材料科学
合金
微观结构
扫描电子显微镜
等温过程
相(物质)
氧化物
冶金
能量色散X射线光谱学
衍射
内氧化
亚稳态
复合材料
热力学
光学
物理
有机化学
化学
量子力学
作者
Hao Liu,Yang Zhou,Yuduo Zhang,Chi Zhang
出处
期刊:Rare Metal Materials and Engineering
[Elsevier]
日期:2012-02-01
卷期号:41 (2): 194-198
被引量:6
标识
DOI:10.1016/s1875-5372(12)60026-5
摘要
The microstructure, hardness and isothermal oxidation behavior of CoNiCrAlY alloy modified by addition of 3 wt% and 5 wt% Pt were investigated using scanning electron microscopy, Vickers hardness tester, X-ray diffraction and energy dispersive spectroscopy analysis. The results reveal that Pt has a significant influence on the microstructure of the experimental alloy by formation of β-(Ni,Pt)Al phase. Addition of Pt can slightly increase the hardness of the experimental alloys. Pt will accelerate the phase transformation of alumina from metastable θ-Al2O3 to stable αAl2O3, which is the main reason for the lowering oxidation rate and the formation of a protective oxide scale on the Pt-containing alloys. Furthermore, adding of Pt can improve the Al transport, which suppresses the consumption of βphase and eliminates the internal oxidation.
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