I want to prepare a equimolar high entropy alloy through planetary ball milling using Al, Cr, Cu, Zn and Sn. can anyone tell me how much ethanol should i use to avoid agglomeration ?
I recommend to use organic liquid like benzene to prevent undesirable oxidation of the powders. Anyway (even if you use alcohol), you need to use such amount that all mixed material will be under the liquid level. Be careful also with balls-to-powder ration, milling time and cooling the cup to prevent undesirable overheating.
About possible corrosion of aluminium by anhydrous alcohols. ― you may check my first post elsewhere at this forum: https://www.researchgate.net/post/what_are_the_effects_of_mechanical_ball_milling_on_oxygen_layer_developed_on_Aluminum_powder
On the agglomeration of ball-milled aluminium powder: https://www.researchgate.net/post/I_observed_agglomeration_of_aluminium_Powder_after_the_ball_milling_at_250_rpm_R_d_results_are_correct
On the volume of PCA (yet for toluene) for ball milling of metal powders: https://www.researchgate.net/post/Volume_of_PCAs_in_Planetary_Ball_milling
On the volume of PCA (yet for stearic acid) for ball milling of a copper based composite: https://www.researchgate.net/post/What_does_1_stearic_acid_as_processing_control_agent_mean_in_Ball_Milling_of_Copper_based_composite
I'm currently working on HEA powder by mechanical alloying. I'm using the stearic acid under Argon atmosphere to prevent cold welding (instead of ethanol). Good luck!
Stearates are very good neutral media for use in ball milling. So you should use Stearic acid or some derivative for efficient ball milling instead of ethanol.As already mentioned by our friend Tomasz Stasiak .
Thank you everyone for your answers.
for now i have used ethanol but in the coming studies, i will definitely be trying the stearic acid.
Tomasz sir
I am also working on HEA area.
I have used zirconia balls during ball milling for titanium and nickel.
Is it right?
Or any alternative?
How much stearic acid should be added to vessel?
How to maintain argon atmosphere in an open ball milling?
Hello Ganesh,
I'm using hardened steel balls and vials. The contamination by balls and vial materials is a significant problem for some milling conditions and HEA compositions. You can read about this in my recent paper: Article Novel Multicomponent Powders from AlCrFeMnMo Family Synthesi...
I added 2 wt% of stearic acid for milling in a planetary mill.
How to maintain the argon atmosphere is a tricky question. There will be always some leaks and it will be difficult to maintain pure argon. Good luck!
Thank you
Sir
But for Titanium and Nickel - we need to use tungsten carbide ball or stainless steel ball or zirconia ball.
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