摘要
采用涂盐方法研究了不同Cr含量镍基高温合金的热腐蚀过程,利用XRD确定腐蚀产物相结构和采用电子探针观察腐蚀层前沿元素分布情况。结果表明,在900℃涂盐条件下,随着Cr含量增加,合金的热腐蚀抗力逐渐增强。合金中加入Cr后,能促使合金表层形成致密、连续的Cr2O3层,并且随着Cr含量增加,Cr2O3层厚度增加,Al2O3层逐渐向外腐蚀层迁移,从而提高了合金的热腐蚀抗力。
The corrosion process of alloy coated with salt membrane with different Cr content was studied.The phase structure of the alloy was investigated by X-ray diffractometer( XRD) and the elements distribution was observed by electron probe microanalysis( EPMA).The results show that the performance of resisting hot corrosion of alloy at 900 ℃ increases with the increasing of Cr content.Continuous compact Cr2O3layer is formed by adding chromium.Thickness of Cr2O3layer increases and Al2O3layer transfers to outer corrosion layer,so the performance of resisting hot corrosion of the alloy increases.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第S1期58-61,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金资助项目(50901077)
关键词
高温合金
镍基
热腐蚀
Cr
superalloy
Ni-base
hot corrosion
chromium
