Evaluation of Thermal Properties of The Fe 80 Cr 20 Nanostructure for Interconnect Application in High Temperature A.M. Leman 1,a , Dafit Feriyanto 2,b , M.N.M Salleh 3,c and I Baba 1,d 1 Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, 86400 Johor, Malaysia 2 Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, 86400 Johor, Malaysia 3 Faculty of Computer Science and Information Technology, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia a mutalib@uthm.edu.my, b dafitferiyanto@yahoo.co.id, c najib@uthm.edu.my, d ishak@uthm.edu.my Keywords: Particle size, thermal stability, Fe 80 Cr 20 alloys, ultrasonic treatment, ball milling Abstract. Metallic Fe 80 Cr 20 alloy in thermal stability analysis is investigated. Approached method is combination technique (milled and UT) of ball milling (milled) combined with ultrasonic technique (UT) which is not yet fully explored. From Energy Dispersive x-ray Spectroscopy (EDS) analysis resulted that the composition of 80 wt% Fe and 20 wt% Cr in individual particle was achieved at milled and UB 4.5 h sample. Higher thermal stability of treated samples approximately 63% at 1100 0 C temperature operation which showed by milled and UT at 4.5 h when compared to raw material. Combination technique shown high prospect to advance exploration in improving thermal stability which suitable for interconnect application. Introduction Nowdays, the metallic material is more interest as compared to ceramic material when operated in high temperature interconnect Solid Oxide Fuel Cell (SOFC) [1, 2]. Ferritic steel is became recommended material for interconnector since good fabricability, low Area Specific Resistance (ASR) and their Coefficient Thermal Expansion (CTE) which is compatible with other SOFC components (anode, cathode and electrolyte) [2, 3]. Nano scale material is become very important field in material science recently [4] due to physical, chemical and mechanical properties can be utilized as the main building of innovative solution for the problems in energy, environment, health and communication [5]. Therefore, Thermal stability nanomaterial is produced in industrial scale and widely used in different field of science and technology. FeCr alloy as ferritic steel is explored by researchers in high temperature (up to 1000 0 C) application due high thermal stability, high corrosion resistance which provided by oxide scale (Cr 2 O 3 ) in surface layer and promote the formation of full dense material [6, 7]. The chromium content of protective single phase layer at least 17-20% which is depend on temperature, surface treatment and minor alloying addition [7, 8]. Developing Fe 80 Cr 20 nanocrystalline is required since its properties in long term oxidation [9, 10]. It conducted using high energy ball milling which is able to synthesis the single phase FeT(T=Cr, Cu and Ni) binary alloy. However, the agglomeration particle and degradation of stack performance is inevitable [11, 12]. Therefore, there are several studies performed in order to brake the agglomerate and improve the conductiviy of oxide scale or developing oxide layer which led to reducing mass gradation in high temperature [8]. In addition, growth rate is obserbve when consolidation process [13 - 15]. Braking agglomerates or improving homogenous is promoted by using ultrasonic technique [16 - 17] and improving high thermal stability of FeCr alloy is achieved when it in nanorange size [9, 10], Lanthanum (La) implantated [18, 19] and through nickel electroplating [20]. Therefore, increasing properties of raw material is needed. This research approched new technique which coupled between high energy ball milling and utrasonic technique which is not yet investigated. Proposed technique is expected that Fe 80 Cr 20 nanocrystructure alloy, good composition and high thermal stability in high temperature will be achieved. Applied Mechanics and Materials Vol. 815 (2015) pp 193-197 Submitted: 2015-08-27 © (2015) Trans Tech Publications, Switzerland Accepted: 2015-09-01 doi:10.4028/www.scientific.net/AMM.815.193 All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications, www.ttp.net. (ID: 103.31.34.2-15/10/15,03:03:20)