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以二元金属氧化物（氧化铁、氧化钴、氧化镍）和六方氮化硼为反应前驱体，在大腔体压机提供的高温高压条件下（5 GPa、1673 K），通过发生复合高压固相复分解（HPSSM）反应合成组分可调控的三元铁基金属氮化物圆球状块体材料ε-Fe3－xMxN1＋δ（M＝Co，Ni）。并利用X射线粉末衍射（XPD）、场发射扫描电子显微镜（FE-SEM）、高分辨率透射电子显微镜（HRTEM）等多种材料表征手段对高压合成的三元铁基金属氮化物进行结构表征，同时基于密度泛函理论（DFT）的第一性原理计算探究压力对 HPSSM反应的影响。研究结果表明，高压密闭环境有利于制备高质量金属氮化物，HPSSM反应合成法是制备铁基金属氮化物块体材料的一种有效方法。“,”Ternaryε-Fe3-x MxN1+δ(M=Co,Ni)were synthesized as spherical bulk materials with variable components through composite high-pressure solid-state metathesis (HPSSM)reactions under 5 GPa and at 1 673 K,employing diversity binary metal oxides (Fe2 O3 ,CoO,NiO)and hBN as the reaction precursors.The structural characterizations of the as-prepared iron-based metal nitrides were determined by X-ray powder dif-fraction (XPD),field-emission scanning electronic microscopy (FE-SEM)and high-resolution transmission electron microscope (HRTEM),etc.First-principles calculations were used to explore the effect of pressure on the reaction enthalpyΔH in HPSSM.Our results show that the high-pressure confinement environment is favorable for the synthesis of high-quality metal nitrides,and the HPSSM reaction is an effective synthetic route to the bulk iron-based metal nitrides.