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Characterization of Al2O3 in High-Strength Mo Alloy Sheets by High-Resolution Transmission Electron Microscopy

Published online by Cambridge University Press:  25 February 2016

Yucheng Zhou ,
Yimin Gao ,
Shizhong Wei  and
Yajie Hu
Yucheng Zhou*
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
Yimin Gao
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
Shizhong Wei
Affiliation:
Henan Engineering Research Center for Wear of Materials, Henan University of Science & Technology, Luoyang 471003, China
Yajie Hu
Affiliation:
Henan Engineering Research Center for Wear of Materials, Henan University of Science & Technology, Luoyang 471003, China
*
*Corresponding author. zycwlm@163.com
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Abstract

A novel type of alumina (Al2O3)-doped molybdenum (Mo) alloy sheet was prepared by a hydrothermal method and a subsequent powder metallurgy process. Then the characterization of α-Al2O3 was investigated using high-resolution transmission electron microscopy as the research focus. The tensile strength of the Al2O3-doped Mo sheet is 43–85% higher than that of the pure Mo sheet, a very obvious reinforcement effect. The sub-micron and nanometer-scale Al2O3 particles can increase the recrystallization temperature by hindering grain boundary migration and improve the tensile strength by effectively blocking the motion of the dislocations. The Al2O3 particles have a good bond with the Mo matrix and there exists an amorphous transition layer at the interface between Al2O3 particles and the Mo matrix in the as-rolled sheet. The sub-structure of α-Al2O3 is characterized by a number of nanograins in the $\left[ {2\bar{2}1} \right]$ direction. Lastly, a new computer-based method for indexing diffraction patterns of the hexagonal system is introduced, with 16 types of diffraction patterns of α-Al2O3 indexed.

Keywords

doped Mo sheetaluminainterfacehydrothermal methodHRTEM
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 22 , Issue 1 , February 2016 , pp. 122 - 130
Copyright
© Microscopy Society of America 2016 

