Synthesis of intermetallic Ni3Al Alloy: properties and high temperature oxidation behavior

Ismail, Roslina and Yaacob, Iskandar Idris (2010) Synthesis of intermetallic Ni3Al Alloy: properties and high temperature oxidation behavior. Advanced Materials Research, 97-101. pp. 386-389. ISSN 1022-6680

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Abstract

Two different methods were utilized to synthesize intermetallic nickel aluminide alloy. The first method was combination of powder metallurgy and reaction synthesis (IMC-RS) and the second method was plasma melting to form homogenous plasma melted samples (IMC-PM). XRD patterns for both samples showed complete formation of single phase Ni3Al. Saturation magnetization value for IMC-RS was 0.445 emu/g and IMC-PM was 0.157 emu/g. This was comparable with Ms value of commercial Ni3Al from Alfa Aeser (0.398 emu/g). The reduced elastic modulus, Er value of IMC-PM and IMC-RS were 441.09 MPa. 408.2 MPa respectively. Both samples were exposed to 1%SO2/air gas mixture at 1000°C for 24-hour duration. The isothermal kinetic results for both samples were parabolic indicating rate limiting step. The oxide scales consisted of NiO, NiAl2O4 and Al2O3. © (2010) Trans Tech Publications.

Item Type:	Article (Journal)
Additional Information:	6524/16389
Uncontrolled Keywords:	Al alloys; High temperature oxidation; Isothermal kinetics; Nickel aluminides; Oxide scale; Plasma melting; Rate-limiting steps; Reaction synthesis; Reduced elastic modulus; Single phase; Synthesis of intermetallics; XRD patterns Engineering controlled terms: Aluminum; Nickel alloys; Oxidation; Powder metallurgy; Rapid solidification; Saturation magnetization; Scale (deposits); Synthesis (chemical); X ray diffraction Engineering main heading: Semiconducting intermetallics
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Maryam Hijrah Samsuri (PT)
Date Deposited:	01 Feb 2012 10:21
Last Modified:	01 Feb 2012 10:21
URI:	http://irep.iium.edu.my/id/eprint/16389

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