Transactions of Nonferrous Metals Society of China, 2006-02, Vol.16 (1), p.98-104
2006
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Details
- Autor(en) / Beteiligte
- Titel
- Aging microstructural characteristics of ZA-27 alloy and SiCp/ZA-27 composite
- Ist Teil von
- Transactions of Nonferrous Metals Society of China, 2006-02, Vol.16 (1), p.98-104
- Ort / Verlag
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
- Erscheinungsjahr
- 2006
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- The aging characteristics of as-quenched microstructures of ZA-27 alloy and SiCp/ZA-27 composite（ZMCp） were investigated using SEM, EDS and TEM. The structure, morphology and size of sub-grains in primary dendrite in ZMCp continuously change during aging process. Little tiny spherical Zn-rich η phase distributes in the dendrite. Amount of transitional a＇ phase, well coherent with equilibrium αf phase, in SiCp-neighboring dendrite edge zone is less than that in dendrite center zone. Both eutectic and peritectic β phase transform into lamellar a and η phases, obeying [2113] η//[ 110]α, and （002）α//（1 1 01）η In the like-eutecticum of ZMCp, less amount of β phase and decomposition products are found. The size of α phase decomposed from peritectic β phase in ZMCp is obviously larger than that in the monolithic alloy. The lamella decomposition of β phase beside SiCp is evidently more rapid than that in the alloy. SiC particulates strongly accelerate neighboring β phase decomposition in aging process.