(上海大學(xué) 材料科學(xué)與工程學(xué)院， 上海 200072)
摘 要: 進(jìn)行了10T強(qiáng)磁場(chǎng)下Al-(8%~12%)Ni(質(zhì)量分?jǐn)?shù))合金凝固實(shí)驗(yàn)， 考察了初生相Al3Ni的取向行為。 結(jié)果表明， 加磁場(chǎng)后纖維狀初生相Al3Ni在垂直于磁場(chǎng)方向的平面上定向排列聚集， 形成層間距基本相同的分層組織。 X射線衍射結(jié)果表明， 施加磁場(chǎng)后, Al3Ni晶體發(fā)生了取向， 其〈00l〉晶向轉(zhuǎn)向磁場(chǎng)方向。 在合金兩相區(qū)中， 當(dāng)磁感應(yīng)強(qiáng)度和溫度提高到一定值時(shí)， 初生相的取向程度顯著增加， 其定向排列因子Г也隨之增加。 此外， 還對(duì)晶體在磁場(chǎng)中的取向行為進(jìn)行了熱力學(xué)分析。
關(guān)鍵字: 強(qiáng)磁場(chǎng); Al-Ni合金; 定向排列; 取向
（School of Materials Science and Engineering, Shanghai University,
Shanghai 200072, China）
Abstract: The influence of high magnetic field on the solidification structure of Al-Ni alloys was investigated. The results show that the planes of the platelets of Al3Ni are perpendicular to the direction of the magnetic field. The alignment of Al3Ni phase has critical magnetic intensity and critical temperature. When the magnetic field intensity and temperature exceed the critical values, the alignment degree of Al3Ni phase increases with the increase of magnetic field intensity and the temperature. The results of X-ray diffraction show that the Al3Ni crystal oriented and the c-plane of Al3Ni crystal aligned are perpendicular to the direction of magnetic field.
Key words: high magnetic field; Al-Ni alloy; alignment; orientation
