| 93钨合金的稀土改性机理 |
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| 引用本文： | 张朝晖,陈焕德,王富耻,李树奎. 93钨合金的稀土改性机理[J]. 北京理工大学学报, 2010, 30(12): 1492-1496 |
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| 作者姓名： | 张朝晖 陈焕德 王富耻 李树奎 |
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| 作者单位： | 北京理工大学,材料学院,北京,100081;北京理工大学,材料学院,北京,100081;北京理工大学,材料学院,北京,100081;北京理工大学,材料学院,北京,100081 |
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| 摘 要： | 通过粉末冶金方法制备添加质量分数为0.15%稀土元素La,Ce的93W-4.9Ni-2.1Fe合金.测试钨合金在不同应变率下的力学性能,并从粉末冶金动力学的角度分析钨合金的稀土改性机理.结果表明,稀土元素的添加,明显提高了93W合金的动态力学性能;钨合金稀土的改性主要是通过化学反应,将游离态存在的杂质元素氧、硫等转变为较稳定的稀土化合物,减少了杂质元素在钨颗粒与黏结相界面的偏析,提高了二者之间的界面结合强度;稀土元素的加入使得烧结过程中W颗粒的长大速率下降,导致W颗粒尺寸减小,通过降低黏结相中W的溶解度而使液相的黏度减小,流动性变好,液相更易渗入W颗粒间,导致连接度下降.
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| 关 键 词： | 钨合金 稀土元素 力学性能 改性机理 |
| 收稿时间： | 2010-01-19 |
Strengthening Mechanism of 93WNiFe Alloys by Adding Micro Rare Earth Elements |
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| ZHANG Zhao-hui,CHEN Huan-de,WANG Fu-chi and LI Shu-kui. Strengthening Mechanism of 93WNiFe Alloys by Adding Micro Rare Earth Elements[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2010, 30(12): 1492-1496 |
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| Authors: | ZHANG Zhao-hui CHEN Huan-de WANG Fu-chi LI Shu-kui |
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| Affiliation: | ZHANG Zhao-hui,CHEN Huan-de,WANG Fu-chi,LI Shu-kui(School of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | The 93W-4.9Ni-2.1Fe alloys with addition of 0.15% La and Ce were prepared by powder metallurgy method.The microstructures and mechanical properties of the 93WNiFe alloys were examined,and the strengthening mechanisms were investigated.The results indicate that the addition of micro La and Ce into the 93 tungsten alloys can remarkably improve the dynamic mechanical properties of the alloys.The main strengthening mechanisms include the decrease of the free impurity elements of oxygen and sulfur in the alloys,... |
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| Keywords: | tungsten alloys rare earth element mechanical properties strengthening mechanism |
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