Effect of Oxygen on Phase Evolution in Al-Y2O3 Nanocomposites by Mechanical Alloying

Tatsuaki Sakamoto; Yusuke Jinno; Hiromichi Takebe

doi:10.4028/p-t1wEj4

Paper Titles

Gelation, Vitrification and Shrinkage of Thermoset Polymers - Methods for Investigation and Modelling
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Microstructural and Morphological Evolution of Novel In Situ Al-15%Mg₂Si-4.5%Si Composite with Strontium Addition
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Fabrication and Thermomechanical Processing of Titanium-Based Laminates for Enhanced Performance under High Dynamic Impact
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Phase Field Model of Modification of Microstructure of Al-15Mg₂Si- 4.5Si Composite by Addition of Sr during Semi-Solid Processing
p.23

Effect of Oxygen on Phase Evolution in Al-Y₂O₃ Nanocomposites by Mechanical Alloying
p.29

Microstructures and Properties of Diffusion Layer Formed at Laminated Interface of Alumina-Particle Dispersed Magnesium Laminated Compacts Fabricated by MM/SPS Method
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Mechanical and Thermal Properties of Harmonic Structure Composites with Ti-Ni Alloy and Copper
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Structure of Ta₂O₅containing Phosphate Invert Glasses Prepared by Liquid Phase Method
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In-Situ Observation and Quantitative Evaluation of Dendritic Silver Precipitates Growth inside Borosilicate Glass Substrate
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HomeMaterials Science ForumMaterials Science Forum Vol. 1176Effect of Oxygen on Phase Evolution in Al-Y2O3...

Effect of Oxygen on Phase Evolution in Al-Y₂O₃ Nanocomposites by Mechanical Alloying

Abstract:

To investigate the effect of the oxygen amount involved in mechanical alloying (MA) of Al and Y₂O₃ powders on the phase evolution of the alloy powders, two types of MA were performed: MA with low and high oxygen content in the MA atmosphere. Analyses of the lattice parameter and composition of the Al matrix by X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy, respectively, and the integrated intensity of Y₂O₃ indicated that in the low-oxygen MA, the driving force for Y₂O₃ precipitation was small and Y and O dissolved into the matrix, producing supersaturated solid solution powder, while in the high-oxygen MA, the driving force for Y₂O₃ precipitation was large, resulting in the formation of Y₂O₃-precipitated powder.