零热膨胀金属材料研究进展

宋玉柱, 张济民, 周畅, 施耐克, 陈骏

Research Progress on Zero Thermal Expansion Metallic Materials

SONG Yuzhu, ZHANG Jimin, ZHOU Chang, SHI Naike, CHEN Jun

图5 AFe2 (A = Zr、Nb、Hf、Ta、Sc和Ti)体系零热膨胀性能[18,19,21,22,24,26]

Fig.5 Zero thermal expansion properties of AFe2 (A = Zr, Nb, Hf, Ta, Sc, and Ti) systems[18,19,21,22,24,26] (a) comparison of macroscopic linear expansion of Zr0.8Nb0.2Fe2, Fe0.64Ni0.36, and Fe[18] (b) temperature dependence of cell parameters for neutron diffraction and synchrotron radiation analysis of (Zr0.65Nb0.35)0.95Fe0.05Fe2 (ZNFF)[19] (SXRD—synchrotron X-ray diffraction, NPD—neutron powder diffraction, a—cell parameter, αa —thermal expansion coefficient of crystal in a-axis direction) (c) variation of cell parameters of Zr0.7Ta0.3Fe2 with temperature (Δa—change of a,ZTE—zero thermal expansion, FM—ferromagnetic, AFM—antiferromagnetic)[21] (d) relative cell volume of (Sc, Ti)Fe2 varies with temperature when x = 0 (PTE—positive thermal expansion), x = 0.45 (ZTE), and x = 0.6 (NTE—negative thermal expansion)[22] (ΔV / V—relative cell volume variation; CMVE—traditional magnetic volume effect; UMVE—unconventional magnetic volume effect) (e) temperature dependence of unit cell volumes for HfFe2 + δ (δ = 0.3, 0.5, and 0.6)[24] (LTE—low thermal expansion) (f) dilatometer thermal expansion of TiFe2 and Hf0.6Ti0.4Fe2 + x (x = 0, 0.5, and 1.3)[26]