Effect of porosity on thermal behaviour of sintered P/M iron material

Year 2024, Volume: 10 Issue: 6, 1621 - 1631, 19.11.2024

T. K. Kandavel J. Vignesh D. Vijay

Abstract

Iron components processed through Powder Metallurgy (P/M) route have complex material characteristics due to the presence of pores. The present research work attempts to investigate the influence of porosity on the thermal conductivity of the sintered iron specimens. Green iron compacts of various densities were obtained by applying various compaction pressures. An electric muffle furnace with a capacity of 3.5kW was used for sintering the green compacts. The specimens of the same density were utilized to conduct thermal conductivity experiments. The Design Expert (DE) software has been used to design and conduct the thermal conductivity experiment on specimens. The variations of heat flow through the preforms were studied using ANSYS. Using MATLAB, a similar kind of study was also carried out, and the results were compared. The test results reveal that the thermal conductivity of the P/M iron increases with a decrease in porosity or increase in density.

Keywords

Density, Iron, MATLAB, Powder Metallurgy, Sintering, Thermal Conductivity

References

• [1] Vincent C, Silvain JF, Heintz JM, Chandra N. Effect of porosity on thermal conductivity of copper processed by powder metallurgy. J Phys Chem Solids 2012;73:499-504. [CrossRef]
• [2] Molina JM, Prieto R, Narciso J, Louis E. The effect of porosity on thermal conductivity of Al-12 wt. % Si/SiC composites. Scr Mater 2009;60:582585. [CrossRef]
• [3] Jiyuan Xu, Yong Zou, Mingxiu Fan, Lin Cheng. Effect of pore parameters on thermal conductivity of sintered LHP wicks. Int J Heat Mass Transf 2012;55:27022706. [CrossRef]
• [4] Pia G, Sanna U. An intermingled fractal unit’s model to evaluate pore size distribution. Appl Therm Engineer 2014;65:330336. [CrossRef]
• [5] Saritas S, Doherty RD, Lawley A. Effect of porosity on the hardenability of P/M steels. Int J Powder Matall 1986;38:3140.
• [6] Daninnger H, Gierl C, Muehlbauer G, Gonzalez MS, Schmidt J, Specht E. Thermal expansion and thermal conductivity of sintered steels- the real effect of porosity. Int J Powder Metall 2011;47:3141.
• [7] Miura S, Terada Y, Suzuki T, Liu CT, Mishima Y. Thermal conductivity of Ni-Al powder compacts for reaction synthesis. Intermetall 2000;8:151155. [CrossRef]
• [8] Gojic M, Suceskka M, Rajic M. Thermal analysis of low alloy Cr-Mo steel. J Therm Anal Calorim 2004;75:947956. [CrossRef]
• [9] Popovska N, Alkhateeb E, Froba AP, Leipertz A. Thermal conductivity of porous Si C composite ceramics derived from paper precursor. Ceram Int 2010;36:22032207. [CrossRef]
• [10] Biceroglu O, Mujumdar AS, Van Heiningin ARP, Douglas WJM. Thermal conductivity of sintered metal powders at room temperature. J Heat Mass Transf 1976;3:183192. [CrossRef]
• [11] Tatar C, Demir NO. Investigation of thermal conductivity and microstructure of Al2O3 particulate reinforced aluminium composites by Powder metallurgy method. Phys B Condens Matter 2010;405:896899. [CrossRef]
• [12] Zivcova Z, Gregorova E, Pabst W, Smith DS, Michot A, Poulier C. Thermal conductivity of porous alumina ceramics prepared using starch as a pore forming agent. J Eur Ceram Soc 2009;29:347–353. [CrossRef]
• [13] Kurt A, Ates H. Effect of porosity on thermal conductivity of powder metal materials. Mater Des 2007;28:230–233. [CrossRef]
• [14] Matsuo H. The effect of porosity on thermal conductivity of nuclear graphite. J Nucl Mater 1980;89:9–12. [CrossRef]
• [15] Ondracek G, Schulz B. The porosity dependence of thermal conductivity for nuclear fuels. J Nucl Mater 1973;46:253–258. [CrossRef]
• [16] Bauer S, Urquhart A. Thermal and physical properties of reconsolidated crushed rock salt as a function of porosity and temperature. Acta Geotech 2016;11:913–924. [CrossRef]
• [17] Liu XL, Song FZ, Xu Q, Luo QY, Tian Y, Li JW, et al. The influence of pore size distribution on thermal conductivity, permeability, and phase change behavior of hierarchical porous materials. Sci China Tech Sci 2021;64:2485–2494. [CrossRef]
• [18] Hossain ME. Role of porosity on energy transport with equal rock-fluid temperatures during thermal EOR process. Arab J Sci Engineer 2017;42:1621–1631. [CrossRef]
• [19] Li KQ, Li DQ, Chen DH, Gu SX, Liu Y. A generalized model for effective thermal conductivity of soils considering porosity and mineral composition. Acta Geotech 2021;16:3455–3466. [CrossRef]
• [20] Hussain EM. Effect of the porosity on a porous plate saturated with a liquid and subjected to a sudden change in temperature. Acta Mech 2018;229:2431–2444. [CrossRef]
• [21] Kandavel TK, Dhasarathy S. Experimental investigation on thermal behaviour of copper-added P/M iron materials at different sintering temperatures. Aust J Mech Engineer 2021;19;5762. [CrossRef]