What is the melting point of Al4Si?

The formation of Al4Si intermetallic phase was detected by XRD analysis due to the addition of Al as a sintering aid in an ultrahigh temperature ceramic composite. I want to know the melting...

09 October 2018 6,934 6 View

Minimum temperature needed for the progress of { V + C = VC } reaction?

What is the ignition (minimum required) temperature for the direct synthesis of Vanadium Carbide (VC) using Vanadium and Carbon (Graphite) elements?

31 December 2017 5,316 2 View

Does anyone know about the coefficients of thermal expansion of HCP single crystal ceramics?

02 March 2015 7,487 3 View

Can the mismatch in the coefficients of thermal expansion lead to the formation of stress during the sintering?

Can the mismatch in the coefficients of thermal expansion at "a" and "c" directions of a hexagonal structure lead to the formation of stresses at the grain boundaries of poly-crystal ceramics...

02 March 2015 1,358 10 View

What is the mechanism of thermal etching in ceramics?

I have used the thermal etching method (vacuum atmosphere) for detection of grain boundaries. I would like to know which mechanisms or phenomena can lead to the appearance of grain boundaries? Do...

02 March 2015 7,910 7 View

What is the nature of chemical bonding of ZrB2?

I need the exact nature of chemical bonding of ZrB2. I think it is mainly covalent, however, is there any reference or an exact database about he percentage of covalent or ionic bondings?

02 March 2015 4,471 12 View

How to measure the stoichiometric variations during sintering?

10 November 2014 7,786 0 View

Open pores vs. Closed pores?

01 February 2014 4,210 5 View

Is it possible to use "Direct Crack Measurement" method for determination of fracture toughness in ceramics that have 25% porosity?

Because of many porosities in the polished surface of a ceramic composite, I'm not able to detect the cracks induced by vickers indenter. Does the Direct Crack Measurement method only work for...

31 December 2013 2,017 3 View

How can I thermally etch a polished surface of an ultrahigh temperature ceramic composite?

What is the best and easiest method for thermally etching of UHTCs? I want to analyze the microstructure, calculate the grain size, and investigate the grain boundaries of a polished sample. Is...

11 December 2013 7,064 15 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 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

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

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View