Microstructure Control of Co-Base ODS Alloys
Microstructure Control of Co-Base ODS Alloys
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DOI：
10.4028/www.scientific.net/amr.239-242.864
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
K. Takezawa;S. Ukai;S. Hayashi
中科院分区：
文献类型：
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作者：
K. Takezawa;S. Ukai;S. Hayashi
采用机械合金化、放电等离子烧结、热轧等方法制备了钴基ODS合金。Co-3wt%Al-1. 2 wt %Hf-ODS合金是一种有吸引力的类复合材料，它是通过类调幅分解形成的。亚稳相由含有致密氧化物颗粒的硬相和含有较少氧化物颗粒的软相组成。它们在1，000 °C下的拉伸应力通过Hf添加而改善，Hf添加形成Y2 Hf 2 O 7型氧化物颗粒并缩短它们的空间距离。
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.