Polymorphism, Other Engineering

Assignment Help:

Q. Define the polymorphism.

Ans. POLYMORPHISM: It is defined as the change in atomic structure which occurs at a definite transformation temperature. The cooling diagram of iron. Iron exists more than one atomic structure depending upon temperature.

The melting point of iron is 1539 degree C. When molten iron solidifies from the liquid state at 1539 degree C and just below 1539 degree C, then the iron has B.C.C. structure.

This structure is called delta iron. When it is further cooled at 1401 degree C. The structure now converts into F.C.C. structure.

This is called γ iron, it is non-magnetic on further drop in temperature i.e. at 910 degree C it again converts in two B.C.C. structure. This is called α-iron. The α-iron is non magnetic up to 768 degree C.

When further drop in temperature from 768 degree C it becomes magnetic but atomic structure remains unchanged.


Related Discussions:- Polymorphism

Statics, Create resolving questions on comments of couples

Create resolving questions on comments of couples

TANGENT GALVANOMETER, WHY THE NEEDLE OF TANGENT GALVANOMETER DEFLECT WITH I...

WHY THE NEEDLE OF TANGENT GALVANOMETER DEFLECT WITH INCREASING OR DECREASING CURRENT?

Thermodynamics, original temp. of plate is 25 degree c.when put in burnace ...

original temp. of plate is 25 degree c.when put in burnace its upper part is 250 c and lower is 100 and mass is 56kg.find out heat transfer

Plane transmission diffraction grating, A diffraction grating is an optical...

A diffraction grating is an optical element that diffracts light into its constituent wavelength (colors). It is an excellent device used in laboratory to study the spectra. Co

Flight control - transfer function models, Transfer Function Models Cor...

Transfer Function Models Corresponding to each linear state space equation in the time domain with input u(t) and output y(t) is a matrix of transfer functions relating the Lap

Help please, Judy Johnson is choosing between investing in two Treasury sec...

Judy Johnson is choosing between investing in two Treasury securities that mature in five years and have par values of $1,000. One is a Treasury note paying an annual coupon of 5.

Logic gates, Logic Gates: The term logic in electronics refers to the r...

Logic Gates: The term logic in electronics refers to the representation and logical manipulation of numbers usually in a code employing two symbols. i.e., bits. An electron

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd