The Specific Heat Capacity and Oxidation Kinetics of NiAl, FeAl and TiAl Alloys

Abstract:

The specific heat capacity was calculated by DSC and the kinetics of oxidation was determined for alloys from the NiAl, FeAl and TiAl phase equilibrium system. The Ti48Al alloy contained an addition of 2 at.% of chromium and niobium. The highest value of heat capacity had the Ti-Al and Fe-Al alloys. At temperatures above 673K, the Ti48Al alloy showed an anomaly, that is, a lower value of the heat capacity. The change in heat capacity was related with an exothermic reaction. The oxidation of alloys was running according to either parabolic or cubic law. Alloys characterised by high thermal capacity showed a higher gain in weight. The slowest to oxidise was the Ni₃Al intermetallic phase.

• Periodical: Solid State Phenomena (Volumes 203-204)
• Pages: 431-434
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.203-204.431
• Online since: June 2013
• Authors: Jaroslaw Piątkowski, Roman Przeliorz, Magda Jabłońska
• Keywords: Heat Capacity, Intermetallic Phase, Oxidation Kinetics

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