【摘要】 进行了10T强磁场下Al-(8%~12%)Ni(质量分数)合金凝固实验,考察了初生相Al3Ni的取向行为。结果表明,加磁场后纤维状初生相Al3Ni在垂直于磁场方向的平面上定向排列聚集,形成层间距基本相同的分层组织。X射线衍射结果表明,施加磁场后,Al3Ni晶体发生了取向,其〈00l〉晶向转向磁场方向。在合金两相区中,当磁感应强度和温度提高到一定值时,初生相的取向程度显著增加,其定向排列因子Г也随之增加。此外,还对晶体在磁场中的取向行为进行了热力学分析。更多还原

【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.更多还原