Document Type : Research Paper


1 University of Technology, Iraq

2 Materials Engineering, University of Technology

3 Materials Engineering,University of Technology


SMAs can switch from one crystallographic structure to another in response to temperature or stress stimuli. When SMAs are exposed to mechanical cyclic stress, they can absorb and discharge mechanical energy by experiencing a reversible hysteretic shape change. SMAs are widely used for sensing, actuation, impact absorption, and vibration damping. This work studied the effect of  CeO2 addition on the transformation temperature and wear resistance of Cu-Al-Ni SMAs. WhereCeO2 was added at different percent’s 0.5, 1, and 3 wt% to the base alloy, followed by casting and homogenization at 900oC. Some tests were carried out: Differential scanning calorimeter, Optical Microscope, Scanning Electron microscopy, Energy dispersion spectrometer, X-Ray Diffraction, and Wear and Hardness tests. OM and SEM tests reveal that both phases of martensite β and γ are found. Also, the additions of CeO2 show a visible effect on phase formation and transformation temperatures. It was observed that increasing of CeO2 particles in Cu-based SMAs owing to improve interfacial bonding between matrix and reinforcement and also observed that the variants become thicker with increasing in percent. Additions of different percentages of cerium oxide increase the hardness of Cu-Al-Ni SMAs. Due to the addition of CeO2 particles, the sample's wear rate decreases compared to pure SMAs.

Graphical Abstract


  • Enhance Transformations Temperature for SMAs by adding CeO2 particles with different percentages.
  • Enhance Wear behavior for SMAs BY adding CeO2 particles with different percentages.
  • Enhance Hardness for SMAs BY adding CeO2 particles with different percentages.


Main Subjects

[1] C. Yang, S. Abanteriba, and A. Becker, A review of shape memory alloy based filtration devices, AIP Adv., 10 (2020). doi: 10.1063/1.5133981.
[2] J. Van Humbeeck, Non-medical applications of shape memory alloys Mater. Sci. Eng, p. .: A 273-275, 134–148, doi:
[3] A. Upadhyaya, Sintering of copper-alumina composites through blending and mechanical alloying powder metallurgy routes, Mater. Des. 16 (1996) 41–45. doi: DOI:10.1016/0261-3069(95)00006-K.
[4] J. G. and J. C. G. S.E Broyles, K.R. Anderson, Creep deformation of dispersion- stregthened copper. Metall. Trans. 1217–1227.
[5] a H. M. T. and T. Y. W. Y. L. Wang, a Y. Z. Wan, a,*X. H. Dong, a G. X. Cheng, PREPARATION AND CHARACTERIZATION OF ANTIBACTERIAL VISCOSE-BASED ACTIVATED CARBON FIBER SUPPORTING SILVER, 36 (1998) 1567–1571. doi: . doi:10.1016/s0008-6223(98)00101-8.
[6] S. A. J. Lee, N.J. Kim, J.Y. Jung, E.S. Lee, Preparation and characterization of antibacterial viscose-based activated carbon fiber supporting silver. , Scr. Mater, 1063–69.
[7] X. Wang and A. Ludwig, Recent Developments in Small-Scale Shape Memory Oxides, Shape Mem. Superelasticity, 6 (2020) 287–300. doi: 10.1007/s40830-020-00299-7.
[8] A. Pandey, A. K. Jain, S. Hussain, V. Sampath, and R. Dasgupta, Effect of Nano CeO2 Addition on the Microstructure and Properties of a Cu-Al-Ni Shape Memory Alloy, Metall. Mater. Trans. B Process Metall. Mater. Process. Sci., 47 (2016) 2205–2210. doi: 10.1007/s11663-016-0691-0.
[9] S. Hussain, A. Pandey, and R. Dasgupta, Nano ‑ CeO 2 Doped Cu – Al – Ni SMAs with Enhanced Mechanical as well as Shape Recovery Characteristics, Met. Mater. Int., (2019)1–5.doi: 10.1007/s12540-019-00570-2.
[10] D. Abolhasani, S. W. Han, C. J. VanTyne, N. Kang, and Y. H. Moon, Enhancing the shape memory effect of Cu-Al-Ni alloys via partial reinforcement by alumina through selective laser melting, J. Mater. Res. Technol., 2021. doi: 10.1016/j.jmrt.2021.10.040.
[11] Xie Dong, Yu Fei, J.B. Wang, Y.Y. Su, F.J. Jing, Y.X. Leng, Nan Huang, Deformation behavior of TiO2 films deposited on NiTi shape memory alloy after tensile and water-bath heating tests, Surf. Coatings Technol., 416 (2021).doi: 10.1016/j.surfcoat.2021.127151.
[12] Salzbrenner RJ, Cohen M. On the thermodynamics of thermoelastic martensitic transformations. Acta Metall. 27 (1979) 739–48.
[13] Lexcellent. Christian Shape Memory Alloy Handbook john wiley and son , NewYork,USA,2nd dition, 2013.
[14] Kato, K. and Hokkirigawa, K., ‘Abrasive Wear Diagram’, in Proceedings of Eurotrib’85, Vols 4–5, Elsevier, Amsterdam, 1985.
[15] C. Y. S. 3 and N. A. P. 4 Lioudmila A. Matlakhova 1,*, Elaine C. Pereira 1, Serguey A. Pulnev 2 and 1, Physical and Structural Characterization of Monocrystalline Cu-13.7% Al-4.2% Ni Alloy Submitted to Thermo-Cyclical Treatments under Applied Loads, Metals (Basel)., 10 (2020).doi: doi:10.3390/met10020219.
[16] 8. Araujo VEA, Gastien R, Zelaya E, Beiroa JI, Corro I, Sade M, et al. Effects on the martensitic transformations and the microstructure of CuAlNi single crystals after ageing at 473 K. J. Alloys Compd. 64 (2015) 155-161.
[17] R. Suhail, A. Adnan, M. K. Abbass, M. M. Al-Kubaisy, and R. S. A. Adnan, The effect of thermo-mechanical treatment on mechanical properties & microstructure for (Cu-Al-Ni) shape memory alloy, Eng. Technol. J. part Eng., 34 (2016) 2518–2526.