(山東理工大學(xué) 材料科學(xué)與工程學(xué)院，淄博 255049)
摘 要: 將交變磁場(chǎng)引入自蔓延反應(yīng)，研究其對(duì)復(fù)合管陶瓷層結(jié)構(gòu)和性能的影響。結(jié)果表明：交變磁場(chǎng)可以促進(jìn)燃燒反應(yīng)的進(jìn)行，但并不改變陶瓷層的相結(jié)構(gòu)。隨著磁感應(yīng)強(qiáng)度的增加，α-Al2O3的枝晶尺寸減小，形態(tài)逐漸向細(xì)小的晶形過(guò)渡。引入交變磁場(chǎng)后，復(fù)合管的抗壓潰強(qiáng)度和抗剪強(qiáng)度均有提高。其中當(dāng)磁感應(yīng)強(qiáng)度為0.20 T時(shí)，抗壓潰強(qiáng)度和抗剪強(qiáng)度達(dá)到418和19.5 MPa，比未引入交變磁場(chǎng)前分別提高了19.1%和21.9%。
關(guān)鍵字: 自蔓延；重力分離；交變磁場(chǎng)；微觀結(jié)構(gòu)；力學(xué)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
