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汝金明,王月美,阮鸿雁,周玉华,许晓静,李建伟.SPS制备Ti-18Mo-xSi合金的高温氧化行为研究[J].稀有金属材料与工程(英文),2020,49(3):1075~1082.[rujinming,wangyuemei,ruanhongyan,zhouyuhua,xuxiaojing and lijianwei.High temperature oxidation-resistance behavior of Ti-18Mo-xSi Alloy prepared by SPS[J].Rare Metal Materials and Engineering,2020,49(3):1075~1082.]
High temperature oxidation-resistance behavior of Ti-18Mo-xSi Alloy prepared by SPS
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Received:January 05, 2019  Revised:June 20, 2019
Key words: Ti-18Mo-xSi alloy  SPS  microstructure  phase composition  oxidation-resistance behavior
Foundation item:江苏省自然科学基金面上项目(BK20181448);国家自然科学基金青年基金(51801073);江苏省高等学校自然科学研究面上项目(17KJB430009);江苏大学高级人才科研启动基金(15JDG150),
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rujinming,wangyuemei,ruanhongyan,zhouyuhua,xuxiaojing and lijianwei  
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      Ti-18Mo, Ti-18Mo-0.5Si, Ti-18Mo-1Si and Ti-18Mo-2Si alloys were prepared by high-energy ball mill and SPS. The effects of Si content on the oxidation-resistance behavior of Ti-18Mo-xSi alloys at high temperature oxidation under 700℃ and 800℃ in air were investigated by analyzing the microstructure, phase composition of sintered and oxidized alloys.The results show that the sintered alloys contain Ti(Mo) solid solution and the alloys with Si contain Mo5Si3 phase. After oxidation at 700℃ and 800℃ for 100 h, the main phases of alloys were TiO2, TiO, MoO2 and MoO3, and the oxidized alloys with Si contain SiO2 phase. The oxidation resistance of Ti-18Mo-xSi alloys at 700℃ is better than that at 800℃. Especially, Ti-18Mo-0.5Si alloy with average oxidation rate of 0.09 g·m-2·h-1and 0.10 g·m-2·h-1 at 700℃and 800℃, respectively. The oxidation resistance of Ti-18Mo-0.5Si alloy is superior to other alloys.