王燕涛,姜凤贤,王燕坡,战再吉,王文魁

• 1:燕山大学里仁学院
• 2:天威保变(合肥)变压器有限公司
• 3:亚稳材料制备技术与科学国家重点实验室

摘要(Abstract)：

采用铜模浇铸法制备Hf44.5Cu27Ni13.5Ti5Al10块体非晶合金,并对其进行等温退火处理。利用X射线衍射仪(XRD)和透射电镜(TEM)对非晶合金的晶化行为进行了分析,并通过MTS810实验机及场发射扫描电子显微镜(FESEM)研究了等温退火对合金力学性能的影响。结果表明,该非晶合金等温退火相转变进程为:非晶→非晶+Al16 Hf6Ni7→非晶+Al16 Hf6Ni7+CuTi2→CuHf2+CuTi2。合金断裂强度随退火温度的升高先增大后减小。743 K等温退火后,合金断裂强度达到最大值2400 MPa,弹性应变为3.0%。在Hf44.5Cu27Ni13.5Ti5Al10块体非晶合金压缩断口上观察到纳米级韧窝及周期性条纹结构。随着退火温度的升高,周期性条纹间距逐渐减小直至消失,断口形貌呈现为脆性解理断裂的河流状花样。

关键词(KeyWords)： Hf-基非晶合金;等温退火;周期性条纹;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2010CB731600)

作者(Author): 王燕涛,姜凤贤,王燕坡,战再吉,王文魁

DOI: 10.13289/j.issn.1009-6264.2011.10.006

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