How can you improve the relative density after sintering in pure copper powder metal injection moulding process?
I would also like to know the d50 of the metal powder for MIM. .competition { font-family:Arial, Helvetica, sans-serif; font-size:11px; color:#000; background-image:url(http://www.metal-powder.net/images/ipodcompo/bg.gif); background-repeat:no-repeat; background-color:#2749ba; text-align:left; padding:12px; padding-top:80px; } .question { margin-bottom:8px; border-bottom:1px dashed #ccc; padding-bottom:8px; } –> In answer to your first question: There are two issues here; the purity of copper and the sintering process. Even if you start with the purest copper powder, the powder will oxidize when exposed to air during feedstock formulation. So you need to reduce the oxides during the sintering cycle. Since the copper oxides are easily reduced by a number of atmospheres, this is not a difficult situation. The extent of sintering achieved as measured by the density attained is a function of temperature and time, when other factors are constant. The maximum density attained is always lowe
