of certain samples in the last 30 years.


Answerd on:2017-06-30 Answerd By:13priya

Likes:
Be first to like this answer

Dislikes:
Be first to dislike this answer
Talk about this  Like  Dislike

You might like this video:Watch more here

Watch more videos from this user Here

Learn how to upload a video over here



Lets together make the web is a better place

We made eduladder by keeping the ideology of building a supermarket of all the educational material available under one roof. We are doing it with the help of individual contributors like you, interns and employees. So the resources you are looking for can be easily available and accessible also with the freedom of remix reuse and reshare our content under the terms of creative commons license with attribution required close.

You can also contribute to our vision of "Helping student to pass any exams" with these.
Answer a question: You can answer the questions not yet answered in eduladder.How to answer a question
Career: Work or do your internship with us.Work with us
Create a video: You can teach anything and everything each video should be less than five minutes should cover the idea less than five min.How to upload a video on eduladder