东南大学学报（英文版）2006，Vol.22Issue(1)：125-129,5.
声发射方法研究Co-40Cr合金高温氧化过程的膜/基界面缺陷
Oxide/substrate interfacial defects in high temperature oxidation of Co-40Cr by acoustic emission method
靳惠明 1张剑峰 1Adriana 2C．Felix 2Majorri 3H．Aroyave3
作者信息
- 1. 扬州大学机械工程学院,扬州,225009
- 2. 哥伦比亚国立安第克大学材料工程学院,哥伦比亚麦德林,23715
- 折叠
摘要
Abstract
The isothermal oxidation kinetics of a Co-40Cr alloy and its yttrium ion-implanted samples were studied at 1 000 ℃ in air by thermal-gravity analysis (TGA). Scanning electronic microscopy (SEM) was used to examine the Cr2O3 oxide film's morphology after oxidation. An acoustic emission (AE) method was used in situ to monitor the cracking and spalling of oxide films formed on samples during oxidation and subsequent aircooling stages. A theoretical model was proposed relating to the film fracture process and was used to analyze the acoustic emission spectrum on time domain and the AE-event number domain. It was found that yttrium implantation remarkably reduced the isothermal oxidation rate of Co-40Cr and improved the anti-cracking and anti-spalling properties of Cr2O3 oxide film. The reasons for the improvement were mainly that the implanted yttrium reduced the grain size of Cr2O3 oxide, increased the high temperature plasticity of oxide film, and remarkably reduced the number and size of Cr2O3/Co-40Cr interfacial defects.关键词
氧化/声发射/元素结合能/界面/钇Key words
oxidation/acoustic emission/element binding energy/interface/yttrium分类
矿业与冶金引用本文复制引用
靳惠明,张剑峰,Adriana,C．Felix,Majorri,H．Aroyave..声发射方法研究Co-40Cr合金高温氧化过程的膜/基界面缺陷[J].东南大学学报（英文版）,2006,22(1):125-129,5.
