| Zr-Al-(Ni-Cu)合金的非晶形成能力及热学性能 |
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| 引用本文： | 张婧,张涛.Zr-Al-(Ni-Cu)合金的非晶形成能力及热学性能[J].北京航空航天大学学报,2010,36(10):1213-1216. |
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| 作者姓名： | 张婧 张涛 |
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| 作者单位： | 北京航空航天大学,材料科学与工程学院,北京,100191;北京航空航天大学,材料科学与工程学院,北京,100191 |
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| 基金项目： | 国家自然科学基金资助项目(50771006);国家自然科学基金重点资助项目(50631010) |
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| 摘 要： | 采用喷射铜模铸造法研究了Ni和Cu含量对Zr-Al-(Ni-Cu)四元合金的非晶形成能力的影响.利用X射线衍射仪分析了铸态合金的相结构,利用差示扫描量热仪研究了非晶合金的热学性能.结果表明:Zr-Al-(Ni-Cu)四元合金的非晶形成能力远大于Zr-Al-Ni和Zr-Al-Cu三元合金的非晶形成能力.Zr65Al7.5Ni10Cu17.5合金显示最高的非晶形成能力,其非晶形成临界直径可以达到7 mm.相似元素Ni和Cu在一定比例下共存,使液态合金的熵值增加,自由能降低,从而有效提高了合金的非晶形成能力.
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| 关 键 词： | 非晶合金 X射线衍射 非晶形成能力 热学性能 差示扫描量热法 相异相似元素共存原则 |
| 收稿时间： | 2009-04-26 |
Glass forming ability and thermal stability of Zr-Al-(Ni-Cu) alloys |
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| Zhang Jing,Zhang Tao.Glass forming ability and thermal stability of Zr-Al-(Ni-Cu) alloys[J].Journal of Beijing University of Aeronautics and Astronautics,2010,36(10):1213-1216. |
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| Authors: | Zhang Jing Zhang Tao |
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| Institution: | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Glass forming ability(GFA) of Zr-Al-(Ni-Cu) alloys with different Ni and Cu element contents was studied by injection copper mold casting method.Structures of the as-cast alloys,sliced along the cross-section,were identified by X-ray diffraction(XRD).Thermal properties of the bulk metallic glasses(BMG) were analyzed by differential scanning calorimetry(DSC).Results reveal that the critical diameters for glass formation of the ternary Zr-Al-Ni and Zr-Al-Cu alloys were highly improved by the coexistence of th... |
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| Keywords: | metallic glass X ray diffraction glass forming ability thermal properties differential scanning calorimetry component coexistence criterion |
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