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| 1 | Mechanical properties of Mg-8Gd-3Y-0.5Zr alloy with bimodal grain size distributions显示文摘The Mg-Gd-Y-Zn-Zr alloys are representational and potential age-hardening systems as reported in the past ten years,but their mechanical properties are still dependent on the grain size and its distribution.The effect of bimodal structure on mechanical properties of Mg-8Gd-3Y-0.5Zr alloy with bimodal grain size distributions was investigated.The results suggested that the volume fraction of fine grain(FG)and coarse grain(CG)could be controlled by combined processes of hot forging,extrusion and annealing.And for the present alloys with bimodal grain size distribution,the improvement of strength is still attributed to the grain refinement.The morphology of bimodal grain size distribution has a marked impact on the ductility of the alloy,i.e.with the increase of coarse grain volume fraction,the elongation to failure increases at the beginning and then decreases.The mechanism of the toughening effect of bimodal grain size distribution on the Mg-Gd-Y-Zn-Zr alloys with bimodal grain size structure has been discussed. | J.H.He L.Jin F.H.Wang S.Dong J.Dong | 2017 | Journal of Magnesium and Alloys2017，5，4： | 15 |
| 2 | Visible‐Light Photocatalytic Properties of Weak Magnetic BiFeO显示文摘 | F.Gao X.?Y.Chen K.?B.Yin S.Dong Z.?F.Ren F.Yuan T.Yu Z.?G.Zou J.‐M.Liu | 2007 | Adv Mater2007，，19： | 1 |
| 3 | 查看详情显示文摘 | N.Zhang S.Dong J.M.Liu | | 0，，04： | 1 |
| 4 | 查看详情显示文摘 | S.Dong R.Yu S.Yunoki J.M.Liu and E.Dagotto | | 0，，15： | 1 |
| 5 | 查看详情显示文摘 | Y.J.Guo S.Dong K.F.Wang J.M.Liu | | 0，，24： | 1 |
| 6 | 查看详情显示文摘 | N.Zhang S.Dong G.Q.Zhang L.Lin Y.Y.Guo J.M.Liu and Z.F.Ren | | 0，，01： | 1 |
| 7 | 查看详情显示文摘 | N.Zhang Y.Y.Guo L.Lin S.Dong Z.B.Yan X.G.Li and J.M.Liu | | 0，，10： | 1 |
| 8 | 查看详情显示文摘 | G.Q.Zhang S.J.Luo S.Dong Y.J.Gao and J.M.Liu | | 0，，： | 1 |
| 9 | Ferrielectricity in DyMn_(2)O_(5):A golden touchstone for multiferroicity of RMn_(2)O_(5) family显示文摘The RMn_(2)O_(5) manganite compounds represent one class of multiferroic family with magnetic origins,which has been receiving continuous attention in the past decade.So far,our understanding of the magnetic origins for ferroelectricity in RMn_(2)O_(5) is associated with the nearly collinear antiferromagnetic structure of Mn ions,while the exchange striction induced ionic displacements are the consequence of the spin frustration competitions.While this scenario may be applied to almost all RMn_(2)O_(5) members,its limitation is either clear:the temperature-dependent behaviors of electric polarization and its responses to external stimuli are seriously materials dependent.These inconsistences raise substantial concern with the state-of-the-art physics of ferroelectricity in RMn_(2)O_(5).In this mini-review,we present our recent experimental results on the roles of the 4f moments from R ions which are intimately coupled with the 3d moments from Mn ions.DyMn_(2)O_(5) is a golden figure for illustrating these roles.It is demonstrated that the spin structure accommodates two nearly collinear sublattices which generate respectively two ferroelectric(FE)sublattices,enabling DyMn_(2)O_(5) an emergent ferrielectric(FIE)system rarely identified in magnetically induced FEs.The evidence is presented from several aspects,including FIE-like phenomena and magnetoelectric responses,proposed structural model,and experimental check by nonmagnetic substitutions of the 3d and 4f moments.Additional perspectives regarding possible challenges in understanding the multiferroicity of RMn_(2)O_(5) as a generalized scenario are discussed. | J.-M.Liu S.Dong | 2015 | Journal of Advanced Dielectrics2015，5，2： | 0 |
| 10 | 干冰冲击在超音速火焰喷涂厚WC-Co涂层中的应用显示文摘超音速火焰喷涂过程中产生的残余应力会限制涂层的厚度。在研究中,为了获得高质量WC-Co厚涂层,在超音速火焰喷涂过程中采用了干冰冲击技术,这主要是由于干冰冲击对涂层产生了高效冷却和机械锤平。本研究采用X射线衍射,扫描电镜和能谱能对粉末和涂层得微观结构和相分布进行表征。此外,本文对涂层的硬度、抗滑动摩擦等性能也进行了研究。最后我们得出结论,干冰冲击能有效地细化晶粒尺寸,提高涂层硬度,致密度和抗滑动摩擦性能。本研究采用超音速火焰喷涂和干冰冲击联合的工艺方法喷涂WC-Co粉末,以提高冷却效率和喷涂过程中的类喷丸效应。该方法也可以用来制备厚的WC-Co涂层。本文还研究了涂层的微观组织、相组成和摩擦磨损性能。 | S.Dong B.Song B.Hansz H.Liao C.Coddet Belfort 曾瑞霖 | 2015 | 热喷涂技术2015，0，2： | 0 |
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