材料期刊网

1. 首页
2. 检索结果页

原词结果 | 译词结果

Fe_3Al与水汽及氧气的表面反应

万晓景 , 朱家红 , 黄胜标

金属学报

用ＡＥＳ及ＳＰＳ研究了Ｆｅ３Ａｌ与水汽及氧气表面反应动力学。表明二者的反应速度都很快，且都在１．５×１０－６Ｐａ·ｓ反应即开始当暴露量达１×１０－４Ｐａ·ｓ，水汽与Ｆｅ３Ａｌ反应达到稳定值，反应产物为Ａｌ２Ｏ３．Ｆｅ３Ａｌ与氧气的反应在１．５×１０－５Ｐａ·ｓ时达到稳定，此时主要是Ａｌ的氧化，当暴露量达３×１０－２Ｐａ·ｓ，Ｆｅ３Ａｌ与氧的反应达到第二阶段平衡，此时主要为Ｆｅ的氧化．上述表面反应动力学可用来圆满解释金属间化合物在不同环境气氛中的拉伸结果．

关键词: Ｆｅ_３Ａｌ , surface reaction , Auger electron spectrum , hydrogen embrittlement

SURFACE REACTION OF Ni_3Al WITH WATER VAPOR OR OXYGEN

YX. Chen , X.J. Wan and W.X. Xu (Institute of Materials Sciences , Shanghai University , Shanghai 200072 , China)(Shanghai Iron and Steel Research Institute , Shanghai 200940 , China)

金属学报(英文版)

The kinetics of the surface reactions of single crystal Ni3Al and polycrystal line Ni3Al0.00052 wt% B with water vapor or oxygen was investigated using XPS. Both reactions initiate at less than 1.5×10-6 Pa.s exposure. The reaction of Ni3Al does not saturote with water vapor at 0.43 Pa.s; with oxygen at 8.4×10-2 Pa.s and the oxide formed is Al2O3. The kinetics of these reactions can be used to eaplain the different ductility behavior of Ni3Al-based alloys in various environment.

关键词: Ni_3Al , null , null , null

SURFACE REACTION,HYDROGEN DIFFUSIVITY AND ENVIRONMENTAL EMBRITTLEMENT OF INTERMETALLIC COMPOUNDS Ni_3Al AND Fe_3Al

WAN Xiaojing , ZHU Jiahong , HUANG Shengbiao(Shanghai University. Shanghai 200072 , China)

金属学报(英文版)

The effect of boron doping on the sensitivity to environmental embrittlement of Ni3Al-based alloys was investigated in this paper. The results show that the ductilizing effect of boron in Ni3Al is partly to suppress moisture-induced hydrogen embrittlement.The mechanism of this suppressing effect of boron relates to its severely decreasing the hydrogen diffusivity by boron segregated at the grain boundaries. The surface reaction of Fe3Al with water vapor and oxygen was experimentally confirmed by AES and XPS analysis. The kinetics of these reactions can be used to explain the different ductility behavior of aluminides in various environments.

关键词: : environmental embrittlement , null , null , null

出版年份

刊物分类

相关作者

相关热词