(山东理工大学 材料科学与工程学院，淄博 255049)
摘 要: 将交变磁场引入自蔓延反应，研究其对复合管陶瓷层结构和性能的影响。结果表明：交变磁场可以促进燃烧反应的进行，但并不改变陶瓷层的相结构。随着磁感应强度的增加，α-Al2O3的枝晶尺寸减小，形态逐渐向细小的晶形过渡。引入交变磁场后，复合管的抗压溃强度和抗剪强度均有提高。其中当磁感应强度为0.20 T时，抗压溃强度和抗剪强度达到418和19.5 MPa，比未引入交变磁场前分别提高了19.1%和21.9%。
关键字: 自蔓延；重力分离；交变磁场；微观结构；力学性能
（School of Material Science and Engineering, Shandong University of Technology, Zibo 255049, China）
Abstract:Altering magnetic field was introduced into SHS, and the effect of altering magnetic field on structure and properties of ceramic layer of compound pipe was studied. The results show that the combustion is improved and the phases are remained. The size of α-Al2O3 decreases with increasing magnetic flux density, and transforms into fine grains. The press strength and shearing strength increase with increasing magnetic flux density. And when the magnetic flux density is 0.20 T, the press strength and shearing strength are 416 and 19.2 MPa, respectively, , which are 19.1 % and 21.9% more than those without altering magnetic field, respectively.
Key words: self-propagate high-temperature synthesis; gravitational separation; altering magnetic field; microstructure; mechanical property
