白亚平:纳米NiAl相对铁基合金显微组织、力学及氧化性能的影响论文

白亚平:纳米NiAl相对铁基合金显微组织、力学及氧化性能的影响论文

本文主要研究内容

作者白亚平,罗佳佳,李建平,杨忠,郭永春(2019)在《纳米NiAl相对铁基合金显微组织、力学及氧化性能的影响》一文中研究指出:目的通过机械合金化与热压烧结相结合的方法制备含有B2结构纳米NiAl相的铁基合金,研究不同含量(质量分数为30%、40%、50%、60%)的纳米NiAl相,对合金显微组织及力学性能的影响。方法以Ni粉和Al粉为原材料,通过高能球磨法制备B2结构纳米NiAl粉体,采用真空热压烧结炉将NiAl粉体与Fe粉混合烧结,得到块体试样。采用扫描电镜(Scanning electron microscopy, SEM)进行微观组织观察,采用能谱仪(Energy dispersive spectroscopy, EDS)、X射线衍射仪(X-ray diffraction, XRD)以及透射电子显微镜(Transmission electron microscopy, TEM)进行物相分析,并测试不同NiAl含量的铁基合金的硬度、密度、室温压缩性能以及600℃的抗氧化性能。结果合金的硬度、抗压强度随NiAl含量先增后降。当NiAl的质量分数为50%时,合金硬度为35.2HRC,抗压强度为2530 MPa,密度为6.68 g/cm~3,较未添加NiAl时,合金的抗压强度提升了239.6%,密度降低了14.5%。θ=600℃、t=1200min时,其表面氧化增重较纯铁降低了37.9%,此时NiAl相的尺寸约为100~200 nm,组织最为均匀,致密度较高。结论纳米NiAl相在降低铁基合金密度的同时,能有效提升其力学性能与抗氧化性能,但由于B2结构的纳米NiAl相为一种硬脆相,当其含量过高时,会极大程度地降低合金的力学性能。

Abstract

mu de tong guo ji xie ge jin hua yu re ya shao jie xiang jie ge de fang fa zhi bei han you B2jie gou na mi NiAlxiang de tie ji ge jin ,yan jiu bu tong han liang (zhi liang fen shu wei 30%、40%、50%、60%)de na mi NiAlxiang ,dui ge jin xian wei zu zhi ji li xue xing neng de ying xiang 。fang fa yi Nifen he Alfen wei yuan cai liao ,tong guo gao neng qiu mo fa zhi bei B2jie gou na mi NiAlfen ti ,cai yong zhen kong re ya shao jie lu jiang NiAlfen ti yu Fefen hun ge shao jie ,de dao kuai ti shi yang 。cai yong sao miao dian jing (Scanning electron microscopy, SEM)jin hang wei guan zu zhi guan cha ,cai yong neng pu yi (Energy dispersive spectroscopy, EDS)、Xshe xian yan she yi (X-ray diffraction, XRD)yi ji tou she dian zi xian wei jing (Transmission electron microscopy, TEM)jin hang wu xiang fen xi ,bing ce shi bu tong NiAlhan liang de tie ji ge jin de ying du 、mi du 、shi wen ya su xing neng yi ji 600℃de kang yang hua xing neng 。jie guo ge jin de ying du 、kang ya jiang du sui NiAlhan liang xian zeng hou jiang 。dang NiAlde zhi liang fen shu wei 50%shi ,ge jin ying du wei 35.2HRC,kang ya jiang du wei 2530 MPa,mi du wei 6.68 g/cm~3,jiao wei tian jia NiAlshi ,ge jin de kang ya jiang du di sheng le 239.6%,mi du jiang di le 14.5%。θ=600℃、t=1200minshi ,ji biao mian yang hua zeng chong jiao chun tie jiang di le 37.9%,ci shi NiAlxiang de che cun yao wei 100~200 nm,zu zhi zui wei jun yun ,zhi mi du jiao gao 。jie lun na mi NiAlxiang zai jiang di tie ji ge jin mi du de tong shi ,neng you xiao di sheng ji li xue xing neng yu kang yang hua xing neng ,dan you yu B2jie gou de na mi NiAlxiang wei yi chong ying cui xiang ,dang ji han liang guo gao shi ,hui ji da cheng du de jiang di ge jin de li xue xing neng 。

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  • 论文详细介绍

    论文作者分别是来自表面技术的白亚平,罗佳佳,李建平,杨忠,郭永春,发表于刊物表面技术2019年08期论文,是一篇关于合金论文,纳米相论文,显微组织论文,力学性能论文,氧化性能论文,表面技术2019年08期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自表面技术2019年08期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。

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    白亚平:纳米NiAl相对铁基合金显微组织、力学及氧化性能的影响论文
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