Influence of powder loading on density and microstructure of MIM Fe-50Ni soft magnetic alloys

摘要

Fe-50Ni soft magnetic alloys are commonly used for electromagnetic applications such as printers,relays,disk drives,hearing aid devices and fuel injection components in vehicles,to name just a few.Many of these applications now require the soft magnetic parts to be micro-sized and of complex shape,which means that conventional processing by machining of wrought Fe-Ni alloys is not very cost-effective.Even the press and sinter route is often not suitable,because the high level of porosity in the sintered parts can result in lower magnetic properties.Research being carried out by M Ali,et at,at the Universiti Teknologi Petronas,Seri Iskandar,Malaysia,in cooperation with researchers at Center of Excellence in Science and Applied Technologies,Islamabad,and COMSATS,Sahiwal,Pakistan,has focused on developing the Metal Injection Moulding process as a cost-effective alternative to producing micro,complex-shaped components with high dimensional accuracy from Fe-50Ni soft magnetic alloys.The researchers claim that the higher density and improved microstructure achieved in Fe-50Ni parts produced using MIM will lead to enhanced magnetic performance.The results of their research to date have been published in the journal Materials Science & Engineering Technology(Vol.50,March 2019,pp 274-282).