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High entropy alloy as metal additive for hybrid rocket propellant

Mohamad Jamil, Nur Arifah and Mohamaddiah, Ahmad Hadi and Azami, Muhammad Hanafi and Nordin, Norhuda Hidayah (2023) High entropy alloy as metal additive for hybrid rocket propellant. Materials Today: Proceedings, 75 (Part 1 (January 2023)). pp. 140-146. E-ISSN 2214-7853

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A typical solid propellant used in rocket propulsion systems is made from polymeric fuel, crystalline liquid binder and additives. In comparison to conventional propulsion systems, hybrid propulsion is more safe, reliable and environmentally friendly. However, the hybrid systems have some drawbacks, including low fuel regression rates and low combustion efficiency. As a result, several approaches have been developed to increase the rate of solid fuel regression rate including the introduction of metal additives to the system. Nowadays, high entropy alloys (HEA) are among the most advanced materials for high performance applications. This alloy has a potential to replace the existing metal additives in hybrid propulsion systems. The present work proposes a new composition based on Paraffin wax fuel, loaded with high entropy alloy as a metal additive for hybrid propulsion systems using the following ratio of 80:20. Therefore, this research explores the efficacy of high entropy alloys as additives for hybrid propulsion systems. Characterizations and thermal analysis of solid fuel using X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis are carried out to determine the structure, thermal decomposition and energy characteristics of the solid fuel with the HEA as additive. XRD result shows that HEA in a form of solid solutions produces BCC and FCC structures. Thermal analysis of paraffin wax with the addition of HEA gives the maximum value of 136.34 J/g for the total latent heat of the mixture. It is concluded that HEA increases the energy released from the fuel by 86.92 % compared to pure paraffin wax fuel. The mixture of paraffin and HEA fuel has a prospect to be used as future rocket fuel.

Item Type: Article (Journal)
Uncontrolled Keywords: High Entropy Alloys (HEA) Hybrid Rocket Propulsion Metal Additives
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL780 Rockets
T Technology > TP Chemical technology > TP200 Manufacture and use of chemicals
T Technology > TP Chemical technology > TP315 Fuel
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Muhammad Hanafi Azami
Date Deposited: 20 Dec 2022 02:54
Last Modified: 21 Jun 2023 16:06
URI: http://irep.iium.edu.my/id/eprint/101356

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