采用水淬法制备了Zr-Ti-Cu-Ni-Be-Co块状非晶合金(BMGs).使用XRD进行相分析,采用热分析仪进行玻璃转变温度、晶化温度和热稳定性等的测定,用SEM观察试样压缩后的外表面和断口形貌.研究了Co对Zr-Ti-Cu-Ni-Be合金非晶形成能力(GFA)、热稳定性及力学性能的影响.结果表明:含Co的所有Zr-Ti-Cu-Ni-Be BMGs都有1个明显的玻璃转变点和宽的过冷液相区(△T).Zr38Ti17Cu10.5Co12Be22.5合金具有和Zr41Ti14Cu12.5Ni10Be22.5合金相当的△T;Co的添加明显提高Zr-Ti-Cu-Ni-Be BMGs的力学性能,含Co量大于10at%的Zr-Ti-Cu-Ni-Be BMGs的压缩断裂强度(σf)超过2 000 MPa,Zr38Ti17Co22.5Be22.5合金的σf达到2 230 MPa,比Zr41Ti14Cu12.5Ni10Be22.5合金的σf提高23%.
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