Prajna Deepthi

14 Questions 10 Answers 0 Followers

Questions related from Prajna Deepthi

PTFE molded by compression molding followed by sintering. Do sintering temperature should be more than melting temperature?re than melting ?

In literature, i found sintering temperatue should be more than melting temperature. can anyone let me know why it should be high

19 November 2021 1,412 2 View

Difference between powder metallurgy and compression moulding?

For polymer powders in some articles it was mentioned as powder metallurgy and in some articles, it was compression molding. For polymers, is both are same

01 October 2021 5,959 4 View

My PTFE composite heat of fusion is 72 j/g and heat of crystallization is 36j/g. Why should so much variation?

After melting peak, during cooling process, crystallization peak has obtained. Why so much difference in values . what are the losses

16 August 2021 2,138 0 View

Why heat of fusion and heat of crystallization changes from polymer to polymer composite?

When added graphite in PTFE, heat of fusion and heat of crystallization both has decreased to PTFE values. But copper coated graphite showed an increase in heat of fusion and heat of crystallization.

29 July 2021 4,806 2 View

How to calculate percentage of crystallinity for copper filled PTFE composites?

In denominator do we have to put fully crystallised heat of fusion value of copper.

20 July 2021 2,292 2 View

Will wear increases for PTFE composite with increasing sliding speed?

As sliding speed increases contact time will be less, so wear should decrease. kindly clarify

07 August 2018 5,722 3 View

Want to measure the wear rate at different sliding speed.In most of papers read wear is measured at only constant speed.suggest diffrnt speeds chosen?

Working ON PTFE material with graphite as filler. What all the sliding speeds can be considered for carrying the work.

01 July 2018 9,392 5 View

Journal bearing and sliding bearing both mean the same?

can any one provide material on journal bearing . I want to manufacture the bearing and characterise that Kindly do needful in this regard

30 March 2018 5,382 2 View

Can i take glass transition temperature as sintering temperature.for sintering PTFE with filler?

cold compaction followed by sintering. so if sintering is done at glass transition temperature, will the hardness be improved

16 December 2017 649 0 View

What temperature PTFE compacted powders should be sintered.is that sintering should be carried in vacuum furnace.

PTFE being matrix and graphite being reinforcement, has to be sintered after compaction.

09 June 2017 7,368 1 View

What is formula for finding density of polymer composite, when it is reinforced,

Knowing the density values what is the formula for finding density of polymer composite.

24 May 2017 1,712 2 View

If particle size of both PTFE and graphite is 35 micron,can compactiion happens.KIndly let me know how much difference should be in particle size?

Will both PTFE and Graphite bond together after compaction. I have to mix PTFE powder with graphite, PTFE being matrix and graphite being reinforcement.These polymer matrix composites has to be...

21 February 2017 7,567 7 View

Is carbon fiber and graphite fiber means the same?

graphite fiber and carbon fiber is it the same .

15 February 2017 1,884 9 View

What instrument should be used for measuring the electrical conductivity or resistivity of copper?

I have tried with electro chemical analyser, but it was showing only 1.2.kindly suggest

06 April 2016 3,521 3 View