摘要
在10T强磁场下进行了Al-40%Cu(质量分数)合金重熔凝固实验,并用金相分析方法研究了磁场对凝固组织的影响。实验结果表明,Al-40%Cu合金在10T强磁场中凝固时,析出相A l2Cu形成与磁场方向成一角度的规则排列的平面层状组织。理论分析认为:由于Al2Cu晶体在不同方向的磁化率不同,在磁场中受到磁力矩的作用而转动,晶体的易磁化轴转到能量最低的方向。且在强磁场中,Al2Cu晶粒之间的磁相互作用已达到液态分子间相互作用力的数量级,由于磁相互作用,相邻Al2Cu晶粒相互靠近,并在易磁化方向聚合生长,从而形成规则排列的平面层状组织。
Al-40%Cu Alloy was prepared under a high magnetic field.The solidification behavior of Al-40%Cu alloy was studied by optical microscope.The experimental results show that the precipitating phase Al2Cu formed alignment planar layer structure having a angle with the direction of magnetic field when Al-40%Cu alloy solidified under a high magnetic field of 10T.The theoretical analysis demonstrates that Al2Cu crystals occur a rotation under the action of the magnetic moment caused by the susceptibility difference on different direction in the applied field,and the easy magnetization axis rotates to a direction of the lowest energy.Furthermore,the interaction among the particles can touch the order of the intermolecular force of liquor under a high magnetic field.The neighboring Al2Cu grains approach each other and grow along the easy magnetization direction due to the magnetic interaction,and then the alignment structure has been formed in the applied field.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2011年第4期24-28,共5页
Journal of Aeronautical Materials
基金
国家自然基金(50234020,50225416,59871026)
