Microstructure Control of Co-Base ODS Alloys

Kazuhiro Takezawa; Shigeharu Ukai; Shigenari Hayashi

doi:10.4028/www.scientific.net/AMR.239-242.864

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242Microstructure Control of Co-Base ODS Alloys

Microstructure Control of Co-Base ODS Alloys

Abstract:

As high-temperature metallic materials, Co-base ODS alloys were produced by means of mechanical alloying, spark plasma sintering and hot rolling. Co-3wt%Al-1.2wt%Hf-ODS alloy was found to be an attractive composite like material, which is formed by spinodal like decomposition. The metastable phases were traced by hard phase containing dense oxide particles and soft one containing less oxide particles. Their tensile stress at 1,000 °C was improved by Hf addition that forms Y₂Hf₂O₇ type oxide particles and shortens their space distance.

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Periodical:

Advanced Materials Research (Volumes 239-242)

Pages:

864-867

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.239-242.864

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Online since:

May 2011

Authors:

Kazuhiro Takezawa, Shigeharu Ukai, Shigenari Hayashi

Keywords:

Co-Al System, Co-Base, Hard and Soft, Nano-Oxide Particle, ODS, Oxide Dispersion, Phase Decomposition

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