Gd对Fe66Cr2Nb4Y6B22合金的非晶形成能力和力学性能的影响
Effect of Gd on Glass Forming Ability and Mechanical Properties of Fe66Cr2Nb4Y6B22 Alloy
张娜 1张伟 1武彧婷 1向青春 1任英磊 1邱克强1
作者信息
- 1. 沈阳工业大学材料科学与工程学院,辽宁沈阳 110870
- 折叠
摘要
Gd作为优异的中子吸收剂,在中子吸收元素中具有最大的热中子俘获截面.采用铜金属型铸造法研究了Fe66Cr2Nb4Y6-xGdxB22(x=2,4,5,6 at.%)合金的非晶形成能力及力学性能.结果表明:当Gd含量为2 at.%和4 at.%时,两种合金的非晶形成能力分别为3 mm和4 mm.进一步提高Gd含量,合金的非晶形成能力低于3 mm.Fe66Cr2Nb4Y2Gd4B22合金具有最大的非晶形成能力,其过冷液相区ΔTx、约化玻璃转变温度Trg和非晶形成能力判定参数γ均达到最大值,分别为56 K,0.667 3和0.424 1.但是Fe66Cr2Nb4Y6-xGdxB22(x=2 at.%,4 at.%,5 at.%)非晶合金的抗压强度和显微硬度随Gd含量的增加而降低.
Abstract
As an excellent neutron absorber,Gd has the largest thermal neutron capture cross section in the neutron absorbing elements.The amorphous forming ability and mechanical properties of Fe66Cr2Nb4Y6-xGdxB22(x=2 at.%,4 at.%,5 at.%,6 at.%)alloy were studied by copper-mould cast.The results showed that when the Gd content was 2 at.%and 4 at.%,the glass-forming ability of both alloys was 3 mm and 4 mm,respectively.Further increasing the Gd content,the glass-forming ability of the rest alloys was less than 3 mm.The Fe66Cr2Nb4Y2Gd4B22 alloy exhibits the largest glass-forming ability,the corresponding supercooled liquid region,ΔTx,the reduced glass transition temperature,Trg,and the criteria for determining the glass-forming ability,γ,all reached the maximum value of 56 K,0.667 3 and 0.424 1,respectively.
关键词
Fe基非晶合金/Gd添加/非晶形成能力/力学性能Key words
Fe-based bulk metallic glasses/Gd addition/glass-forming ability/mechanical properties引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据