(遼寧工程技術(shù)大學(xué) 材料科學(xué)與工程學(xué)院，阜新 123000)
摘 要: 利用電弧熔煉法制備TbxDy1-x(Fe0.6Co0.4)2合金(0.27≤x≤0.40)，對(duì)合金的磁性和磁致伸縮性能進(jìn)行研究。利用XRD、交流初始磁化率測(cè)試儀、超導(dǎo)量子干涉儀和標(biāo)準(zhǔn)應(yīng)變測(cè)試儀，對(duì)樣品的物相組成、居里溫度、磁化曲線和磁致伸縮性能進(jìn)行表征。結(jié)果表明:當(dāng)x≤0.27時(shí)合金的易磁化方向?yàn)楱?00？方向，當(dāng)x≥0.30時(shí)合金的易磁化方向變?yōu)楱?11？方向;合金的居里溫度隨x的增加而增加;x=0.32附近時(shí)合金的磁晶各向異性常數(shù)K1有極小值，室溫時(shí)合金在x=0.32附近時(shí)達(dá)到各向異性補(bǔ)償;當(dāng)x=0.32時(shí)飽和磁致伸縮系數(shù)達(dá)到9.57×10-4;隨Co含量的增加，合金的各向異性補(bǔ)償點(diǎn)向Tb含量高的方向移動(dòng)。Tb0.32Dy0.68(Fe0.6Co0.4)2合金具有高磁致伸縮系數(shù)和低各向異性，是一種實(shí)用的磁致伸縮候選材料。
關(guān)鍵字: 磁致伸縮;Laves相;磁性能;各向異性補(bǔ)償
（College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China）
Abstract:The magnetic and magnetostrictive properties of TbxDy1-x(Fe0.6Co0.4)2 (0.27≤x≤0.40)alloys fabricated by arc melting were investigated. The phase, Curie temperature, magnetization curves and magnetostriction of alloys were tested by X-ray diffractometer, AC initial susceptibility, superconducting quantum interference device (SQUID) magnetometer and standard strain gauge technique, respectively. The results show, the easy magnetization direction at room temperature of alloys lies along the á100？ axis in alloys with x≤0.27, while it lies along the á111？ axis as x≥0.30; Curie temperature increases with increasing terbium content; at room temperature the magnetocrystalline anisotropy constant K1 reaches the minimum value at x=0.32, indicating that it is near the composition for anisotropy compensation; the large saturation magnetostriction λs=9.67×10-4 is observed at x=0.32; Co substitution for Fe changes the composition for the anisotropy compensation at room temperature to the Tb-rich side. Tb0.32Dy0.68(Fe0.6Co0.4)2, with high magnetostriction and low anisotropy, is regarded as a good candidate material for magnetostriction applications.
Key words: magnetostriction; Laves phase; magnetic property; anisotropy compensation
