Gd对Fe_(66)Cr_(2)Nb_(4)Y_(6)B_(22)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 ofFe_(66)Cr_(2)Nb_(4)Y_(6)B_(22) Alloy

作　　者：张娜[1] 张伟[1] 武彧婷 向青春[1] 任英磊[1] 邱克强[1] ZHANG Na;ZHANG Wei;WU Yu-ting;XIANG Qing-chun;REN Ying-lei;QIU Ke-qiang(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《铸造》2024年第9期1218-1224,共7页Foundry

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Fe_(66)Cr_(2)Nb_(4)Y_(6-x)Gd_(x)B_(22)(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。Fe_(66)Cr_(2)Nb_(4)Y_(2)Gd_(4)B_(22)合金具有最大的非晶形成能力,其过冷液相区ΔT_(x)、约化玻璃转变温度T_(rg)和非晶形成能力判定参数γ均达到最大值,分别为56 K,0.6673和0.4241。但是Fe_(66)Cr_(2)Nb_(4)Y_(6-x)Gd_(x)B_(22)(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。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 Fe_(66)Cr_(2)Nb_(4)Y_(6-x)Gd_(x)B_(22)(x=2,4,5,6 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 Fe_(66)Cr_(2)Nb_(4)Y_(2)Gd_(4)B_(22) alloy exhibits the largest glass-forming ability,the corresponding supercooled liquid region,ΔT_(x),the reduced glass transition temperature,T_(rg),and the criteria for determining the glass-forming ability,γ,all reached the maximum value of 56 K,0.6673 and 0.4241,respectively.

关 键 词：FE基非晶合金 Gd添加 非晶形成能力 力学性能 

分 类 号：TG142[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]