采用同步热分析(Simultaneous Thermal Analysis, STA)分析了Al在非高压空气下(压力0.2 MPa,流速20 NmL/min)的氧化过程.用X射线衍射(XRD)对铝粉颗粒表面生成的氧化物进行了物相分析并用扫描电镜(SEM)观察了表面形貌.研究结果表明,140 ℃铝开始氧化,300 ℃以上开始生成γ-Al2O3,一直持续至515 ℃左右.从666.1 ℃开始,表面生成氧化物的铝粉颗粒芯层中的铝熔融.从773 ℃开始,γ-Al2O3转变成α-Al2O3, 800 ℃,α-Al2O3开始生长,α-Al2O3的生长遵循Sigmoid(Boltzmann)模型.整个氧化过程,铝粉的氧化占主要地位,但也包括铝粉的氮化.XRD、SEM的分析结果表明,表面生成的AlN及α-Al2O3为纳米级,弥散分布于铝粉颗粒表面.
参考文献
| [1] | 朱子新,徐滨士,马世宁,杜则裕.热处理对铁铝涂层相组成及滑动磨损性能的影响[J].金属热处理,2002(04):24-27. |
| [2] | 田宝艳,ZHANG Jing-de,毕见强,GU Na,徐廷鸿.化学镀法制备Fe包覆Al复合粉末[J].人工晶体学报,2008(04):825-828,848. |
| [3] | 曲恒磊,周廉,魏海荣.钛铝高温氧化表面分析[J].稀有金属材料与工程,2000(02):90-93. |
| [4] | 卢红霞,毛爱霞,郑路,孙洪巍,胡行.纳米铝粉的性质及其对沉淀法制备纳米氧化铝粉体的作用[J].人工晶体学报,2006(02):257-260. |
| [5] | Law C K .A Simplified Theoretical Model for the Vapor-phase Combustion of Metal Particles[J].Combustion Science and Technology,1973,7(05):197-212. |
| [6] | Brooks K P;Beckstead M W .Dynamics of Aluminum Combustion[J].Journal of Propulsion and Power,1995,11(04):769-780. |
| [7] | Liang Y;Beckstead M W.Numerical Simulation of Unsteady,Single Aluminium Particle Combustion in Air[J].American Institute of Aeronautics and Astronautics,1998:98-3825. |
| [8] | Mikhaylo A. Trunov;Mirko Schoenitz;Xiaoying Zhu;Edward L. Dreizin .Effect of polymorphic phase transformations in Al_2O_3 film on oxidation kinetics of aluminum powders[J].Combustion and Flame,2005(4):310-318. |
| [9] | 于成龙;王秀峰;张科 等.Al直接氮化法制备纳米AlN晶须的形成过程及形貌观察[J].功能材料,2007,38(增刊):2412-2414. |
| [10] | Jeurgens LPH.;Sloof WG.;Tichelaar FD.;Mittemeijer EJ. .Composition and chemical state of the ions of aluminium-oxide films formed by thermal oxidation of aluminium[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2002(3):313-332. |
| [11] | Shinvim K;Kobayashi K;Thompson G E et al.Apparent Induction Period for γ-Al2O3 Development in Thermal Oxide Films on Aluminium[J].Oxidation of Metals,1991,36(1-2):1-13. |
| [12] | Rai A;Park K;Zhou L;Zachariah MR .Understanding the mechanism of aluminium nanoparticle oxidation[J].Combustion theory and modelling,2006(5):843-859. |
| [13] | Brown I W M;Bowden M E;Kemmitt T et al.Structural and Thermal Characterisation of Nanostructures Alumina Templates[J].Current Applied Physics,2006,6(03):557-556. |
| [14] | Sturm E;Winterhager H .High-temperature Oxidation of Aluminium[J].Aluminium,1978,54(07):441-444. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%