Microstructure and Mechanical Properties of Al2O3-TiC/Al in Situ Composites


Article Preview

The Al2O3-TiC/Al composites were prepared by injecting CO2 gas into Ti contained Al-Si alloy melts. The microstructure of the composites was examined by XRD, SEM and TEM. It was indicated that both Al2O3 and TiC particles can be formed by the in situ reaction of CO2 with Ti and Al in the melten alloys. The Al2O3 and TiC particles in size of 0.3~1.5μm distributed uniformly in the matrix. The volume fraction of the particles is mainly depend upon the time of CO2 injection.The tensile strength at room temperature of the composites can reach 346.08MPa and the hardness is 149.6MPa HBS, repectively, which are higher than those of the matrix alloy.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim




H. M. Chen et al., "Microstructure and Mechanical Properties of Al2O3-TiC/Al in Situ Composites", Key Engineering Materials, Vols. 326-328, pp. 1857-1860, 2006

Online since:

December 2006




[1] V. H. López, A. Scoles and A. R. Kennedy, The thermal stability of TiC particles in an Al7wt. %Si alloy, Mater. Sci. Eng. A, Vol. A356(1-2) (2003), p.316.

DOI: https://doi.org/10.1016/s0921-5093(03)00143-6

[2] Y. Zhu, H.A. Kishawy. Influence of alumina particles on the mechanics of machining metal matrix composites. Int J Mach Tools Manuf, Vol. 45(4-5) (2005), p.389.

DOI: https://doi.org/10.1016/j.ijmachtools.2004.09.013

[3] M. Kok, Production of Metal Matrix (Al2O3-reinforced) Composite Materials and Investigation of Their Machinability by Ceramic Tools, Ph.D. Thesis, Firat University, Elazıg, Turkey, (2000).

[4] M. Kok. Production and mechanical properties of Al2O3 particle-reinforced 2024 aluminium alloy composites. J Mater Process Technol, Vol. 161(3)(2005), p.381.

DOI: https://doi.org/10.1016/j.jmatprotec.2004.07.068

[5] B. S. S. Daniel, V. S. R. Murthy and G. S. Murty, Metal-ceramic composites via in-situ methods. J. Mater. Process. Technol., Vol. 68(2)(1997), p.132.

[6] S.C. Tjong and Z.Y. Ma. Microstructural and mechanical characteristics of in situ metal matrix composites. Material Science Engineering: R: Reports, Mater. Sci. Eng. R Rep., Vol. 29(3-4)(2000), p.49.

[7] M.J. Koczak and K.S. Kumar, In situ process for producing a composite containing refractory material.U.S. patent 4, 808, 372. (1989).

[8] S. Khatri and M. Koczak, Formation of TiC in in situ processed composites via solid-gas, solid-liquid and liquid-gas reaction in molten Al-Ti, Mater. Sci. Eng. A, Vol. 162(1-2)(1993), p.153.

DOI: https://doi.org/10.1016/0921-5093(90)90040-a