一种高塑性可降解LiZn₄-X金属间化合物及其制备方法。所述X元素为Cu，Mg，Ca，Sr，Mn，Fe，Ag，Co，Cr，Ti，Sn，Si，Se或Ge中的一种或多种，余

量为β-LiZn₄相。通过真空熔炼制备，热处理、塑性变形工艺以及低温时效一系列加工工艺对金属间化合物进行改性。合金经高温热处理后由多晶和晶内Zn+β-LiZn₄片层组织多级结构构成。本发明金属间化合物组织均匀，所获得金属间化合物的室温拉伸屈服强度为200～500MPa，抗拉强度为450～800MPa、延伸率为1840％；室温压缩屈服强度为500～800MPa，抗压强度为1000～2000MPa、延伸率为15～45％。在模拟体液中降解均匀，降解速率0.008～0.5mm/y；所含元素为生物安全元素，对L929成骨纤维细胞和MG63细胞毒性低于2级，满足多种人体植入器件材料的使用要求。该LiZn₄-X金属间化合物性能优异、降解均匀且具有良好的生物相容性。

The invention relates to a highly plastic degradable LiZn₄-x intermetallic compound and a preparation method thereof. The X element is one or more of Cu, Mg, Ca, Sr, Mn, Fe, Ag, Co, Cr, Ti, Sn, Si, Se or Ge,the quantity is LiZn₄ phase. The intermetallic compounds were modified by vacuum smelting, heat treatment, plastic deformation and low temperature aging. After high temperature heat treatment, the alloy is composed of polycrystalline and intercrystalline Zn+ LiZn₄ lamellar structure. The intermetallic compound has uniform structure, and the tensile yield strength of the obtained intermetallic compound at room temperature is 200 ~ 500MPa, the tensile strength is 450 ~ 800MPa, and the elongation is 1840%. At room temperature, the compressive yield strength is 500 ~ 800MPa, the compressive strength is 1000 ~ 2000MPa, and the elongation is 15 ~ 45%. The degradation rate was 0.008-0.5mm /y in the simulated body fluids. The elements contained are biosafety elements, and the toxicity to L929 osteofibroblasts and MG63 cells is lower than grade 2, which can meet the requirements of various human implant materials. The LiZn₄-X intermetallic compound has excellent properties, uniform degradation and good biocompatibility.