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采用铜模吸铸法制备不同直径的Fe71Mo5-xNbxP12C10B2(x=1～5)合金棒。利用X射线衍射、差热分析和压缩测试等手段分别研究Nb替换Mo对Fe71Mo5P12C10B2合金的结构、热稳定性及室温力学性能的作用。结果表明:随着Nb含量的增加,合金的玻璃形成能力有所降低,而断裂强度逐步增加;Fe71Mo2Nb3P12C10B2金属玻璃的断裂强度高达4.0GPa,且具有1%的室温压缩塑性。Fe-P-C基块体金属玻璃断裂的强度提高的原因主要是由于Nb替换Mo有利于形成似网格状结构且增强原子间结合力。
Fe71Mo5-xNbxP12C10B2 (x = 1 ~ 5) alloy rods with different diameters were prepared by copper mold suction casting. The structure, thermal stability and room temperature mechanical properties of Fe71Mo5P12C10B2 alloy were investigated respectively by means of X-ray diffraction, differential thermal analysis and compression test. The results show that the glass forming ability of the alloy decreases with the increase of Nb content, while the fracture strength increases gradually. The fracture strength of Fe71Mo2Nb3P12C10B2 glass reaches as high as 4.0GPa and has 1% compressive plasticity at room temperature. The reason why the strength of Fe-P-C bulk metal glass fracture is increased is mainly due to the replacement of Mo by Nb to form lattice-like structure and enhance the binding force between atoms.