共格

VN/（Ti，Al）N纳米多层膜的共格生长与超硬效应

The Coherent Growth and Superhardness Effect of VN / ( Ti , Al ) N Nano-multilayers

通过TEM观察表明，等温马氏体形成时，将优先以原马氏体片共格长大的方式进行。

The observation by TEM showed that the formation of martensite in austempering process is preferentially completed through the coherent growth to prior martensite plate .

体系的共格界面能作为马氏体相变临界驱动力ΔGγ→εMs中的阻力项所占的比例小于10%。

The interfacial energy as a resistance of martensitic transformation is less than 10 % of the critical driving force .

这是因为在长大过程中，Cu颗粒通过孪生过程缓解了由于共格关系而产生的弹性应变能。

This is due to the relaxation , through twinning , of the elastic strain energy accumulated around the Cu particles during their growth .

间隙原子C对共格界面能的影响程度大于N，原因是C、N同置换原子的交互作用不同。

Because of the different interactions between substitutional ( N and C ) and interstitial atoms , N has a greater contribution to the interfacial energy than C atom .

在Fe/Cu超晶格中，Fe、Cu通过形变来实现共格匹配，其晶体结构与Fe、Cu层的厚度比有关。

In superlattices , Fe and Cu layers achieved lattice matching with deformation , the polycrystal structure depends on the ratio of Fe and Cu thickness .

Ti（11）Ni（14）相质点周围的共格应力场对这些相的可逆转变起障碍作用。

The reversible displacement of phase boundaries of these transformations is blocked by the coherent stress field around Ti_ ( 11 ) Ni_ ( 14 ) phase particles .

含氮的Fe-Mn-Si基合金共格界面能的理论计算

Theoretical Calculation of Coherent Interfacial Energy in Nitrogen-Added Fe-Mn-Si Based Alloys

结果表明，小调制周期时，VN/（Ti，Al）N纳米多层膜沿薄膜生长方向呈现出具有面心立方（111）晶面择优取向的共格外延生长结构。

The results reveal that at small modulation periods VN / ( Ti , Al ) N nano-multilayers grow in a polycrystalline epitaxial growth mode with a ( 111 ) preferred orientation .

Fe-Mn-Si基合金共格界面能的离散点阵平面分析

Discrete Lattice Plane Analysis of Coherent Interfacial Energy in Fe-Mn-Si Based Alloys

Al-Si合金能很好地润湿Al2O3纤维，Al-Si合金与Al2O3纤维形成了共格、半共格混合界面；

The analysis of tensile fracture shows that Al-Si alloy wets alumina fibers very well , and that coherent and semicoherent mixed interface is formed .

复合材料的形变过程包含了滑移、孪生、位错增生与迁移以及Ag纤维与Cu基体间形成的共格位相关系和立方-立方协同形变机制。

The deformation process of the composite contains mechanisms of sliding , twining , dislocation increasing and migrating , and cooperating deformation between Cu phase and Ag filaments conditioned by a coherent orientation relationship between them .

而正火态的Cr-Mo轨钢中的Mo2C沉淀已与基体失去共格关系，短纤维状的Mo2C沉淀物对基体起弥散强化的作用。

And the precipitate Mo_2C in the normolized Cr-Mo steel loses the coherence with the matrix , The short thready precipitates Mo_2C can strengthen the matrix by dispersion-strengthening .

由于存在晶格错配，在共格界面作用下，VN和（Ti，Al）N调制层分别受到拉、压应力，在多层膜中产生以调制周期为周期的交变应力场。

An alternating strain field which has the same period with the modulation period was formed because of the lattice mismatch between ( Ti , Al ) N and VN layers during the epitaxial growth .

模型指出：在时效过程中，Al-Cu-Mg合金中析出的θ′相通过台阶机制生长而发生共格失稳，转化成球状的θ相而导致强度显著下降；

The model indicates that θ′ phase precipitated from Al-Cu-Mg alloy grows through ledge mechanism and loses coherence .

高温回火，M2C粗化并失去与基体的共格关系，钢强度下降。

Tempering at higher temperatures resulted in loss of strength was suggested to be the result of precipitate coarsening and loss of the coherent with the matrix .

