| 机械合金化Ti-Al复合粉末的结构及显微形貌(英文) |
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| 引用本文： | 李学问,孙宏飞,房文斌,丁永峰.机械合金化Ti-Al复合粉末的结构及显微形貌(英文)[J].中国有色金属学会会刊,2011(Z2):338-341. |
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| 作者姓名： | 李学问 孙宏飞 房文斌 丁永峰 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院; |
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| 摘 要： | 研究了不同球磨时间内Ti-Al复合粉末显微结构及成分的演变。随着球磨时间的延长,原始粉末的形貌发生了一系列变化,从球磨2h的扁平状变为球磨6h的细小的等轴状。球磨8h后粉末的晶粒尺寸达到纳米级,平均约为17nm。对钛铝复合粉末的演化机理进行了分析。在球磨过程中,铝逐渐融入钛晶格形成钛的固溶体。球磨不同时间的粉末中钛铝反应的起始温度的差热分析表明,机械合金化细化了复合粉末,显著降低了钛、铝反应的起始温度。
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| 关 键 词： | Ti-Al 复合粉末 机械合金化 |
Structure and morphology of Ti-Al composite powders treated by mechanical alloying |
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| LI Xue-wen,SUN Hong-fei,FANG Wen-bin,DING Yong-feng School of Materials Science , Engineering,Harbin Institute of Technology,Harbin ,China.Structure and morphology of Ti-Al composite powders treated by mechanical alloying[J].Transactions of Nonferrous Metals Society of China,2011(Z2):338-341. |
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| Authors: | LI Xue-wen SUN Hong-fei FANG Wen-bin DING Yong-feng School of Materials Science Engineering Harbin Institute of Technology Harbin China |
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| Affiliation: | LI Xue-wen,SUN Hong-fei,FANG Wen-bin,DING Yong-feng School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | The evolution in microstructure and composition of the milled Ti-Al composite powder with different milling time were investigated. It shows that with the milling time increasing, the initial powder underwent a successive change in its morphology from a flattened shape (2 h) to a fine, equiaxed and uniform one (above 6 h). The milled Ti-Al composite powder was nanocrystalline with the average crystallite size of about 17 nm after milling for 8 h. The evolution mechanism of Ti-Al composite powder was elucida... |
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| Keywords: | Ti-Al composite powder mechanical milling |
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