Microstructural stability of gas-atomized Al-based nanophase composites
Wang, JQ; Tjong, SC
Corresponding AuthorTjong, SC(
AbstractThe microstructure evolution and grain growth behavior, of gas-atomized Al88Ni9Ce2Fe1 nanocomposite materials, were studied by means of the X-ray diffraction, transmission electron microscopy, and differential scanning calorimetry. The results showed that the microstructure of as-atomized powders are affected by the degree of solute supersaturation in matrix, the microstrain contained, the size, distribution and volume fraction of nanophase precipitated, and these are essentially sensitive to the powder particle sizes. Moreover, there appeared to be a two-stage phase transformation during thermal crystallization, i.e., the precipitation of a-Al and the growth of Al-3(Ni, Fe) nanophase in preference to Al11Ce3 nanophase. respectively. Finally, the grain growth kinetics of (x-Al at temperatures of 250 to 300 degreesC, revealed that the volume-diffusion grain growth mechanism with an activation energy of 1.3 eV is controlling in the nanophase materials.
Keywordnanocomposite rapid quenching microstructure grain growth
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000171112800049
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorTjong, SC
Affiliation1.City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, State Key Lab Rapidly Solidified Nonequilibrium A, Inst Mat Res, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Wang, JQ,Tjong, SC. Microstructural stability of gas-atomized Al-based nanophase composites[J]. MATERIALS TRANSACTIONS,2001,42(8):1710-1716.
APA Wang, JQ,&Tjong, SC.(2001).Microstructural stability of gas-atomized Al-based nanophase composites.MATERIALS TRANSACTIONS,42(8),1710-1716.
MLA Wang, JQ,et al."Microstructural stability of gas-atomized Al-based nanophase composites".MATERIALS TRANSACTIONS 42.8(2001):1710-1716.
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