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is normally a carbide- or nitride-forming transition metallic element such as Ti or V), M23C6, Z phase, Laves and Sigma phases may exist in the room-temperature microstructure of the WM. A phase structure......
, the ternary MgZnCu phase can be observed with the Cu addition, which is a Laves phase of C15 MgCu2 type with a high melting point and superior thermal stability [18]. Herein, underlying PSN mechanism......
of the Laves phase ZrTiCu2 [J]. Intermetallics. 2008, 16: 651-657. [15] ZIYA A, TAKAHASHI M, OHSHIMA K. The structure and physical properties of CuMPd6 (M=Ti, V, Mn and Fe) ternary alloys [J......
of Mg-5Gd-4Y-0.5Zn-0.5Zr alloy[J]. Materials Science and Engineering A, 2008, 485: 487-491. [54] LIU Y, YUAN G, DING W, LU C. Deformation behavior of Mg-Zn-Gd-based alloys reinforced with quasicrystal and Laves......
carrying out laser cladding of Inconel 718, have observed that high cooling rate lowers the segregation of Nb and reduces the formation of detrimental Laves phase. Figure 7 shows the TEM image of grain......
of Mathematics & Its Applications, 1973, 12: 223-246. [28] HONG S, FU C L. Hydrogen in Laves phase ZrX2 (X=V, Cr, Mn, Fe, Co, Ni) compounds: Binding energies and electronic and magnetic structure......
合金晶体结构的研究表明[33-35],这些结构均可以看成[AB5]和[A2B4]结构单元的层状排列.替代元素在两种单元中的占位存在倾向性,其中最为典型是Mg的替代.Mg在AB5相中几乎不能固溶,但可以形成稳定的Laves结构AB2型结构,Mg在La-Mg-Ni结构中也仅能占据[A2B4]型结构单元.研究表明La-Mg-Ni合金中[A2B4]单元中La-La原子间距较[AB5]单元小,Mg替代La后......
]. The microstructure of these alloys consists of niobium solid solution (Nbss) and brittle intermetallics phases such as α, β, γ(Nb,X)5Si3, (Nb,X)3Si and (Cr,X)2Nb Laves phases ("X" represents Ti, Hf, Al, etc). To date......
and composite material. In 2005, GSCHNEIDNER et al [4] reviewed systematically different families of magnetic materials, such as the lanthanide (R) Laves phases (RM2, where M=Al, Co andNi), Gd5......
结合,由卢一平等[55]首次提出并得到了广泛的关注.通过合理的成分设计,共晶高熵合金通常由具有一定塑性的FCC基体以及具有一定强度的硬质相(如Laves相)构成,这可以有效地改善合金在室温以及高温下强韧性不足的问题. 1.3 高熵合金的特性 根据传统的物理冶金及热力学理论,复杂成分的合金将会形成复杂的多相组织.金属间化合物相及各种无序相可能使材料变脆,阻碍其加工与应用.然而,研究者们发......