Mingwei LI
,
Jingchuan ZHU
,
Zhongda YIN
,
Gang ZENG
材料科学技术（英文）
This paper presents a new method to determine the equivalent oxygen diffusivities of particle dispersed composites. This method can be used to design FGM thermal barrier systems with the function of oxygen barrier. A qualitative explanation of the oxidation of nickel with the increment of zirconia contents in the composite samples can be accepted by this method. The values of equivalent oxygen diffusivities obtained with this method are in excellent agreement with those from the EMT method for the composites with ZrO2 particle dispersed phase when the volume fractions of dispersed phase are lower than 25%.
关键词:
Equivalent oxygen diffusivity
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,
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Mingwei LI
,
Jingchuan ZHU
,
Zhongda YIN
,
Xiaoqiang LI
,
Zuyan LIU
,
Jae-Ho Jeon
材料科学技术（英文）
The microstructure evolution of mechanical alloyed Mo-66.7%Si powder using the high-energy ball mill has been studied by X-ray diffraction and scanning electron microscopy. The results showed that MoSi2 can be synthesized by MA of Mo-66.7%Si powder mixtures. Cold welding behavior between Mo and Si powders plays an important role in the preparation of MoSi2 by the MA.
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