As a relative newcomer in the glass family,metallic glass challenges our standpoint on crystalline metals and extends our knowledge concerning the nature of glasses[1].Metallic glasses have attracted considerable attention because of their unique mechanical,physical,and chemical properties[2-4].Newly developed bulk metallic glass can combine toughness and strength beyond the benchmark ranges established by the As a relative newcomer in the glass family, metallic glass challenges our standpoint on crystalline metals and extends our knowledge concerning the nature of glasses [1]. Metallic lenses have attracted considerable attention because of their unique mechanical, physical, and chemical properties [2- 4] .Newly developed bulk metallic glass can combine toughness and strength beyond the benchmark ranges established by the