Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability

Yunzhuo Lu; Yongjiang Huang; Xing Lu; Zuoxiang Qin; Jun Shen

doi:10.1016/j.matlet.2014.12.117

Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability

Yunzhuo Lu^*
, Yongjiang Huang
, Xing Lu
, Zuoxiang Qin
, Jun Shen

^*Corresponding author for this work

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (C_p) of amorphous and crystalline Fe-Co-Cr-Mo-C-B-Y alloys have been investigated in detail. A parameter, configurational entropy, based on the difference in C_p between BMG and its crystalline counterpart, has been used to correlate with GFA. The alloy containing 7% Co with the lowest configurational entropy is expected to possess the highest viscosity and most ordered atomic structure, which may stabilize the glassy structure, resisting the crystallization and thus enhancing the glass-forming ability of Fe-based BMGs.

Original language	English
Pages (from-to)	191-193
Number of pages	3
Journal	Materials Letters
Volume	143
DOIs	https://doi.org/10.1016/j.matlet.2014.12.117
State	Published - 15 Mar 2015

Keywords

Amorphous materials
Glass-forming ability
Specific heat capacity
Thermal analysis

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10.1016/j.matlet.2014.12.117

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title = "Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability",

abstract = "The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (Cp) of amorphous and crystalline Fe-Co-Cr-Mo-C-B-Y alloys have been investigated in detail. A parameter, configurational entropy, based on the difference in Cp between BMG and its crystalline counterpart, has been used to correlate with GFA. The alloy containing 7\% Co with the lowest configurational entropy is expected to possess the highest viscosity and most ordered atomic structure, which may stabilize the glassy structure, resisting the crystallization and thus enhancing the glass-forming ability of Fe-based BMGs.",

keywords = "Amorphous materials, Glass-forming ability, Specific heat capacity, Thermal analysis",

author = "Yunzhuo Lu and Yongjiang Huang and Xing Lu and Zuoxiang Qin and Jun Shen",

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doi = "10.1016/j.matlet.2014.12.117",

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journal = "Materials Letters",

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TY - JOUR

T1 - Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability

AU - Lu, Yunzhuo

AU - Huang, Yongjiang

AU - Lu, Xing

AU - Qin, Zuoxiang

AU - Shen, Jun

PY - 2015/3/15

Y1 - 2015/3/15

N2 - The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (Cp) of amorphous and crystalline Fe-Co-Cr-Mo-C-B-Y alloys have been investigated in detail. A parameter, configurational entropy, based on the difference in Cp between BMG and its crystalline counterpart, has been used to correlate with GFA. The alloy containing 7% Co with the lowest configurational entropy is expected to possess the highest viscosity and most ordered atomic structure, which may stabilize the glassy structure, resisting the crystallization and thus enhancing the glass-forming ability of Fe-based BMGs.

AB - The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (Cp) of amorphous and crystalline Fe-Co-Cr-Mo-C-B-Y alloys have been investigated in detail. A parameter, configurational entropy, based on the difference in Cp between BMG and its crystalline counterpart, has been used to correlate with GFA. The alloy containing 7% Co with the lowest configurational entropy is expected to possess the highest viscosity and most ordered atomic structure, which may stabilize the glassy structure, resisting the crystallization and thus enhancing the glass-forming ability of Fe-based BMGs.

KW - Amorphous materials

KW - Glass-forming ability

KW - Specific heat capacity

KW - Thermal analysis

UR - https://www.scopus.com/pages/publications/84921026785

U2 - 10.1016/j.matlet.2014.12.117

DO - 10.1016/j.matlet.2014.12.117

M3 - 文章

AN - SCOPUS:84921026785

SN - 0167-577X

VL - 143

SP - 191

EP - 193

JO - Materials Letters

JF - Materials Letters

ER -

Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability

Abstract

Keywords

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