Effect of Sinter Process on Microstructure and Mechanical Properties of Powder Metallurgy Porous Materials

Abstract:

The effects of sinter atmosphere and sinter temperature on pore radius and permeability of porous support were investigated in the present paper. Ring tensile resultes show that atmosphere of H₂ sintered sample tensile strength is 87.56 MPa and an activation atmosphere of H2 adding 0.2wt% NH4Cl sintered sample tensile strength is 115.20 MPa, the strength of an activationsintered sample is enhanced 30 percent. The effects of sinter temperature on mechanical properties of porous support were also investigated. The relationship between density of porous support and mechanical properties was obtained. The relationship could be used to forecast strength of porous materials by test density of the porous materials.