Accident

I met with an accident while I was working at the a of EMPA, Switzerland.
Two of my fingers were squeezed between the cover of a kneader, accidentally loosing the grip of the cover.

So I will be out of work until 5th Jan 2009. Sad about that. Will be alone at home. :(

Fibers

Fibers can be made of any material like ceramics, glass, polymers, metals, etc..
They have a huge impact on the modern technology. If emphasized one can say that it can strengthen a composites having fibers in a matrix.

Fiberglass is the most common and a very old application of fibers. Fiberglass is a composite with polymer matrix with glass fiber and thus the name given fiberglass or glass fiber.

Instead of these glass fibers, fibers of others materials mentioned above also can be used to make different materials with different properties and will change the way of the world that exist today.

Extrusion of Ceramics

Extrusion is one of the main process and an old process for materials engineers. With extrusion you can make intricate shapes with a plastic paste. Even ceramics can be processed using this method. Someone could think that it is only be done to plastics, but as mentioned above metals and ceramics can also be extruded.

Type of extruder
1. Ram type extruder
2. Screw type extruder

Ceramic extrusion (Considering ram type extruder)
To extrude ceramic into a required shape, one must formulate and create a paste according to his/her requirements. The person should think about its plasticity, viscosity, thixotropy, etc. (basically the rheology of the paste) and the pressure it needs to do a good extrusion, the speed of the extrusion, etc.. It is seen that if there is not enough pressure there will be defects on the extruded parts and also all the other parameters are also very important for the quality of the final product.

--cheers

After a long time

Hello Everyone,

I am now doing my internship in Empa, Switzerland. It is a great company which does lot of researches attached to the industry. It's a really new experience for me.
More things later.

Have fun. :-)

Facing to the exam...

Got a bit relief from the exam. But it still going on. 5 subjects to be written. :-)

Characterization of Materials as I have mentioned earlier too, is really an interesting subject. Quantum theories are really interesting. I love quantum world. Someone who loves quantum mechanics, he/she really should improve skills on mathematics on which I should also have to concentrate.

-cheers

Studying for the semester end examination...

It is a tough semester with all the non-academic work and the work load of the semester. Exam will be started on 15th September.

So concentrating on the exam. Therefore I will not be able to update till the exam ends. :-) But sometimes I will put some interesting notes here. So check back.

-cheers

Colored Gold

White gold and yellow gold are the most common types of gold colors used in jewelry making. But did you know that, various other colors of gold are also available and some of these colors may surprise you.

For example, have you heard of purple gold, or black gold and even blue gold? It is quite likely that you might have never heard of these gold colors. Here are the details of the various gold colors used in gold jewelry production in recent times.

However these attractive gold colors have some disadvantages over normal carat gold alloys. Read this complete report before you make any decision on ordering colored gold jewels.