Subhasisa Nath

11 Questions 44 Answers 0 Followers

Questions related from Subhasisa Nath

X-ray Line Profile Analysis of Ni based Superalloy. Issues with contrast factor determination.

Hi folks, I am trying to measure the dislocation density using XLPA. I am dealing with Ni superalloys. To calculate dislocation contrast factor, I need to calculate the value of q which describes...

07 July 2017 5,311 5 View

Does anyone know the dynamic yield strength of AISI A2 tool steel?

Can anyone tell me the approximate value of dynamic yield strength of AISI A2 tool steel? The value doesn't need to be highly accurate. I just need an estimate for A2 tool steel. Any reference to...

06 June 2017 4,602 2 View

Is it necessary for a amorphous material to show broad hump in X-ray diffraction profile?

I did XRD of both yttria stabilized zirconia (YSZ) and alumina (Al2O3) thin films both of which were found to be amorphous using TEM. The XRD also indicated amorphous nature. However, in YSZ, I...

08 August 2014 6,606 8 View

How does one separate out two different micro-structural features (say, pores and cracks) using image analysis ?

I was wondering, how does one use image analysis software (e.g. Image J) for separating cracks and pores in a microstructure of thermal spray coating.

08 August 2014 2,211 4 View

Why does a tetragonal structure show peak splitting?

For example, yttria stabilized zirconia with tetragonal structure. The XRD of YSZ shows peak splitting at some angles. Why? Another thing why the 1st peak is not showing any splitting (at 30 degree)?

06 June 2014 6,019 5 View

Thickness drop at substrate temperature of 573 k in pulsed laser deposition - any thoughts?

I deposited YSZ films by PLD. What I see that at RT deposition, a maximum thickness was achieved which sharply decreases to the minimum value at 573 K. With increase in substrate temperature...

05 May 2014 1,945 2 View

Can I correlate microstructural information (FESEM) of the thin film with XRD results?

I have deposited Yttria stabilized zirconia (YSZ) film by pulsed laser deposition at room temperature. The XRD shows formation of amorphous film while the FESEM structure shows columnar grains...

05 May 2014 9,300 2 View

How to prepare a free standing thin film in simplest way without the use of any specific substrate like NaCl crystal?

I need to see my oxides thin film samples under TEM. But how to prepare free standing thin films for further processing.

09 September 2013 6,065 12 View

How to identify non-transformable tetragonal peaks in XRD as no such phase exists in the database?

While analyzing XRD of yttria stabilized zirconia (YSZ), I found some peaks at around 73-74. Some peaks were matching with JCPDS database of zirconia. When I saw the literature, I found...

08 August 2013 7,054 16 View

Which thermal diffusivity model should we use for thermal diffusivity measurement using Laser flash technique?

If I have a ceramic coating and I want to measure the thermal conductivity, which thermal diffusivity model should I adopt for calculation? If I have a metallic coating? If I have a composite...

08 August 2013 1,889 4 View

What is the difference between doping and alloying in metallurgy?

08 August 2013 9,092 18 View