Heating Rate Effects on Properties of Powder Metallurgy Fe-Cr-Al2O3 Composites

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The aim of this study is to determine the optimum heating rate in fabricating Fe-Cr-Al2O3 composites by powder metallurgy methods. The Fe-based composites reinforced with ceramics are widely used due to their high strength, hardness and wear resistance. Among steps in powder metallurgy methods are mixing, compaction and sintering. Sintering is a very important step due to its ability to evolve microstructural features that govern the end properties. Sintering of green compacts made of iron powder mixture must be performed in vacuum or in a reducing atmosphere because water-atomised iron powder particles are oxidized on the surface and in this way some deoxidation reaction can occur during sintering. The heating process up to sintering temperature, plays a major role, the major proportion of densification occurs during the heating process. The composites produced were subjected to the following tests: densification, Vickers micro hardness, microstructure using SEM and X-ray diffraction analysis. From this investigation, to achieve higher densification and hardness the optimal heating rate is 10°C/minute. X-Ray Diffraction study showed that the fabrication of the composites does not lead to any compositional changes of the matrix phase and the reinforcing phase.

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Edited by:

Zainal Arifin Ahmad, Muhd Ambar Yarmo, Fauziah Haji Abdul Aziz, Dr. Meor Yusoff Meor Sulaiman, Badrol Ahmad, Khairul Nizar Ismail, Nik Akmar Rejab

Pages:

84-89

DOI:

10.4028/www.scientific.net/AMR.173.84

Citation:

S. Saidatulakmar et al., "Heating Rate Effects on Properties of Powder Metallurgy Fe-Cr-Al2O3 Composites", Advanced Materials Research, Vol. 173, pp. 84-89, 2011

Online since:

December 2010

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$35.00

[1] B. Ralph, H. C Yuen and W. B Lee, Journal of Materials Processing Technology, 63(1997), (339-353).

[2] M. G Dahlke, Wear. 261(2006), Pp. 1383-1389.

[3] N. Chawla and X. Deng, , Materials Science and Engineering A. 390 (2005), Pp. 98–112.

[4] F. Akhtar, and S. J. Guo, Materials Characterization. 59 (1) (2008), Pp. 84-90.

[5] A. Bautista, C. Moral, F. Velasco, C. Simal and S. Guzmán, Journal of Materials Processing Technology. 189 (1-3) (2007), pp.344-351.

[6] E. Pagounis, M. Talvitie and V. K Lindroos, Materials Research Bulletin (1996) 31(10), Pp. 1277-1285.

[7] F. Velasco, W.M. Lima, et. al. Effect of intermetallic particles on wear behavior od stainless steel matrix composites. Tribology International 36 (7) (2003), Pp. 547-551.

DOI: 10.1016/s0301-679x(02)00264-5

[8] G. S Upadhyaya, Sintered Metallic and Ceramic Materials Preparation, Properties and Applications. (West Sussex: John Wiley & Sons 2000). Pp. 8-35.

[9] J. Das, K. Chandra, P.S. Misra and B. Sarma,. Hardness and tensile properties of Fe-P based alloys made through powder forging technique. Materials Science and Engineering A. 479 (2008), Pp. 164-170.

DOI: 10.1016/j.msea.2007.06.030

[10] M. G Fontana: Corrosion Engineering. (McGraw–Hill New York 1987) P. pp.282-287.

[11] Y. Lu, Composites Science and Technology. Vol. 66 (33) (2006), Pp. 591-598.

[12] E. Pagounis and V. K Lindroos, Materials Science and Engineering A. 246 (1-2) (1998), Pp. 221-234.

[13] M. Vardavoulias, C. Jouanny-Tresy and M. Jeandin, Wear, Vol. 165 (2)(1993), Pp. 141-149.

DOI: 10.1016/0043-1648(93)90329-k

[14] S.K. Mukherjee and G. S Upadhyaya, Materials Science and Engineering. Vol. 75 (1-2) (1985), Pp. 67-78.

[15] H. Danninger and C. Gierl, Materials Chemistry and Physics, Vol. 67, Pp. 49-55.

[16] Z.Y. Liu, N. H Loh, K. A Khor and S. B Tor, Materials Letters, Vol. 45 (2000), Pp. 32-38.

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