粉末及烧结工艺对金属多孔材料性能的影响  

Effect of Powder and Sintering Process on Properties of Powder Metal Porous Materials

作　　者：汪强兵[1,2] 李广忠[2] 汤慧萍[2] 杨保军 奚正平[2] 王培 Wang Qiangbing Li Guangzhong Tang Huiping Yang Baojun Xi Zhengping Wang Pei(State Key Laboratory for Mechanical Behavior of Materials, Xi＇an Jiaotong University, Xi＇an 710061, China State Key Laboratory of Porous Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi＇an 710016, China The 404 Ltd, China National Nuclear Corporation, Jiayuguan 732850, China)

机构地区：[1]西安交通大学,陕西西安710061 [2]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016 [3]中核404有限公司,甘肃嘉峪关732850

出　　处：《稀有金属材料与工程》2017年第9期2684-2687,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50674076);国家高技术研究发展计划("863"计划)(2012AA03A610)

摘　　要：进行了粉末、烧结气氛和烧结温度对支撑体孔径、透过性能影响的研究。结果表明,获得了支撑体材料的制备工艺窗口,原料粉末应选粒度≥100μm,烧结温度在1150~1300℃之间调整。环拉实验结果表明,氢气烧结样品的抗拉强度87.56 MPa,氢气+氯化铵活化烧结样品115.20 MPa,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。The effects of powder,sintering atmosphere and sintering temperature on pore radius and permeability of porous support were investigated. The formation process of the support layer using metal powder was obtained. Results show that the average particle size of initial powder is ≥100 μm and the support layer is sintered at 1150~1300 °C for 2 h. Ring tensile results show that tensile strength of H_2 atmosphere sintered sample is 87.56 MPa while that of an activation atmosphere of H_2 with 0.2 wt% NH_4Cl addition sintered sample is 115.20 MPa,which is enhanced by 30%. The effects of sintering 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 the strength of porous materials by testing density of porous materials.

关 键 词：粉末 金属多孔材料 烧结温度 透气系数 

分 类 号：TF125.6[冶金工程—粉末冶金]