| 激光烧结制备藕状316不锈钢多孔材料的微孔结构特征 |
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| 引用本文： | 沈以赴,吴鹏,顾冬冬,李玉芳.激光烧结制备藕状316不锈钢多孔材料的微孔结构特征[J].航空学报,2007,28(5):1236-1241. |
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| 作者姓名： | 沈以赴 吴鹏 顾冬冬 李玉芳 |
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| 作者单位： | 南京航空航天大学,材料科学与工程系,江苏,南京,210016 |
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| 基金项目： | 国家自然科学基金-中国工程物理研究院(NSAF)联合基金
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航空基础科学基金
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南京航空航天大学校科研和教改项目 |
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| 摘 要： | 对含预合金316不锈钢和造孔剂（组分包括硼酸和氟硼酸钾）的混合粉末，进行了激光烧结制备藕状多孔材料的实验研究。利用扫描电镜分析了激光烧结试样的微观孔隙特征，并测定其孔隙率。结果表明，在较低的扫描速率下可获得孔径分布均匀、孔隙贯通性良好的藕状多孔结构；当扫描速率逐步提高时，孔隙生长方向沿扫描方向的倾斜趋势有所增强，而若扫描速率高于0.12 m/s，试样内部藕状多孔结构出现紊乱，有序性降低。随扫描速率逐渐提高，试样孔隙率呈下降趋势。
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| 关 键 词： | 特种加工工艺 激光烧结 藕状多孔结构 316不锈钢 孔隙率 |
| 文章编号： | 1000-6893(2007)05-1236-06 |
| 修稿时间： | 2006年9月4日 |
Micropore Structures of Lotus-type Porous 316 Stainless Steel Prepared by Laser Sintering |
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| Shen Yifu,Wu Peng,Gu Dongdong,Li Yufang.Micropore Structures of Lotus-type Porous 316 Stainless Steel Prepared by Laser Sintering[J].Acta Aeronautica et Astronautica Sinica,2007,28(5):1236-1241. |
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| Authors: | Shen Yifu Wu Peng Gu Dongdong Li Yufang |
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| Institution: | Department of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics |
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| Abstract: | Laser sintering of a mixed powder which consisted of 316 stainless steel,H3BO3 and KBF4 was carried out to prepare lotus-type porous materials.The porosity of samples was measured and the characteristics of pores were investigated by scanning electron microscopy(SEM).The results show that a porous lotus-type structure with fine connectivity and distribution uniformity of pores can be fabricated at a lower scan speed.With increasing the scan speed,the pores' tendency to incline towards the scan direction becomes more pronounced.When the scan speed is larger than 0.12 m/s,the lotus-type porous structure becomes irregular.With increasing the scan speed,the porosity of samples becomes lower. |
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| Keywords: | non-traditional machining laser sintering lotus-type porous structure 316 stainless steel porosity |
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