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References

Ahmadi, E., Malekzadeh, M. & Sadrnezhaad, S.K. (2011). Preparation of nanostructured high-temperature TZM alloy by mechanical alloying and sintering. Int J Refract Met H 29, 141–145.CrossRefGoogle Scholar
Alemi, A., Hosseinpour, Z., Dolatyari, M. & Bakhtiari, A. (2012). Boehmite (gamma-AlOOH) nanoparticles: Hydrothermal synthesis, characterization, pH-controlled morphologies, optical properties, and DFT calculations. Phys Status Solidi B 249(6), 1264–1270.CrossRefGoogle Scholar
Chakraborty, S.P., Banerjee, S., Sharma, I.G., Paul, B. & Suri, A.K. (2009). Studies on the synthesis and characterization of a Mo-based alloy. J Alloys Compd 477, 256–261.CrossRefGoogle Scholar
Chen, C., Wang, S., Ji, Y.L., Wang, M.P., Li, Z. & Wang, Z.X. (2014). The microstructure and texture of Mo–La2O3 alloys with high transverse ductility. J Alloys Compd 589, 531–538.CrossRefGoogle Scholar
Chithambararaj, A. & Chandra Bose, A. (2011). Hydrothermal synthesis of hexagonal and orthorhombic MoO3 nanoparticles. J Alloys Compd 509, 8105–8110.CrossRefGoogle Scholar
Cockeram, B.V. (2010). The role of stress state on the fracture toughness and toughening mechanisms of wrought Mo and Mo alloys. Mat Sci Eng A Struct 528, 288–308.CrossRefGoogle Scholar
Dubiel, B., Chmielewski, M., Moskalewicz, T., Gruszczynski, A. & Czyrska-Filemonowicz, A. (2014). Microstructural characterization of novel Mo-Re-Al2O3 composite. Mater Lett 124, 137–140.CrossRefGoogle Scholar
Fan, J., Qian, Z. & Cheng, H. (2013). Effect of trace TiC/ZrC on property and microstructure of TZM alloy at room and high temperature. Rare Metal Mat Eng 42(4), 853–856.Google Scholar
Jang, O.J., Yang, C.-W. & Lee, D.B. (2013). Transmission electron microscopy characterization of thermomechanically treated Al3Ti–~8, 10, 15% Cr intermetallics. Microsc Microanal 19(Suppl 5), 89–94.CrossRefGoogle ScholarPubMed
Li, G.R., Wang, H.M., Yuan, X.T. & Zhao, Y.T. (2013). Microstructure of nanometer Al2O3 particles reinforced aluminum matrix composites processed by high pulsed electromagnetic field. Mater Lett 99, 50–53.CrossRefGoogle Scholar
Li, L., Wang, L.-L., Sanchez, S.I., Kang, J.H., Wang, Q., Zhang, Z., Frenkel, A.I., Johnson, D.D., Nuzzo, R.G. & Yang, J.C. (2009). HREM, EXAFS and MD studies on size-dependent crystallinity of Pt nanoparticles supported on γ-Al2O3. Microsc Microanal 15(Suppl 2), 1210–1211.CrossRefGoogle Scholar
Liu, J., Suryanarayana, C., Ghosh, D., Subhash, G. & An, L. (2013). Synthesis of Mg-Al2O3 nanocomposites by mechanical alloying. J Alloys Compd 563, 165–170.CrossRefGoogle Scholar
Liu, Z. (2008). Fundamentals of Materials Science, 3rd ed. Xi’an, China: Northwestern Polytechnical University Press, pp. 304–315.Google Scholar
Motta, M.S., Jena, P.K., Brocchi, E.A. & Solórzano, I.G. (2001). Characterization of Cu–Al2O3 nano-scale composites synthesized by in situ reduction. Mater Sci Eng C Mater 15, 175–177.CrossRefGoogle Scholar
Pohl, C., Schatte, J. & Leitner, H. (2013). Solid solution softening of polycrystalline Mo–hafnium alloys. J Alloys Compd 576, 250–256.CrossRefGoogle Scholar
Primig, S., Clemens, H., Knabl, W., Lorich, A. & Stickler, R. (2015). Orientation dependent recovery and recrystallization behavior of hot-rolled Mo. Int J Refract Met H 48, 179–186.CrossRefGoogle Scholar
Primig, S., Leitner, H., Clemens, H., Lorich, A., Knabl, W. & Stickler, R. (2010). On the recrystallization behavior of technically pure Mo. Int J Refract Met H 28, 703–708.CrossRefGoogle Scholar
Simões, S., Viana, F., Ramos, A.S., Vieira, M.T. & Vieira, M.F. (2015). TEM and HRTEM characterization of TiAl diffusion bonds using Ni/Al nanolayers. Microsc Microanal 21, 132–139.CrossRefGoogle ScholarPubMed
Su, X.H., Chen, S.F. & Zhou, Z.J. (2012). Synthesis and characterization of monodisperse porous alpha-Al2O3 nanoparticles. Appl Surf Sci 258, 5712–5715.CrossRefGoogle Scholar
Subasri, R. & Näfe, H. (2008). Texture in Na-beta-Al2O3 due to microwave processing. Mater Chem Phys 112, 16–19.CrossRefGoogle Scholar
Tavoosi, M., Karimzadeh, F. & Enayati, M.H. (2008). Fabrication of Al-Zn/alpha-Al2O3 nanocomposite by mechanical alloying. Mater Lett 62, 282–285.CrossRefGoogle Scholar
Vestergaard, J.S., Kling, J., Dahl, A.B., Hansen, T.W., Wagner, J.B. & Larsen, R. (2014). Structure identification in high-resolution transmission electron microscopic images: An example on graphene. Microsc Microanal 20, 1772–1781.CrossRefGoogle ScholarPubMed
Wang, Y., Gao, J., Chen, G., Li, W., Zhou, Y. & Wei, Z. (2008). Properties at elevated temperature and recrystallization of Mo doped with potassium, silicon and aluminum. Int J Refract Met H 26, 9–13.CrossRefGoogle Scholar
Wei, S., Xu, L., Zhang, G., Li, J. & Dai, B. (2012). Microstructure and properties of Mo-based composites reinforced by Al2O3. Appl Mech Mater 120, 467–470.CrossRefGoogle Scholar
Wesemann, I., Hoffmann, A., Mrotzek, T. & Martin, U. (2010). Investigation of solid solution hardening in Mo alloys. Int J Refract Met H 28, 709–715.CrossRefGoogle Scholar
Xie, H., Li, F. & Wang, Y. (2011). Study on dynamic recrystallization behavior of powder metallurgy Mo. Rare Metal Mater Eng 40, 669–672.Google Scholar
Xu, L., Wei, S., Liu, Q., Zhang, G. & Li, J. (2013). Microstructure and high-temperature frictional wear property of Mo-based composites reinforced by aluminum and lanthanum oxides. Tribology Trans 56(5), 833–840.CrossRefGoogle Scholar
Zaki, T., Kabel, K.I. & Hassan, H. (2012). Using modified Pechini method to synthesize alpha-Al2O3 nanoparticles of high surface area. Ceram Int 38, 4861–4866.CrossRefGoogle Scholar
Zhang, G.-J., Sun, Y.-J., Zuo, C., Wei, J.-F. & Sun, J. (2008). Microstructure and mechanical properties of multi-components rare earth oxide-doped Mo alloys. Mater Sci Eng A Struct 483–484, 350–352.CrossRefGoogle Scholar