Published June 2016 | Version v1
Journal article Metadata-only

Effects of Ti on High Temperature Oxidation of Ni-Based Superalloys

Creators

  • 1. Korea Automotive Technology Institute, Gwangju (Korea, Republic of)
  • 2. Korea Institute of Materials Science, Changwon (Korea, Republic of)
  • 3. Chosun University, Gwangju (Korea, Republic of)

Description

The effects of Ti on the high temperature oxidation of Ni-based superalloys were investigated by cyclic oxidation at 850 ℃ and 1000 ℃. The oxide scale formed at 850 °C consists of Cr2O3, Al2O3, and NiCr2O4 layers, while a continuous Al2O3 layer was formed at 1000 ℃. The oxidation rate of the alloy with higher Ti content was higher than the alloy with less Ti content at 850 ℃, possibly due to the increase in the metal vacancy concentration in the Cr2O3 layer involved by incorporation of Ti4+. However, Ti improved the oxidation resistance of the superalloy at 1000 ℃ by reducing oxygen vacancy concentration in Al2O3 layer.

Additional details

Publishing Information

Journal Title
Corrosion Science and Technology
Journal Volume
15
Journal Issue
3
Series
32 refs, 4 figs, 2 tabs
Journal Page Range
p. 129-134
ISSN
1598-6462

INIS

Country of Publication
Korea, Republic of
Country of Input or Organization
Korea, Republic of
INIS RN
48082140
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM OXIDES; CHROMIUM OXIDES; HEAT RESISTING ALLOYS; NICKEL BASE ALLOYS; OXIDATION; REDUCTION; TITANIUM
Descriptors DEC
ALLOYS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM COMPOUNDS; ELEMENTS; HEAT RESISTANT MATERIALS; MATERIALS; METALS; NICKEL ALLOYS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS