Is there a process for changing crystalline silicon nanostructures or nanoparticles to amorpous silicon which is going to be used in Li ion batteries?

Amorphous silicon has lower volumetric change than crystalline silicon during first cycles of charge and discharge. How can we prepare amorpous silicon from nanostructured crystalline silicon? Is...

10 November 2019 2,401 4 View

How to clean copper surface before coating process?

What are suitable reagents for removing oxide layer and grease or organic impurities from copper surface before the coating process?

07 August 2019 2,913 4 View

How to leach Fe impurities out of Silicon Suspension?

High energy ball milling used to prepare silicon micro and nano particles. I used magnetic separation to remove iron. But there is a small amount of iron left in the suspension. How can I remove...

06 July 2019 4,269 2 View

How to calculate density of a coating layer?

It's a coating with few micrometers in thickness. There are equations for thickness prediction. But for using them, I need to know the coating density. I'm using spray coating method. The...

06 July 2019 6,846 4 View

What are suitable reagents for color eching of AISI 304 stainless steel?

Any reagent for revealing microstructure, electroetching, chemical etchin, or other methods. I need the colorful microstructure image. I only need the artistic aspect of images!

06 July 2019 6,161 3 View

What are flow lines?

Does anyone knows a reference book that describes this phenomena? Are flow lines and shear bands the same or they're different from each other? why flow lines appear in micro structure? (Attached...

01 February 2018 3,036 0 View

Why second phase particles cluster during cold work?

In the attached picture, rolling direction is from bottom to the top(vertical).

01 February 2018 1,905 0 View

Can grain structure be revealed using SEM?

can we see the grains and grain boundaries without using any etching procedure by SEM?

11 December 2017 7,982 2 View

What is the main reason for edge cracking of aluminum alloys during cold rolling?

sheet edge geometry change, workability limitation or something else?? Does anyone have studied about that?

09 October 2017 4,589 3 View

Does anyone know the best temperature for quench and best temperature for partitioning in Quench and Partitioning heat treatment of AISI 4140 steel?

I need to achieve maximum impact energy and hardness at the same time.Any experiment or reliable article??

08 September 2017 9,764 2 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 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