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采用电弧熔炼铜模吸铸法制备了晶体相增强的锆基非晶合金复合材料。利用金相显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)等方法研究了MoSi2含量对非晶复合材料的显微组织及力学性能的影响。结果表明,MoSi2的加入改变了合金的晶化行为,生成了Zr2(Cu,Si,Al)晶体相,并且随着含量增加,非晶中的晶体相逐渐增多;MoSi2添加量为3%时的锆基非晶合金复合材料压缩强度最高,达到1650 MPa,明显高于不含MoSi2的锆基非晶合金。锆基非晶合金复合材料中晶体相的存在,阻止单一剪切带的扩展,诱发更多剪切带形成,从而提高材料抗压强度。
The Zr-based amorphous alloy reinforced by crystal phase was prepared by arc melting copper mold suction casting. The effects of MoSi2 content on the microstructure and mechanical properties of amorphous composites were investigated by OM, XRD and SEM. The results show that the addition of MoSi2 changes the crystallization behavior of the alloy and produces a Zr2 (Cu, Si, Al) crystal phase. With the increase of the content, the crystal phase in the amorphous phase increases gradually. When the content of MoSi2 is 3% Zirconia-based amorphous alloy composite has the highest compressive strength of 1650 MPa, which is obviously higher than that of Mo-Zr-based amorphous alloy. The existence of the crystalline phase in the Zr-based amorphous alloy composite prevents the expansion of the single shear band and induces the formation of more shear bands, thereby increasing the compressive strength of the material.