How to correctly choose metal powder metallurgy materials

Metal powder metallurgy has a wide range of applications and a wide variety of materials. How to choose suitable metal powder metallurgy materials?
Powder metallurgy friction reducing materials are also called sintered friction reducing materials. It is prepared by immersing lubricating oil into the pores of materials or adding friction reducers or solid lubricants to the material composition. The friction coefficient between material surfaces is small, and it has a long service life and high reliability when lubricating oil is limited; under dry friction conditions, it has a self-lubricating effect by relying on itself or the lubricant contained on the surface. Widely used in bearings, bearing bushes or face seals.
Powder metallurgy porous materials, also known as porous sintered materials. It is formed by molding and sintering spherical or irregular-shaped metal or alloy powder. The pores in the material are criss-crossed and interconnected. The porosity is generally 30%-60%, the pore size is 1-100μM, and it has good permeability, thermal conductivity, high temperature and low temperature resistance, thermal shock resistance and medium corrosion resistance. Used to manufacture filters, porous electrodes, fire extinguishing devices, antifreeze devices, etc.
Metal powder metallurgy structural materials, also known as sintered structural materials. It can withstand tensile, compression, torsion and other loads, and can work under friction and wear conditions. Due to the presence of residual pores in the material, its plasticity