物理真空去合金法制备微米级多孔不锈钢

发布时间：2018-02-16 12:34

  本文关键词： 多孔不锈钢 物理真空去合金 微米孔 Kirkendall效应 扩散速率　出处：《金属学报》2017年05期 　论文类型：期刊论文

【摘要】：采用真空感应炉制备316L-50Mn初始合金,然后通过真空环境下Mn升华去合金制备多孔不锈钢,应用SEM、EDS和XRD等对物理真空去合金工艺方法制备的多孔不锈钢进行分析,并研究去合金过程中温度以及时间对孔的形成、发展以及孔的形貌的影响。结果表明,物理真空去合金工艺可以制备多孔不锈钢,其孔隙率为30%~60%,孔径为0.5~3μm,多孔层深度达到15~60μm。真空热处理温度和时间是物理真空去合金制备方法的2个关键因素,处理温度主要通过影响Mn元素挥发和体扩散速率进而影响孔的形貌,而处理时间对多孔层的深度起到主要作用。
[Abstract]:The initial 316L-50Mn alloy was prepared by vacuum induction furnace, and then the porous stainless steel was prepared by mn sublimation and dealloying in vacuum. The porous stainless steel prepared by physical vacuum dealloying process was analyzed by SEMMOEDS and XRD. The effect of temperature and time on the formation, development and morphology of porous stainless steel was studied. The results showed that the porous stainless steel could be prepared by physical vacuum dealloying process. The porosity is 30 / 60, the pore diameter is 0.5 ~ 3 渭 m, the depth of porous layer is 15 ~ 60 渭 m. The vacuum heat treatment temperature and time are two key factors in the preparation of physical vacuum dealloying. The treatment temperature mainly affects the morphology of pores by affecting mn volatilization and bulk diffusion rate, and the treatment time plays a major role in the depth of porous layer.
【作者单位】： 中国科学院金属研究所;中国科学技术大学材料科学与工程学院;辽宁科技大学材料与冶金学院;
【基金】：国家自然科学基金项目No.31370976 国家重点基础研究发展计划项目No.2012CB619101~~
【分类号】：TB383.4;TG142.71
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本文编号：1515531