Crystallization Behavior and Mechanical Properties of In-situ Alumina-Zirconia Composite Bodies

Document Type: Original Research Article

Authors

Department of Materials Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

In-situ alumina-zirconia composite bodies were fabricated by heat treatment of gibbsite-zircon-kaolinite mixture at 1450℃. The current research investigated crystallization behavior and mechanical properties of the mentioned mixture in the presence of 5 wt.% MgO as an additive. X-ray diffraction (XRD) results showed that alumina, zirconia, and magnesium aluminosilicate were crystallized during the heat treatment at 1250-1550℃. It was expected that mullite and zirconia were crystallized as the final phases; however, the addition of 5 wt.% of MgO changed the behavior of the mentioned mixture during the heat treatment at 1250-1550℃. Energy diffractive X-Ray spectroscopy (EDS) reported that after heat treatment at 1450℃, an Al3+-rich aluminosilicate phase was formed as the matrix of the composite. Crystallization of alumina and zirconia and the existence of the amorphous aluminosilicate phase formed a composite with appropriate hardness and mechanical strength. The diametral tensile strength and Vickers microhardness values of the final composite were 130±7 MPa and 7.49 ± 1.2 GPa, respectively.

Keywords

Main Subjects


 

  1. Nevarez-Rascon, A., Aguilar-Elguezabal, A., Orrantia, E., Bocanegra-Bernal, M.H., "Compressive strength, hardness and fracture toughness of Al2O3 whiskers reinforced ZTA and ATZ nanocomposites: Weibull analysis", International Journal of Refractory Metals and Hard Materials, Vol. 29, (2011), 333-340.
  2. Zhong, J., Zhao, J., Liang, S., Tan, X., Zhou, M., Zhang, G., "Synthesis of spherical (30 nm) and rod-like (200 nm) zirconia co-reinforced mullite nanocomposites", Ceramics International, Vol. 39, (2013), 4163-4170.
  3. Orooji, Y., Ghasali, E., Moradi, M., Derakhshandeh, M.R., Alizadeh, M., Asl, M.S., Ebadzadeh, T., "Preparation of mullite-TiB2 -CNTs hybrid composite through spark plasma sintering", Ceramics International, Vol. 45, (2019) 16288-16296.
  4. Rendtorff, N.M., Garrido, L.B., Aglietti, E.F., "Thermal shock behavior of dense mullite–zirconia composites obtained by two processing routes", Ceramics International, Vol. 34, (2008), 2017-2024.
  5. Maitra, S., Pal, S., Nath, S., Pandey, A., Lodha, R., "Role of MgO and Cr2O3 additives on the properties of zirconia–mullite composites", Ceramics International, Vol. 28, (2002), 819-826.
  6. Orooji, Y., Derakhshandeh, M.R., Ghasali, E., Alizadeh, M., Asl, M.S., Ebadzadeh, T., "Effects of ZrB2 reinforcement on microstructure and mechanical properties of a spark plasma sintered mullite-CNT composite", Ceramics International, Vol. 45, (2019), 16015-16021.
  7. Khor, K.A., Li, Y., "Effects of mechanical alloying on the reaction sintering of ZrSiO4 and Al2O3", Materials Science and Engineering: A, Vol. 256, (1998), 271-279.
  8. Xu, C., Huang, C., Ai, X., "Toughening and strengthening of advanced ceramics with rare earth additives", Ceramics international, Vol. 32, (2006), 423-429.
  9. Panda, A.K., Mishra, B.G., Mishra, D.K., Singh, R.K., "Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay", Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 363, (2010), 98-104.
  10. Chandra, D., Das, G., Maitra, S., "Comparison of the Role of M g O and C a O Additives on the Microstructures of Reaction‐Sintered Zirconia–Mullite Composite", International Journal of Applied Ceramic Technology, Vol. 12, (2015), 771-782.
  11. Ebadzadeh, T., Ghasemi, E., "Effect of TiO2 addition on the stability of t-ZrO2 in mullite–ZrO2 composites prepared from various starting materials", Ceramics International, Vol. 28, (2002), 447-450.
  12. Moya, J.S., Miranzo, P., Osendi, M.I., "Influence of additives on the microstructural development of mullite-ZrO2 and alumina-ZrO2", Materials Science and Engineering: A, Vol. 109, (1989), 139-145.
  13. Garrido, L.B., Aglietti, E.F., "Reaction-sintered mullite–zirconia composites by colloidal processing of alumina–zircon–CeO2 mixtures", Materials Science and Engineering: A, Vol. 369, (2004), 250-257.
  14. Sistani, P.B., Kiani-Rashid, A., Beidokhti, S.M., "Microstructural and diametral tensile strength evaluation of the zirconia-mullite composite", Ceramics International, Vol. 45, (2019), 7127-7136.
  15. Sainz, M.A., Serrano, F.J., Amigo, J.M., Bastida, J., Caballero, A., "XRD microstructural analysis of mullites obtained from kaolinite–alumina mixtures", Journal of the European Ceramic Society, Vol. 20, (2000), 403-412.
  16. Temuujin, J., MacKenzie, K.J.D., Schmücker, M., Schneider, H., McManus, J., Wimperis, S., "Phase evolution in mechanically treated mixtures of kaolinite and alumina hydrates (gibbsite and boehmite)", Journal of the European Ceramic Society, Vol. 20, (2000), 413-421.
  17. Descamps, P., Sakaguchi, S., Poorteman, M., Cambier, F., "High‐Temperature Characterization of Reaction‐Sintered Mullite‐Zirconia Composites", Journal of the American Ceramic Society, Vol. 74, (1991), 2476-2481.
  18. Hou, Z., Cui, B., Liu, L., Liu, Q., "Effect of the different additives on the fabrication of porous kaolin-based mullite ceramics", Ceramics International, Vol. 42, (2016), 17254-17258.
  19. Awaad, M., Zawrah, M.F., Khalil, N.M., "In situ formation of zirconia–alumina–spinel–mullite ceramic composites", Ceramics International, Vol. 34, (2008), 429-434.