Abstract
Reactive atomization and deposition (RAD) is a new processing technique that has been developed to synthesize dispersion-strengthened materials. The RAD process offers the opportunity for in-situ, continuous control over alloy composition and chemical reactions between atomized droplets and atomization gas. By carefully selecting combinations of alloying additions and reactive gas on the basis of thermodynamic considerations, it is possible to use RAD processing to synthesize materials containing in-situ dispersoids, such as oxides, carbides and nitrides. The objective of the present study is to investigate the creep behavior of the RAD processed polycrystalline Ni{sub 3}Al (Y,B) at elevated temperatures, and thereby identify the rate-controlling mechanisms during creep deformation and the effects of the in-situ oxides that originate from the RAD process.
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