烧结工艺对粉末烧结多孔材料微观结构与力学性能影响

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

摘要:

本文进行了烧结气氛和烧结温度对支撑体孔径、透过性能影响的研究。环拉实验结果表明,氢气烧结样品的抗拉强度87.56MPa,氢气+氯化铵活化烧结样品115.20MPa,强度提高了30%。通过烧结温度对支撑体力学性能影响的研究,得到了支撑体致密度和力学性能之间的关系,可实现通过测试多孔材料的密度来预测多孔材料的强度。

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.