期刊
RARE METALS
卷 34, 期 7, 页码 452-456出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-013-0119-9
关键词
Magnesium alloy; Quasicrystal; Isothermal treatment; Wear resistance; Corrosion resistance
资金
- National Natural Science Foundation of China [51361010]
- Natural Science Foundation of Jiangxi province [196 20114BAB216015]
- Foundation of Jiangxi Educational Committee [GJJ12320]
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201321]
Conventional casting method was employed to prepare Mg-Zn-Y alloy only with alpha-Mg+I-phase; however, the grain size of quasicrystal is quite large in the as-cast state. Therefore, isothermal treatment was applied to refine the quasicrystal phase. The result shows that after the Mg-Zn-Y alloy was isothermally treated at 500 degrees C for several hours, the coarse quasicrystal can be gradually dissolved and thus refined. Generally, the dissolving processes of quasicrystal are slow first and then accelerate; after isothermally treated with 8 h at 500 degrees C, the quasicrystal is almost completely dissolved into the matrix only with 1-5 mu m tiny quasicrystals remained. Refinement of quasicrystal can markedly reduce the wear resistance, but increase the corrosion resistance.
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