Thermal stability and crystallization behavior of (Fe_0.75 ? xDy_xB_0.2Si_0.05)₉₆Nb₄ (x = 0-0.07) bulk metallic glasses

详细信息    查看全文

• 作者：Jiawei Li^a ; Weiming Yang^a ; ^b ; Mingxiao Zhang^a ; Guoxin Chen^a ; Baolong Shen^c ; ^{blshen@seu.edu.cn}
• 关键词：Bulk metallic glasses ; Thermal stability ; Crystallization behavior ; Glass-forming ability
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2013
• 出版时间：1 April, 2013
• 年：2013
• 卷：365
• 期：Complete
• 页码：42-46
• 全文大小：1029 K

文摘

Effects of Dy addition on the glass-forming ability (GFA), thermal stability, and crystallization behavior in (Fe_0.75 ? xDy_xB_0.2Si_0.05)₉₆Nb₄ (x = 0-0.07) bulk metallic glasses (BMGs) were investigated. The thermal stability of the supercooled liquid was greatly improved by alloying with a small amount of Dy. The largest supercooled liquid region of 100 K was achieved for the x = 0.04 alloy, leading to the best GFA with a diameter of 4 mm. The activation energy for the first crystallization peak increased with the addition of Dy. However, adding more Dy may also increase the frequency factor and change the primary precipitation phase from Fe₂₃B₆ phase into DyFe₁₁Si and DyFe₃ phases, decreasing the thermal stability of the supercooled liquid. The possible relation between GFA and thermal stability, as well as crystallization behavior is discussed.