...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of zirconium purity on the glass-forming-ability and notch toughness of Cu_(43)Zr_(43)Al_7Be_7
【24h】

Effect of zirconium purity on the glass-forming-ability and notch toughness of Cu_(43)Zr_(43)Al_7Be_7

机译：锆纯度对Cu_（43）Zr_（43）Al_7Be_7的玻璃形成能力和缺口韧性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of substituting standard grade zirconium lump (99.8% excluding up to 4% hafnium) for high purity zirconium crystal bar (99.5%) in a Cu_(43)Zr_(43)Al_7Be_7 bulk metallic glass (BMC) is examined. The final hafnium content in the BMG specimens was found to range from 0 to 0.44 at%. Introducing low purity zirconium significantly decreased the glass-forming-ability and reduced the notch toughness of the BMG. In contrast, when adding high purity hafnium to Cu_(43)Zr_(43)Al_7Be_7 made with high purity zirconium, no significant change in the glass-forming-ability or toughness was observed. This suggests that the introduction of low purity zirconium in BMGs creates a more complex response than a simple addition of hafnium. It is likely that other impurities in the material, such as oxygen, play a role in the complex crystallization kinetics and change in mechanical properties. The notch toughness was measured through four-point-bend tests, which showed a decrease in notch toughness from an average of ～53 MPa m~(1/2) for the high purity samples to an average of ～29 MPa m~(1/2) with full substitution of low purity zirconium. A similar decrease in glass-forming-ability and toughness is observed in commercially synthesized high purity Cu_(43)Zr_(43)Al_7Be_7. The large scale commercial process is expected to introduced some unintentional impurities, which decrease the properties of the BMG in the same way as the lower purity elements. Lastly, Weibull statistics are used to provide an analysis of variability in toughness for both ingots synthesized in a small laboratory arc-melter and those synthesized commercially.
机译：研究了在Cu_（43）Zr_（43）Al_7Be_7大块金属玻璃（BMC）中用标准等级的锆块（99.8％，不包括最高4％的ha）代替高纯度锆晶棒（99.5％）的效果。发现BMG样品中的最终ha含量为0至0.44 at％。引入低纯度锆会显着降低BMG的玻璃形成能力并降低缺口韧性。相反，当向由高纯度锆制成的Cu_（43）Zr_（43）Al_7Be_7中添加高纯度ha时，未观察到玻璃形成能力或韧性的显着变化。这表明在BMG中引入低纯度锆会比简单添加of产生更复杂的响应。材料中的其他杂质（例如氧气）可能在复杂的结晶动力学和机械性能变化中起作用。缺口韧性通过四点弯曲测试进行测量，结果表明，缺口韧性从高纯度样品的平均〜53 MPa m〜（1/2）降低到平均〜29 MPa m〜（1 / 2）完全取代低纯度锆。在商业合成的高纯度Cu_（43）Zr_（43）Al_7Be_7中观察到了类似的玻璃形成能力和韧性下降。预计大规模的商业生产过程会引入一些意外杂质，这些杂质会以与纯度较低的元素相同的方式降低BMG的性能。最后，威布尔统计数据可用于分析在小型实验室电弧熔炉中合成的铸锭和在商业上合成的铸锭的韧性变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号