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Abstract

The effect of various elements added by ion implantation on the isothermal and cyclic oxidation behaviour of two Nb-containing y-TiAl-based intermetallic alloys, (ie Ti-48Al-2Cr-2Nb and Ti-48Al-2Mn-2Nb) at 900 C in air discussed. During the initial stage of exposure some differences were found between the different implanted elements (ie Si, Nb, Ta, and W). The effect of ion implantation is negligible after longer exposure times. Also for cyclic oxidation experiments, after longer exposure times no differences were found between the non-implanted and the material implanted with various elements. A steady-state condition is reached with a net linear mass loss rate, due oxidation, spallation and re-growth of the oxide scale. The net linear mass loss rate for Ti-48Al-2Mn-2Nb was higher as found for Ti-48-Al-2Cr-2Nb, indicative of a higher susceptibility for cracking and spallation.

Additional information

Authors: HAANAPPEL V A C, JRC Ispra;STROOSNIJDER M F, JRC Ispra
Bibliographic Reference: Article: Journal of Surface Coatings and Technology
Record Number: 199810595 / Last updated on: 1998-05-12
Category: PUBLICATION
Original language: en
Available languages: en
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