Son Thanh Nguyen

14 Questions 41 Answers 0 Followers

Questions related from Son Thanh Nguyen

Could you share the reference intensity ratio (RIR) of nickel?

I'm looking for weight fraction of my ceramic-nickel composite by using XRD. In order to calculate the fraction using RIR method, I need to know the I/Ic ratio of nickel. However, in the database...

12 December 2014 9,420 3 View

Does anyone work with Oxide-Dispersion-Strengthened (ODS) steel?

I have worked with yttirum titanate, Y2Ti2O7, an oxide phase which is usually used to disperse in steel to strengthen its physical properties. Now I am searching for other phases such as Y2TiO5,...

27 February 2014 5,543 2 View

Why do we have both 3-point and 4-point bending-strength tests?

Maybe this is an odd question, but so far I don't understand why we have two standard methods for testing bending/flexural strength of fine ceramic, (3-points- and 4 points-bending tests) though...

25 January 2014 9,917 28 View

Which features on EDS spectrum will be defected if the analysed surface of sample is not very flat?

Assuming that we have analysed a sample with SEM-EDS. If the surface of the sample was not polished (or not polished very well), then it would not be very flat. I am curious how much this rough...

07 December 2013 6,882 2 View

Which coating technique is the best for EDS analysis (ceramic sample)?

For using FE-SEM-EDS to analyse the composition of a ceramic sample, usually we coat the sample to make it conductive before insert it into FE-SEM. What I'm curious is which coating technique will...

05 December 2013 683 13 View

How will the XRD diffractogram/pattern change if we increase the voltage/current of X-ray sources?

Assuming in a XRD system we have one sample, but two different sets of diffractometer (including X-ray source and detector). I am wondering, how will the results change (peak intensity, analysing...

27 November 2013 5,524 6 View

What are differences between thermal, chemical and plasma etching in ceramic engineering?

As far as I know, there are three popular methods of etching in ceramic engineering, which are: thermal, chemical and plasma etching. We usually use these technique to etch the grain boundary on...

27 November 2013 6,755 2 View

Is there anyone working with X-Ray CT Skyscan 1172?

I am working with X-ray CT Skyscan 1172 and its accompanied software CT-An. Are you experienced with this device? Can we share some analysing techniques, especially in diffusion mapping and...

19 November 2013 2,841 12 View

Can we get particle size distribution by using BET?

Maybe you agree with me that using BET we can get information of pore size distribution. But, I am wondering whether we can know particle size distribution from this technique? Assuming that every...

15 November 2013 5,034 19 View

How to evaluate grain boundary penetration?

I am thinking of a way to investigate the penetration of nanoparticles into ceramic sintered body. As we know, even in highly dense (up to 99.9% of relative density) sintered bodies, there are...

27 October 2013 3,519 4 View

Which is the best way to cut a sample for SEM/EDS analysis?

I have a specimen fabricated by sandwiching a metal foil between two ceramic plates, and heating them over melting point of the metal. Now I would like to investigate the diffusion, or...

25 October 2013 2,351 5 View

What is the real relationship between grain size and bending strength of a ceramic material?

Maybe you agree with me that the hardness of a ceramic will increase when its grain size reduce. There are a lot of work studying on the mechanism of this phenomenon. However, what will happen...

03 October 2013 6,974 5 View

What is the reason of strange Si peak in SEM/EDS analysis?

I am using SEM/EDS analysis to investigate the composition of my sample (which was sintered by Y, Ti, O and Fe). Unexpectedly, there is a peak of Si coming out. I tried to analyze the sample few...

28 September 2013 8,111 17 View

Which is a good way to observe the interface between metal and ceramic layers?

I have prepared some sandwich of metal and ceramic layers. Now I would like to observe their interface, especially in atomic level. I am thinking about using FIB to cut out some samples from the...

14 September 2013 8,063 8 View