Thermal analysis of Fe-carbide and Fe-C mixtures

Authors

  • Ruangdaj Tongsri Powder Metallurgy Research and Development Unit National Metal and Materials Technology Center
  • Bhanu Vetayanugul Powder Metallurgy Research and Development Unit National Metal and Materials Technology Center

Keywords:

Differential thermal analysis, Iron, Carbides

Abstract

Differential thermal analysis (DTA) was employed to monitor changes which occurred during heating of Fe-carbide and Fe-C mixtures. The DTA curves showed a relationship between endothermic peaks and phase transformations given in the Fe-C phase diagram. The transformations included (i) magnetic Fe to non-magnetic Fe, (ii) pure α-Fe to pure γ-Fe, (iii) γ + Fe3C → Liquid and (iv) pure γ-Fe to pure δ-Fe. Melting of the Fe-SiC powder compacts when sintered at temperatures higher than 1200°C was revealed and indicated by the endothermic peak of 1230°C. This peak corresponded to the transformation of γ + Fe3C → Liquid. That meant that decomposition of SiC particles had occurred, and Si and C atoms subsequently diffused into iron particles. DTA curves of the Fe-TiC, Fe-WC and Fe-VC mixtures did not show peaks corresponding to melting. This indicated that TiC, WC and VC were stable when they were brought into contact with iron at elevated temperatures.

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References

Coovattanachai, O., Mima, S., Yodkaew, T., Krataitong, R., Morkotjinda, M., Daraphan, A., Tosangthum, N., Vetayanugul, B., Panumas, A., Poolthong, N. and Tongsri, R. 2006. Effect of admixed ceramic particles on properties of sintered 316L Stainless Steel. In: Advances in Powder Metallurgy and Particulate Materials (Compiled by Gasbarre, W. R. and von Arx, J. W.) Princeton, N.J.: Metal Powder Industries Federation. 7-161 – 7-171.

Tan, M. J. and Patankar, S. N. 2000. Liquid phase sintering in SiC/316L stainless steel composites. In: Advances in Powder Metallurgy and Particulate Materials. Princeton, N.J.: Metal Powder Industries Federation. 9-141-9-149.

Pelleg, J. 1999. Reactions in the matrix and interface of the Fe-SiC metal matrix composite system. Mater. Sci. Eng. A-Struct 269: 225-241.

Panumas, A., Yotkaew, T., Krataitong, R., Morakotjinda, M., Daraphan, A., Tosangthum, N., Coovattanachai, O., Vetayanugul, B. and Tongsri, R. 2005. Preparation of 316L-Al2O3 composite. The 19th Conference of Mechanical Engineering Network of Thailand. October 19-21. Phuket, Thailand.

Chakthin, S., Poolthong, N. and Tongsri, R. 2008. Effect of reaction between Fe and carbide particles on mechanical properties of Fe-base composite. Adv. Mater. Res. 55-57: 361-364.

Chakthin, S., Morakotjinda, M., Yodkaew, T., Tosangthum, N., Krataithong, R., Siriphol, P., Coovattanachai, O., Vetayanugul, B., Thavarungkul, N., Poolthong, N. and Tongsri, R. 2008. Influence of carbides on properties of sintered Fe-base composites. J. Met. Mater. Miner. 18 (2): 67-70.

Chakthin, S., Morakotjinda, M., Yodkaew, T., Tosangthum, N., Krataithong, R., Siriphol, P., Coovattanachai, O., Vetayanugul, B., Thavarungkul, N., Poolthong, N. and Tongsri, R. 2008. Properties of sintered Fe-carbide composites. The 22th Conference of Mechanical Engineering Network of Thailand. October 15-17. Pathum Thani, Thailand.

Chakthin, S., Poolthong, N., Thavarungkul, N. and Tongsri, R. 2008. Iron-Carbide Composites Prepared by P/M. The Third International Conference on Processing Materials for Properties (PMP-III). December 7-10. Bangkok, Thailand.

J. R. Davis and Asm International Handbook Committee. 1998. Metals Handbook Desk Edition 2nd Edition. : 160

Uemura, K. 1943. Diffusion of elements in solid iron and steel (II). The Iron and Steel Institute of Japan (ISIJ). 29 (4): 329-335.

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Published

2017-04-15

How to Cite

[1]
R. . Tongsri and B. Vetayanugul, “Thermal analysis of Fe-carbide and Fe-C mixtures”, J Met Mater Miner, vol. 20, no. 1, Apr. 2017.

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Original Research Articles

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