Does 1% stearic acid as PCA means,1% stearic acid and rest 99% water ,or 1% stearic acid and rest 99% is the material to be ball milled,or it is some thing else?What are the other PCA that can be used for Ball milling of copper based composite?
Dear colleague,
The answer is 1 wt.% stearic acid as PCA and the rest of 99 wt.% is the powder material to be ball milled. You don't add any water, because you will make a dry milling. More information you can find out in my paper: M. Lungu et. al., Development of W–Cu–Ni electrical contact materials with enhanced mechanical properties by spark plasma sintering process, Acta Phys. Pol. A, 125, 327–330 (I provided the link).
Best regards.
Dr. Magdalena Valentina Lungu
INCDIE ICPE-CA Bucharest, Romania
http://przyrbwn.icm.edu.pl/APP/PDF/125/a125z2p052.pdf
Please note that 1 wt% stearic acid, given the provided context, is usually to be understood as (mass of stearic acid : mass of material to be milled without this additive)·100%. Hence, for milling each 1 kg of material, you should add 10 g of stearic acid. It is, then, not properly a concentration (mass) ratio for the mixture of the additive with the material to be milled, but rather a formulation (mass) ratio; even if the difference is numerically small for the provided percentage value.
If one use different wt % of stearic acid means in 1 kg of material you should add not only 10 g, but you should use different concentrations with equal steps like 10g, 15g, 20g, 25g -------- then you will get different properties therefore one will be able to correlate different concentrations of acid and their influence on the prepared materials. In this way you can optimize the properties of the material. In short you can made the material with any concentration of acid
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