Can anyone help me to identify an x-ray spectrum?

31 December 2018 7,002 10 View

How can I calculate the crystallite size from high temperature XRD?

After getting xrd diagram of nanostructured sample heat treated for different temperature with, the crystallite size reduces with temperature which is not logical. I know that the relaxation of...

09 October 2017 9,722 13 View

When the kissinger approach is applicable?

06 July 2017 1,386 2 View

Which crucible can I use it to anneal the cerium oxide(CeO2)?

I want to anneal the CeO2, to use it as a standard for XRD analysis. What is the crucible which can used so that he will not react with the CeO2 at high temperature Best regards.

02 March 2016 7,702 2 View

How to get the same energy of milling with two different Planetary Ball Mills PM400 and PM200?

I have use for my first experience planetary ball mill PM400 (Retsch), and now I want to do another experience with the same condition (same energy of milling) but the PM400 is not functional so I...

02 March 2016 4,077 9 View

What mean isothermal annealing and non isothermal annealing?

09 October 2015 2,297 1 View

Is anyone familiar with XRD at high temperature?

When using a high temperature XRD analysis. We heated with a predetermined rate to the desired temperature, where we realized an analysis: at that moment does we continues to heat during the...

04 May 2015 2,421 14 View

Are there a difference between DTA and DSC ?

I started my thermal analysis using DSC, but the thermocouple was destroyed, hence I thought of using the DTA that is available. My question is, can i do my calculations such as calculating the...

02 March 2015 1,874 11 View

How can I determine the parameters to prepare a pellet?

I wanted to prepare a pellet from a powder using a uniaxial press and a matrix attached to a pump, but with the pressure and the holding time that I have chosen, the pellet obtained breaks up.Are...

31 December 2014 1,023 6 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View