Abstract
The surface oxide film on Ti powder consists of TiO2, Ti2O3, and TiO and starts to dissolve into the titanium matrix underneath from ~ 943 K (670 °C). LaB6 can scavenge O prior to the active dissolution of the surface oxide film. The scavenging process begins by forming an interfacial LaBO3 layer due to reaction between surface oxide layer and LaB6, followed by diffusion of oxygen through the LaBO3 layer. The unique oxygen-scavenging feature of LaB6 produces better tensile elongation.
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