区和S〃相，与强度开始下降阶段和塑性最低区域对应的组织为S′+S〃+X，这与半共格S′和X的形成有关。

Area and S ″ phases , and the microstructures , corresponding to the begining drop stage of strength curve and the lowest area of plasticity are S ′ + S ″ + X , which is related to semi-coherent S ′ and X.

结果表明，经过480℃×1h时效处理后，在复合材料的基体中形成细小弥散的共格沉淀相，使其硬度提高并得到良好的导电性能。

The experimental results show that fine coherent precipitated phases were formed in the matrix after aging treated at 480 ℃ for 1h , therefore good electrical conductivity and high hardness could be obtained .

计算结果表明：合金基体析出的共格GP区、θ〃相，具有比基体更强的共价键络，提升了合金的整体键络强度。

The results show that the covalence bond-net in the GP zone and θ″ phase coherence with bulk were much stronger than that in bulk , and enhanced the whole covalence bond strength of alloy .

继续增加TiB2层的厚度，TiB2形成非晶态并破坏了与TiN层的共格外延生长，多层膜形成非晶TiN层和非晶TiB2层交替的调制结构，其硬度和弹性模量相应降低。

With increasing TiB_2 layer thickness , amorphous TiB_2 forms and blocks the coherent growth of the multilayers . Consequently , the hardness and elastic modulus of the films decrease gradually .

层状超薄共格结构（LUCS）电子态的紧束缚计算

A tight-binding calculation of electronic states of layered ultra-thin coherent structures

金属-半导体多层超薄共格结构（LUCS）的电子结构

The electronic structure of metal - semiconductor LUCs

Si3N4随层厚的进一步增加又转变为非晶态，多层膜的共格生长结构因而受到破坏，其硬度也随之降低。

Further increasing Si_3N_4 layer thickness , the coherent interfaces of the multilayers were damaged and Si_3N_4 layers become amorphous , accompanied by the decline in the hardness of the films .

究其原因为加入稀土元素Y后，熔体中生成了与镁基体共格的强化相MgY和弥散的析出相改变了断口形貌。

It is suggested that with yttrium addition strengthening MgY phase coherent with magnesium matrix and newly precipitated Al_2Y in the melt , which changes the fracture morphology .

经试验测得了IC218合金（含少量共格γ相的Ni3Al（B）Cr基合金）的回复激活能和再结晶激活能，得到相同的数值：230kJmol。

The activation energy of recovery and recrystallization in IC 218 alloy ( Ni 3Al ( B ) Cr base alloy containing small amount of coherent γ phase ) determined by our test were identical , both being 230kJ / mol.

热处理能显著提高沉积层的硬度和耐磨性，镍磷合金是典型的沉淀硬化型合金，Ni3P相共格析出是其强化的主要原因。

Heat treatment is capable of improving the hardness and wear resistance of the alloy coating remarkably . The Ni-P coating is of typical precipitation-hardened alloy , and the maim reason why the coating can be strengthened is the coherent precipitation of Ni-P particles .

研究发现：共格畸变能为零时，粗化遵循LSW机制，仅仅由颗粒的尺寸大小决定；

The results show that when the coherent strain energy is neglected , coarsening process follows LSW mechanism , which is decided only by the size of the precipitate ;

本文用两种不同的方法估算了Cr-Mo轨钢和Cr-V轨钢中含全碳化物沉淀相与基体的共格稳定性。

The coherent stabilities of the alloy carbide precipitates with the matrix in the Cr-V rail and the Cr-Mo rail steels have been estimated with the two different methods in this paper .

由于基体β′相和沉淀相的晶体结构十分相似，两者的点阵常数又正好是一倍之差，Fe3Al初析出时和基体共格。

As the crystal structure of the matrix and precipitates are very similar and the lattice para - meter of Fe_3Al is twice of that of the matrix , the initially formed Fe_3 Al precipitates are coherent with the matrix .

析出的（Al3Li）与基体共格，键络强度明显提高，其大量均匀弥散析出起到提升基体整体键络强度，对合金产生强化作用。

Since δ′( Al3Li ) is coherence with matrix , the bond net strength is enhanced by the precipitation , and so strengthening the alloy .