Compacting or briquetting, Other Engineering

Assignment Help:

        The operation of heating a green compact to an elevated temperature is known as sintering. It is a process by which solid bodies are bonded by atomic forces. It is carried out below the melting temperature of the major constituent of the blended power. Most metals are sintered at 70% to 80% of the melting temperature.

       Following changes occur during the process of sintering :

      (i) The density of the part is increased.

      (ii) Grain boundaries are formed.

      (iii) Plasticity is increased.

      (iv) Better mechanical interlocking is produced.

      (v) Volatile materials that are present are driven off, thus producing porous product.

      The sintering atmosphere is controlled to prevent oxidation of the work. The most frequently used atmosphere are dissolved ammonia and hydrogen.


Related Discussions:- Compacting or briquetting

Dynamic model of pitching motion , It is instructive to investigate the pit...

It is instructive to investigate the pitching motion caused by a disturbance from trim due to a control surface deflection. We shall assume that the velocity remains constant, and

Method of calculating the thrust forces-engine performance, Method of calcu...

Method of calculating the thrust forces: The thrust forces or gas loads can be calculated for the engine, or for any flow section of the engine, provided that the areas, pressu

Hp air for aircraft services, Hp air for aircraft services: A number of...

Hp air for aircraft services: A number of aircraft accessories produce sufficient heat in normal use to require a cooling system to prevent overheating. A good example is the

Construction, notes on non tilting concrete drum mixers

notes on non tilting concrete drum mixers

Dsp-bilinear transformation, Convert the analog filter the system function...

Convert the analog filter the system function Ha(s)=(s+0.1)/((s+0.1)(s+0.1)+16) with digital iir filter by bilinear transformation .the digital filter is to have the resonent freq

Fire safety management on railway stations, Fire safety management on railw...

Fire safety management on railway stations: Storage  tanks  are  not  allowed  above  underground  structures  or  within  a  certain distance of them. Some staff exits are

Functional checks of chemical de-icing systems, FUNCTIONAL CHECKS OF CHEMIC...

FUNCTIONAL CHECKS OF CHEMICAL DE-ICING SYSTEMS: Once the correct flow rate of the fluid supply has been established the distribution of the fluid flow over the blades should be

Propeller overspeed governors, PROPELLER OVERSPEED GOVERNORS: These dev...

PROPELLER OVERSPEED GOVERNORS: These devices protect against overspeed, they are separate governors to the P.C.U. and direct oil during an overspeed situation to coarsen the bl

Fluid mechanics, 2 horizontal flate plate 0.15mm apart and space between th...

2 horizontal flate plate 0.15mm apart and space between them is filled with an oil having viscosity 1poise the upper plate of area 1.5m2 is required to move with a speed of 0.5m/se

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