| Formation of In-Situ Dispersion Strengthening Particles in Cast FeCrAl Alloy |
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| 作者姓名： | He-Li Luo Chang-hai Li |
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| 作者单位： | 钢铁研究总院高温材料研究所 中国钢研科技集团公司集团办公室 钢铁研究总院 |
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| 基金项目： | Foundation Item： Item Sponsored by International Co-operation Project （20061415） |
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| 摘 要： | In order to fabricate dispersion strengthened alloys that strengthened by submicron-sized or nano-sized stable particles through casting routes, understanding of the formation process of dispersion strengthening particles at metal melt is of significance. In present study, Nano NiO and TiO2 particles were selected as reactant to form in-situ dispersion strengthening oxide particles in Fe20Cr5Al alloy. Nano NiO and TiO2 particles powder was separately dispersed into nano Ni powder first. The mixed nano powder was added into Fe20Cr5Al alloy melt when pouring the melt into mold. The study shows that nano NiO particles were not as effective as nano TiO2 particles in forming dispersion strengthening Al2O3 particles. The final diameters of dispersion strengthening oxides particles arose from nano TiO2 particles were in the range of submicron. The Brownian collision of particles had caused this coarsening.
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| 关 键 词： | 合金颗粒 铸造合金 分散 原位 纳米二氧化钛颗粒 颗粒弥散强化 纳米NiO 纳米粒子 |
| 收稿时间： | 2008-11-12 |
Formation of In-Situ Dispersion Strengthening Particles in Cast FeCrAl Alloy |
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| He-Li Luo Chang-hai Li.Formation of In-Situ Dispersion Strengthening Particles in Cast FeCrAl Alloy[J].Journal of Iron and Steel Research,2010,17(2):74-78. |
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| Authors: | FENG Shuo HAN Wei LUO He-li Karin G LI Chang-hai |
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| Affiliation: | [1]High Temperature Material Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China [2]Group Office, China Iron and Steel Research Group, Beijing 100081, China; [3]Department of Materials Science and Engineering, Chalmers University of Technology, Gothenburg SE-412 96, Sweden |
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| Abstract: | In order to fabricate dispersion strengthened alloys that strengthened by submicron-sized or nano-sized stable particles through casting routes, understanding of the formation process of dispersion strengthening particles at metal melt is of significance. In present study, Nano NiO and TiO2 particles were selected as reactant to form in-situ dispersion strengthening oxide particles in Fe20Cr5Al alloy. Nano NiO and TiO2 particles powder was separately dispersed into nano Ni powder first. The mixed nano powder was added into Fe20Cr5Al alloy melt when pouring the melt into mold. The study shows that nano NiO particles were not as effective as nano TiO2 particles in forming dispersion strengthening Al2O3 particles. The final diameters of dispersion strengthening oxides particles arose from nano TiO2 particles were in the range of submicron. The Brownian collision of particles had caused this coarsening. |
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| Keywords: | in-situ dispersion strengthening particles formation cast |
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