| (Zr-Cu-Al-Dy)-Ta非晶/结晶复合材料及其力学性能 |
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| 引用本文： | 田昂峰,马朝利,张涛. (Zr-Cu-Al-Dy)-Ta非晶/结晶复合材料及其力学性能[J]. 稀有金属材料与工程, 2008, 0(Z4) |
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| 作者姓名： | 田昂峰 马朝利 张涛 |
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| 作者单位： | 北京航空航天大学; |
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| 基金项目： | 教育部科技创新工程重大项目培育资金项目(705006); 长江学者和创新团队发展计划(IRT0512) |
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| 摘 要： | 在Zr-Cu-Al-Dy合金中添加难熔金属Ta,利用铜模铸造法制备出Zr基非晶/结晶复合材料。复合材料的形成过程可描述如下:在凝固过程中,熔体中首先析出富Ta固溶体,剩余熔体的成分逐渐接近原始非晶合金成分,且非晶形成能力随着富Ta固溶体的析出而提高,最终形成非晶基体。富Ta固溶体多呈树枝晶状分布于非晶基体中,多数树枝晶状的固溶体尺寸大于10μm,远大于剪切带的平均厚度(约10～20nm)。压缩试验结果:非晶/结晶复合材料的宏观塑性变形量从几乎为零提高到13.5%,断裂强度也从1850MPa提高到2050MPa。
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| 关 键 词： | Zr-Cu-Al-Dy合金 非晶/结晶复合材料 断裂强度 塑性变形 |
Synthesis and Mechnical Properties of (Zr-Cu-Al-Dy)-Ta Crystallization/Bulk Metallic Glass Composites |
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| Tian Angfeng,Ma Chaoli,Zhang Tao. Synthesis and Mechnical Properties of (Zr-Cu-Al-Dy)-Ta Crystallization/Bulk Metallic Glass Composites[J]. Rare Metal Materials and Engineering, 2008, 0(Z4) |
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| Authors: | Tian Angfeng Ma Chaoli Zhang Tao |
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| Affiliation: | Tian Angfeng,Ma Chaoli,Zhang Tao (Beihang University,Beijing 100083,China) |
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| Abstract: | A series of bulk metallic glassy/crystalline composites in the (Zr0.48Cu0.4Al0.1Dy0.02) 100-xTax(where x=0, 4, 6) alloy system have been prepared by a copper-mold casting technique with varying the Ta content. The Ta-rich solid solution particles with a dendritic shape embed in the bulk metallic glass matrix. Compared with the monolithic metallic glass, the fracture strength of the composite increases from 1850 MPa to 2050 MPa, and the plastic strain to failure has reached 13.5% in uniaxial compression at t... |
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| Keywords: | Zr-Cu-Al-Dy alloy metallic glass matrix Ta-solid solution fracture strength plastic strain |
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