Role of niobium in the high-temperature oxidation of titanium
Source abstract
Abstract
We compared the oxidation of Ti and Ti-2 at.% Nb at 800 °C in Ar-20% O 2 and in sequential 16O 2- 18O 2 atmospheres to clarify the role of niobium in the high-temperature oxidation of titanium. Niobium had no effect on the amount of oxygen dissolved in the metal or on oxygen diffusion in the metal. Instead, niobium enhanced oxidation resistance by segregating to TiO 2 grain boundaries, where it likely slowed outward Ti diffusion. These findings spotlight doping of TiO 2 grain boundaries as a strategy for improving the oxidation resistance of Ti alloys and, more generally, TiO 2-forming alloys.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear Materials and Properties · High-Temperature Coating Behaviors · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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