The effects of niobium (Nb) addition on the glass-forming ability (GFA), crystallization behavior, and compressive mechanical property of iron (Fe) - boron (B) - yttrium (Y) alloys have been investigated. Among the (Fe71.2B24Y4.8) 100-x Nbx(x = 0, 2, 4, 6, 8) alloys investigated, (Fe71.2B24Y4.8) 96 Nb4 exhibits the highest GFA, enabling the formation. of glassy rods with a maximum diameter of 7 mm, which is the largest among quaternary Fe-based alloys. The comparison of the crystallization behavior of the alloys shows that the formation of metastable Fe23B6 phase during crystallization in the (Fe71.2B24Y4.8) 96 Nb4 alloy can suppress the formation of other stable crystalline phases such as α-Fe, enhancing the stability of the glass phase. The present results show that the attainment of a significantly high GFA is possible even in a quaternary Fe-based alloy system by properly tailoring the competing crystalline phase by the modification of liquid chemistry.
Bibliographical noteFunding Information:
This work was funded by Creative Research Initiatives of the Korea Ministry of Science and Technology, and one of authors (W.T. Kim) thanks the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea, for financial support.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering