I have to use nickel powder as cladding material which will be pre-replaced on the substrate and for that, I have to use a binder for preparing paste using nickel powder. So, what binder can be used?
That depends on how the coated part is processed afterwards. If you are planning a sintering process in a furnace under vacuum or inert gas, then you need a binder that evaporates easily and leaves no carbon residue. This could be, for example, an aqueous solution of polyvinyl alcohol.
However, if you later want to melt the "glued" nickel powder layer using a laser, then polyvinyl alcohol would be a wrong choice. In this case I would have tried a water solution of water glass as a binder.
Vadim Verlotski Sir thank you for your response. Can I use polyethylene glycol as a binder for nickel powder?
Yes, you can. In addition to polyvinyl alcohol and polyethylene glycol, you can also take methyl cellulose from the group of water-soluble polymers. There are also many non-water-soluble binders, such as paraffins, which are also widely used in powder metallurgy.
Dhiraj
If you decide to use polyethylene glycol as a binder and try to heat it to evaporate and also to sinter to the base material, then be careful, fume from PEG is not good for the health. Also you have not said anything about the base material.
Dr. K
Navin Kothari sir thank you for your response. My base material is 410 stainless steel.
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