搜索

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

注镧Co-Cr合金表面氧化膜生长规律与微观结构表征

靳惠明 Felix Adriana Aroyave Majorri

引用本文:
Citation:

注镧Co-Cr合金表面氧化膜生长规律与微观结构表征

靳惠明, Felix Adriana, Aroyave Majorri

Growth kinetics and microstructure characterization of oxide film formed on La-implanted Co-Cr alloy

Jin Hui-Ming, Felix Adriana, Aroyave Majorri
PDF
导出引用
  • 采用热重分析(TGA)方法研究了离子注镧对Co-40Cr合金在1000℃空气中的恒温氧化和循环氧化行为的影响. 用扫描电镜(SEM)和透射电镜(TEM)对表面氧化膜的微观形貌和结构进行了研究. 用二次离子质谱(SIMS)对合金表面元素铬结合能的变化情况以及氧化膜中元素镧的深度分布进行了测试, 并用激光拉曼谱(Raman)对掺杂镧引起的氧化膜内应力改变进行了测量研究.结果表明, 离子注镧后Co-40Cr合金在1000℃空气中的恒温氧化速率显著降低, 表面Cr2O3
    The isothermal and cyclic oxidizing kinetics of Co-40Cr alloy and its lanthanum ion-implanted samples were studied at 1000℃ in air by thermal-gravimetric analysis (TGA). Scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM) were used to examine the morphology and structure of the oxide film after oxidation. Secondary ion mass spectrum (SIMS) method was used to examine the binding energy change of chromium caused by La-doping and its influence on formation of Cr2O3 film. Laser Raman spectrum was used to examine the stress changes within oxide films. It was found that lanthanum implantation remarkably reduces the isothermal oxidizing rate of Co-40Cr and improves the anti-cracking and anti-spalling properties of Cr2O3 oxide film. The reasons for the improvement were mainly that the implanted lanthanum reduces the grain size and internal stress of Cr2O3 oxide and increases the high temperature plasticity of oxide film. Lanthanum mainly exists in the outer surface of Cr2O3 oxide film in the forms of fine La2O3 and LaCrO3 spinel particles.
    • 基金项目: 国家自然科学基金(批准号:29231011)、哥伦比亚国家自然科学基金(批准号:M018327)及江苏省高校自然科学基金(批准号:07KJD430246)资助的课题.
计量
  • 文章访问数:  7011
  • PDF下载量:  845
  • 被引次数: 0
出版历程
  • 收稿日期:  2007-05-17
  • 修回日期:  2007-05-23
  • 刊出日期:  2008-01-15

/

返回文章
返回