【摘 要】
：
Oxide dispersion strengthened(ODS)steel,because of its excellent anti-radiation performance and high temperature mechanical properties,is becoming the most promising structural materials of fusion rea
【机 构】
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School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Institute
【出 处】
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第13届中日双边先进能源系统和聚变裂变工程材料会议(CIS-13)
论文部分内容阅读
Oxide dispersion strengthened(ODS)steel,because of its excellent anti-radiation performance and high temperature mechanical properties,is becoming the most promising structural materials of fusion reactor.A two-step method of mechanical alloying had been carried out to produce 9Cr ODS-CLAM steel based on the China low activation martensitic(CLAM)steel with the addition of Ti-Y2O3 milled powders.This paper mainly focused on pre-milling Ti-Y2O3 mixed alloy powder,to investigate the possible formation mechanism of Y-Ti-O nanoparticles at elevated temperature.In this work,the SEM,TG-DTA,XRD and TEM technology had been used to characterize the pre-milled Ti-Y2O3 powder.The heat flow and XRD results showed that Y2Ti2O7 nanoparticles generated in the Ti-Y2O3 milled powder after heated at 1150℃ for 4 hours.Besides,after hot isostatic pressing of milled CLAM steel powers and Ti-Y2O3 pre-milled powders,it had been found that a large number of Y-Ti-O nanoparticles with the size of~10nm generated in the 9Cr-ODS steel.And the possible formation mechanism of Y-Ti-O nanoparticles has also been discussed.
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