| Si含量对镍基合金氧化保护膜影响机制的研究 |
| |
| 引用本文： | 初蕾,刘英才,梁丹维,尹衍升,王昕.Si含量对镍基合金氧化保护膜影响机制的研究[J].中国海洋大学学报(自然科学版),2011(Z1):291-294. |
| |
| 作者姓名： | 初蕾 刘英才 梁丹维 尹衍升 王昕 |
| |
| 作者单位： | 中国海洋大学材料科学与工程研究院; |
| |
| 基金项目： | 山东省重点基金项目(ZR2009FZ003); 青岛市科技计划项目(09-1-3-39-jch)资助 |
| |
| 摘 要： | 本文对镍基合金中Si在弱氧化环境下表面氧化成膜特性进行了研究。利用XRD、SEM、EDS等检测手段对试样进行了检测分析,结果发现:合金表面氧化膜的形成动力学对镍基合金的Si含量非常敏感。当合金元素Si的含量较高时,由于连续的非晶SiO2膜在表层氧化铬与奥氏体基体之间的富集阻碍了Cr离子的向外扩散,导致在奥氏体区之上形成了较薄的氧化铬膜;共晶组织区域由于不会形成连续的SiO2非晶膜,仍然可以作为Cr离子的快速扩散通道,使得在该组织区域形成大量的脊状氧化物。奥氏体组织之上的氧化膜厚度与基体的Si含量成反比。
|
| 关 键 词： | 镍基合金 微观结构 氧化膜 Si含量 |
Influence of Si Content on the Formation of Protective Film against Surface Oxidation in Ni-based Alloy |
| |
| CHU Lei,LIU Ying-Cai,LIANG Dan-Wei,YIN Yan-Sheng,WANG Xin.Influence of Si Content on the Formation of Protective Film against Surface Oxidation in Ni-based Alloy[J].Periodical of Ocean University of China,2011(Z1):291-294. |
| |
| Authors: | CHU Lei LIU Ying-Cai LIANG Dan-Wei YIN Yan-Sheng WANG Xin |
| |
| Institution: | CHU Lei,LIU Ying-Cai,LIANG Dan-Wei,YIN Yan-Sheng,WANG Xin(Institute of Materials Science and Technology,Ocean University of China,Qingdao 266100,China) |
| |
| Abstract: | Effects of silicon concent in Ni-based alloys on the formation of oxide scales were examined in low O2 partial-pressure atmosphere.Thin film mold XRD,SEM and EDS were used to analyze the microstructure of the oxide scale.It was found that the formation mechanism was sensitive to the Si content of alloy.For high Si containing alloy,the formation of continuous SiO2 film on the metal/oxide boundary can block the outside diffusion of elements,this effect was especially obvious above the austenitic structure.Oxi... |
| |
| Keywords: | Ni-based alloy microstructure oxide film Si content |
| 本文献已被 CNKI 等数据库收录！ |
|
