查询词典 metallic bond

May be an electrovalent bond , covalent bond and metallic bond mark like chemistry key.

化学键一般可分为离子键、共价键和金属键。

Usually, they are suitable to mixed crystals with metallic bond but not to those with covalent bond or ionic bond.

上述近似方法通常适用于金属键混晶系统，但对于共价键或离子键混晶系统计算结果则不理想。

The result also indicated that variation in atomic neighbour distance with concentration is about 40 percent and 20 percent, respectively, for ionic bond and covelent bond solid solutions, compared with that expected by the near neighbour vegard's law, while in the metallic bond solid solutions, this exceeds 50 percent, even reaches 80 percent 〓 so.

用虚晶格近似模型来描述固溶体中的原子近邻结构是不恰当的，然而原子近邻距的加权平均却与VCA值一致，这说明固溶体晶胞参数随成分的变化规律是由原子近邻距随成分的变化规律所决定的。

A lot of energy is required to break the strong metallic bond in the giant metallic lattice.

打开巨型金属晶格中的强金属键需要大量的能量。

The metallic material builtup by the metallic bond, its interior has massive free electron, therefore the electrical conductivity is good;When distortion the bond is not destroyed, therefore the plasticity is good

金属材料以金属键结合，，内部有大量能自由运动的电子，所以导电性好；在形变时键不被破坏，所以塑性好

The metallic bond has made develop the energy band theory arriving at a metallic bond , concrete annotation of model angry from classical free electron the nature that the metallic bond forms and metal crystal physical property.

金属键由经典的自由电子气模型发展到金属键的能带理论，具体地诠释了金属键形成的本质与金属晶体的物理性质。

"Metallic bond",The positively charged ion cores are held together by mutual attraction to the electron, thus producing a strong metallic bond.

"，"带正电荷的离子核，彼此相互吸引对方电子，因此产生很强的键接称为金属键。

Crystal lattice constants are close to other experiment results. Three kinds of chemical bonds exist among Mg and B atoms, between magnesium and boride is ionic bond and metallic bond is the predominant interaction in the layer formed by magnesium atoms. A strong covalent bond in the form of sp2 hybrid between boride atoms is the most important factors which can affect the transition temperature of MgB2. Population analysis clearly shows that electrons are transferred from Mg to B, as a result, the electron-phonon coupling in the layer of B is very strong.

规范保守赝势的计算结果表明，晶格常数与实验值误差在很小的范围内，分析了引起MgB2(001)面结构超导转变时电子浓度和偏态密度的变化情况，发现构成该超导体结构的成键有3种，着重从结构的电子浓度变化分析了其超导特性，六角蜂窝状结构中硼原子间相互作用为sp2杂化的共价键，镁原子和硼原子之间是离子键结合，镁原子层是金属键结合，镁原子的价电子部分转移到硼原子的pz轨道，部分电子为镁原子层共用。

A metallic bond layer material added with rare-earth La used for a high temperature brazing CBN grinding wheel belongs to the technical field of metallic material engineering and relates to the technical field of superhard tool high temperature brazing.

一种添加稀土La的高温钎焊CBN砂轮用金属结合剂层材料，属于金属材料工程技术领域，涉及到超硬工具高温钎焊技术领域。

The bonding energy of the mixed covalent/metallic Ti-Al bond for the Ti-terminated Al/TiB_2 interface is larger than that of the polar covalent Al-B bond with partial ionic-like feature for the B-terminated interface. Metallic bond between Al atoms forms across the Al/AlB_2 interface, which results in weaker interfacial adhesion than that for the Al/TiB_2 interface. The interfacial energy for Al/TiB_2 depends on the interfacial chemical potential.

Al熔体中仅存在TiB_2粒子，而无多余溶质Ti时，α-Al在TiB_2粒子上异质形核产生的Al/TiB_2界面能大于α-Al从Al熔体中直接形核时的液-固界面能，不满足TiB_2粒子充当α-Al有效异质形核核心的能量条件，这从理论上解释了Al熔体内仅存在TiB_2粒子时无晶粒细化效果的实验现象。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。