| 气体雾化Ti3Al基合金的颗粒特征与结晶形貌 |
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| 引用本文： | 徐瑞,崔玉友,李东,胡壮麒,徐达鸣,李庆春.气体雾化Ti3Al基合金的颗粒特征与结晶形貌[J].材料研究学报,1995,9(3):228-232. |
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| 作者姓名： | 徐瑞 崔玉友 李东 胡壮麒 徐达鸣 李庆春 |
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| 作者单位： | 中国科学院金属研究所，哈尔滨工业大学 |
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| 摘 要： | 研究了气体雾化Ｔｉ－２５Ａｌ－１０Ｎｂ－３Ｖ－１Ｍｏ（ａ．％）合金的粉末颗粒特征及快速凝固组织。雾化气体压力大于８ＭＰａ时，Ｔｉ３Ａｌ基合金粉末颗粒圆整，颗粒质量分数与其直径间存在对数正态关系。颗粒表面具有明显的合金结晶特征。其凝固组织具有清晰的二次枝晶，依照冷却速度与二次枝晶间距的关系，得到合金的冷却速度为１０＾３－１０＾５Ｋ／ｓ。
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| 关 键 词： | 快速凝固 凝固组织 颗粒 铝化钛 金属基合金 |
| 收稿时间： | 1995-06-25 |
| 修稿时间： | 1995-06-25 |
THE CHARACTERISTIC AND CRYSTALLINIC MORPHOLOGY OF A Ti_3Al-BASED POWDER PREPARED BY GAS ATOMIZING |
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| XU Rui,CUI Yuyou,LI Dong,HU ZhuangqiXU Daming,LI QingChun.THE CHARACTERISTIC AND CRYSTALLINIC MORPHOLOGY OF A Ti_3Al-BASED POWDER PREPARED BY GAS ATOMIZING[J].Chinese Journal of Materials Research,1995,9(3):228-232. |
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| Authors: | XU Rui CUI Yuyou LI Dong HU ZhuangqiXU Daming LI QingChun |
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| Affiliation: | XU Rui; CUI Yuyou; LI Dong; HU Zhuangqi(Institute of Metal Research. Chinese Academy of Sciences)XU Daming; LI QingChun(Harbin Institute of Techonlogy) |
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| Abstract: | The characteristic and microstructure of rapidly solidified Ti-25Al-10Nb-3V -1Mo (a.%) powder prepared by gas atomizing have been studied in this paper. The powder atomized with gas pressure larger than 8MPa is logarithmic normal function of particle diameter. SEM observation of dendrite on the particle surface shows a obvious characteristic of solidification, which is identical to the micrograph of cross-sectional views. The cooling rate of the powder is 103-105K / s obtained by calculation according to the relationship of cooling rate with secondary dendritic arm space of the powder. |
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| Keywords: | Ti_3Al-based alloy rapid solidification microstructure distribution of particle-size |
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