+高级检索
含有闭孔的镍基合金涂层压缩过程中的力学性能
DOI:
作者:
作者单位:

中国民航大学 理学院,中国民航大学 理学院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然基金资助项目(51501222),天津市应用基础与前沿技术研究计划资助项目(14JCQNJC06800),中央高校基本科研业务费中国民航大学专项资助项目(3122015L001)


Mechanical properties of porous Ni-based Coating during compress process
Author:
Affiliation:

College of Science,Civil Aviation University of China,College of Science,Civil Aviation University of China

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    利用等离子喷涂和重熔技术制备多孔型镍基自熔性合金涂层,采用扫描电镜、显微硬度计、材料试验机、热膨胀仪等设备对涂层的微观组织、热膨胀系数和压缩过程中的力学性能进行分析。结果表明,涂层中存在封闭孔洞,形态近似球形,直径在30-100 μm;孔隙率由0.53%上升至30.6%时,涂层材料的弹性模量下降69.5%,弹性变形范围上升68.7%;在40-220℃的范围内,多孔涂层的平均线膨胀系数随着孔隙率的增加而下降。球形闭孔的存在提升了原有材料的弹性变形范围,降低了热膨胀系数,使其可以实现低膨胀、高回弹的功能。

    Abstract:

    A porous Ni-based coating was fabricated by plasma spraying and subsequent remelt method. The microstructure, thermal expansion coefficient and mechanical properties during compress process were analyzed by scanning electron microscope (SEM), micro-hardness tester, thermophysical properties instruments and so on. The results show that the closed and spherical pore with 30-100 μm diameter formed in the remelt coating. The elasticity moudulus of the porous coating descend 69.5% and elasticity deforming scope ascend 68.7% with the porocity ascend to 30.6% from 0.53%. The average linear thermal expansion coefficient increased with the decreasing of porosity in the temperature scope between 40 and 220 ℃. The improvment of elasticity deforming scope of Ni-based alloy due to the formation of closed pore resulted in the decline of thermal expansion coefficient, to achieve the purpose of low thermal expansion and high recoverability.

    参考文献
    相似文献
    引证文献
引用本文

丁坤英,于建海.含有闭孔的镍基合金涂层压缩过程中的力学性能[J].稀有金属材料与工程,2018,47(1):219~222.[Ding Kunying, Yu Jianhai. Mechanical properties of porous Ni-based Coating during compress process[J]. Rare Metal Materials and Engineering,2018,47(1):219~222.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2015-11-03
  • 最后修改日期:2016-04-27
  • 录用日期:2016-05-18
  • 在线发布日期: 2018-02-07
  • 出版日期: