在室温下对B2型稀土金属间化舍物YAg和YCu进行拉伸和压缩实验,并利用X射线衍射(XRD)、扫描电镜( SEM)和X射线能谱仪(EDS)对舍金的微观结构和成分进行了观察与分析,探讨了第二相的形成及其对合金性能的影响.拉伸和压缩实验结果显示,YAg和YCu的延伸率分别为7.2%和5.8%,小于所报道的延伸率(δYAg＞20%,δYCu＞10%)；YAg压缩率为45%,YCu为26%.XRD和EDS分析表明,采用商业稀土金属钇制备的YAg和YCu合金中均有RM2(R=Y,M=Ag或Cu)和R2O3类型的第二相存在,在一定程度上可以解释本研究中YAg和YCu合金拉伸塑性降低的原因.
参考文献
| [1] | Russell A M .Ductility in intermetallie compounds[J].Advances in Engineering Materials,2003,5(09):629. |
| [2] | Liu C T;Stringer J;Mundy J N et al.Ordered intermetal lic alloys:An assessment[J].Intermetallics,1997,5(08):579. |
| [3] | Gschneidner K A;Russell A M;Pecharsky A et al.A fa mily of ductile intemetallic compounds[J].Nature Materials,2003,2:587. |
| [4] | A.M. Russell;Z. Zhang;T.A. Lograsso .Mechanical properties of single crystal YAg[J].Acta materialia,2004(13):4033-4040. |
| [5] | Z. ZHANG;A.M. RUSSELL;S.B. BINER .Fracture toughness of polycrystalline YCu, DyCu, and YAg[J].Intermetallics,2005(5):559-564. |
| [6] | Taegon Kim;Kyung Tae Hong;Kyung Sub Lee .The relationship between the fracture toughness and grain boundary character distribution in polycrystalline NiAl[J].Intermetallics,2003(1):33-39. |
| [7] | R.P. Mulay;S.R. Agnew .The fracture behavior of B2 structured MgR intermetallics[J].Scripta materialia,2009(11):1036-1039. |
| [8] | Cao G H;Becker A T;Wu D et al.Mechanical properties and determination of slip systems of the B2 YZn intennetallic compound[J].Acta Materialia,2010,58(12):4298. |
| [9] | Gschneidner K A .Metals,alloys and compounds-high purities do make a difference[J].Journal of Alloys and Compounds,1993,193(01):1. |
| [10] | Albiter A;Salazar M;Bedolla E et al.Improvement of the mechanical properties in a nanocrystalline NiAl intermetallic alloy with Fe,Ga and Mo additions[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2003,347(01):154. |
| [11] | A.M. Russell;Z. Zhang;K.A. Gschneidner Jr. .Mechanical properties of single crystal YCu and (Tb-(0.88)Dy_(0.12))Zn B2 intermetallic compounds[J].Intermetallics,2005(6):565-571. |
| [12] | Cao G H;Shechtman D;Wu D M et al.Determination of slip systems and their relation to the high ductility and frac ture toughness of the B2 DyCu intermetallic compounds[J].Acta Materialia,2007,55(11):3765. |
| [13] | G.H. Cao;Z. Yu .Dislocations in the ductile B2 YAg intermetallic compound[J].Journal of Alloys and Compounds,2009(1):44-46. |
| [14] | J. R. Morris;Y. Ye;Y. -B. Lee .Ab initio calculation of bulk and defect properties of ductile rare-earth intermetallic compounds[J].Acta materialia,2004(16):4849-4857. |
| [15] | Gschneidner K A;Ji M;Wang C Z et al.Influence of the electronic structure on the ductile behavior of B2 CsCl-type ABinterrnetallics[J].Acta Materialia,2009,57(19):5876. |
| [16] | 陈国良;林均品.有序金属间化合物结构材料物理金属学基础[M].北京:冶金工业出版社,1999:234. |
| [17] | Mollmershauser J A;Kabra S;Agnew S R .In situ neutron diffraction of the plastic deformation mechanisms of B2 ordered intermetallic alloys:NiAl,CuZn,and CeAg[J].Acta Materialia,2009,57(01):213. |
| [18] | 丘利;胡玉和.X射线衍射技术及设备[M].北京:冶金工业出版社,2001:103. |
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