| 用正电子湮没技术研究Zr对Ni_3Al缺陷态的影响 |
| |
| 引用本文： | 谷月峰,邓文,郭建亭,熊良钺,林栋梁.用正电子湮没技术研究Zr对Ni_3Al缺陷态的影响[J].金属学报,1995,31(17):238-240. |
| |
| 作者姓名： | 谷月峰 邓文 郭建亭 熊良钺 林栋梁 |
| |
| 作者单位： | 中国科学院金属研究所，上海交通大学 |
| |
| 摘 要： | 本文用正电子湮没技术（ＰＴＡ）研究了含不同ｚｒ量多晶Ｎｉ３Ａｌ的ｅ＋寿命谱。结果表明：在Ｎｉ３Ａｌ中加入Ｚｒ，一部分Ｚｒ原子进行原子替位，使晶格发生畸变，导致基体中正电子寿命（τ_１）增长；另一部分在晶界偏聚的Ｚｒ调整了晶界结构，使平均寿命（τ）下降。当Ｚｒ量为１．２ａｔ．－％时，缺陷态的寿命τ２显著增长，表明有自由体积较大的缺陷组态生成．
|
| 关 键 词： | 正电子湮没，Ni_3Al，Zr，缺陷态 |
PAT STUDY OF EFFECT OF Zr ON DEFECTS IN Ni_3Al ALLOY |
| |
| GU Yuefong,DENG Wen,GUO Jianting,XIONG Liangyue,LIN Dongliang.PAT STUDY OF EFFECT OF Zr ON DEFECTS IN Ni_3Al ALLOY[J].Acta Metallurgica Sinica,1995,31(17):238-240. |
| |
| Authors: | GU Yuefong DENG Wen GUO Jianting XIONG Liangyue LIN Dongliang |
| |
| Affiliation: | GU Yuefong,DENG Wen,GUO Jianting,(Institute of Meial Research,Chinese A cademy of Sciences,Shenyang )XIONG Liangyue,LIN Dongliang (Institute of Metal Research,Chinese A cademy Sciences. Shenyang )(Shanghai Jiaoiong University,Shanghai ) |
| |
| Abstract: | The effects of Zr on the microdefects in polycrystalline Ni3Al alloys have been investigated by positron annihilation technique (PAT). The results showed that the lifetime (t1) of positron (e+) in matrix dilated because some of Zr atoms substituted for Al sublattice distorted lattice; the mean lifetime decreased because the others of Zr atoms segregated at GB changed its structure. If Zr was increased up to 1.2 at.-%.t2 increased considerably and it means that defects with larger free volume formed. |
| |
| Keywords: | positron annihilation Ni3Al Zr defect |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
|
