Armin Rajabi

22 Questions 77 Answers 0 Followers

Questions related from Armin Rajabi

Is it possible that nano-ceramics synthesised using 3D printing while lays are still fabricated?

3D printing is a process of making three dimensional solid objects from a digital file which object is created by laying down successive layers of material until the object is created

08 August 2019 7,121 1 View

Does anyone know, how can synthesis Cellulose Acetate Butyrate (CAB)?

CAB is similar for cellulose diacetate except that it is tougher, more durable and has better dimensional stability

10 October 2018 2,146 0 View

Does anyone know, why the intensity of FTIR peaks changed while the functional groups are same?

Fourier Transform-Infrared Spectroscopy (FTIR) is an analytical technique used to identify organic (and in some cases inorganic) materials. In this study, nano silver coated on the fabric at...

08 August 2018 6,208 3 View

What are the reasons for pecks changing in FTIR test after coating on the fabric?

The FTIR results revealed a increase in the peaks intensity for Ago-coated polyethylene terephthalate (PET) in the 2000–4000 cm-1

08 August 2018 3,655 0 View

What are the effective parameters on the UV absorbance ?

UV spectroscopy is an important tool in analytical chemistry .When UV radiations are absorbed, this results to the excitation of the electrons from the ground state towards a higher energy state....

08 August 2018 8,204 7 View

How can I calculate weight percentage of production via hydrothermal method?

Two different salt were solved in the distilled water in room temperature. The final reaction was done by hydrothermal method. So, I want to calculate the weight percentage the production. Can...

08 August 2017 7,958 1 View

Is the mechanical alloying method repeatable?

Mechanical alloying (MA) is a relatively novel method that has been successfully applied for materials, such as intermetallic compounds and transition metal carbides, which are difficult to...

07 July 2017 1,143 10 View

Does anyone know how I can prepare powder samples to measure contact angle?

I want to measure the contact angle of the nano metal oxide such as, Zn, Ag and Cu.

07 July 2017 408 7 View

Does anyone know that Burgers vector of as-milled powders varies with increasing the microstain due to the ball–powder collision?

The Burgers vector associated with a dislocation is a measure of the lattice distortion caused by the presence of the line defect. During mechanical alloying, the powders are subjected to...

03 March 2017 8,221 0 View

Does anyone know how we can measure density for a compound with different stoichiometry?

Density is defined as mass per unit volume. The density of the majority of the material is available in the literature. Actually I would like to find the density of TiC0.7N0.3 please let me know.

10 October 2015 3,514 2 View

What is the reactivity index?

How can measure the reactivity index for materials?

02 February 2015 881 2 View

What is the effect of amorphous carbon on DSC?

Carbon is a main source of a reaction, eg carbothermal reaction is widely used. This reaction is usually exothermic. Can the presence of amorphous carbon be effective on results in DSC?

02 February 2015 1,194 11 View

Effect of Morphology of second phase on mechanical properties of composites?

Can anybody suggest, what is the best morphology of second phase in composite?In general, mechanical properties of composite can be depended to second phase (spherical, tube and fiber). So I want...

09 September 2014 7,074 20 View

How to measure mechanical properties of nano-powders?

After synthesizing, I need to measure the mechanical properties of nano-powders. Does anyone know how mechanical properties (e.g hardness, toughness) are measured in nano powders?

01 January 2014 4,544 13 View

Anyone know of a paper/standard showing necessary pressure for making solid formation of nano powders?

e.g. bulk from the nano powders to test by nano indenter. In order to get mechanical properties nano powders, they should be tested by nano indenter. How much pressure is need to compact nano...

01 January 2014 6,989 1 View

What is the difference between TRS and bending strength?

Is Transverse rupture strength (TRS) used for ceramics? How is it different from bending strength?

08 August 2013 8,539 1 View

Does anybody know how the non-stick coating is fabricated on Al-substrate?

I am looking for ceramic coating used on Al-substrate as non-stick and anti wear. Please let me know which coating is most suitable.

07 July 2013 3,430 18 View

Ar-gas

I am using Ar-gas as protector in the furnace. According to the flow meter, the usage quantity is 340 liter for each process at room temperature (1 liter/min). So, would you please let me know,...

07 July 2013 2,807 3 View

What is the correlation between oxygen absorption and density of ceramic materials?

The quantity of oxygen increased after heating for ceramic materials at high temperature. So, I want to know, if absorption oxygen can improve density or not.

07 July 2013 686 1 View

Does anybody know what is a good way to measure shrinkage of ceramics?

Usually, after heat treatment at high temperature, ceramics will be faced with a problem of shrinkage. The geometry of of our samples are tablet ( diameter= 13mm, H=2mm)

07 July 2013 3,985 9 View

How can I find Cp (specific heat at constant pressure) for Ti(CN)?

I need thermodynamic data about Cp, Enthalpy, Entropy for TiCN material.

09 September 2012 7,401 5 View

How I can prepare, non-stick ceramic coatings on Al substrate?

03 March 2012 7,864 0 View