Bulk Glassy and Quasicrystalline (Zr65Al7:5Cu27:5)100 xTix Alloys and Their Mechanical Properties
نویسندگان
چکیده
The glass-forming ability (GFA) and thermal stability of (Zr65Al7:5Cu27:5)100 xTix (x 1⁄4 0 15; in at%) alloys have been investigated. It was revealed that a certain amount of Ti addition could improve the GFA of Zr65Al7:5Cu27:5 alloy effectively. The best bulk metallic glass (BMG) forming composition was found at (Zr65Al7:5Cu27:5)93Ti7. Bulk glassy samples with diameter of 7mm were made by means of copper mold casting. Further Ti additions deteriorated GFA and led to the precipitation of icosahedral phase, and 3mm quasicrystalline cylinder was obtained at (Zr65Al7:5Cu27:5)90Ti10. Room temperature compression testing showed that the quasicrystalline alloy had a fracture strength of 1875MPa, being 300MPa larger than that of the (Zr65Al7:5Cu27:5)93Ti7 monolithic BMG. [doi:10.2320/matertrans.MJ200760]
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