查询词典 metallic bond

It is illustrated that the state of density in the Earth's interior layers and the result of their distinctness.As the depth increases,temperature and pressure will increase,the composition of metallic bond and covalent bond will increase.

探讨了地球内部各圈层物质的密度状态及其差异的原因，指出了随着深度的增加，即温度和压力的增加，共价键及金属键的键性有增加的趋势。

The results showed that the atomic near neighbour distance varies linearly with the concentration in the substitution solid solutions with ionic and covalent bond, but varies nonlinearly in those with metallic bond.

本论文的目的是研究替代式固溶体中原子近邻结构的规律性。

Covalent bond, ionic bond, metallic interaction and Van der Waals force. Different potentials can be constructed according to the different interactions. For different types of phenomena of some interaction, different potentials can also be constructed. So, a great variety of potentials can be found in literature.

可依据不同类型的相互作用如共价键、离子键、金属键和Van der Waals力等构建不同类型的原子间相互作用势，而且同一类型的相互作用也因所处理的性质或过程(如体积、表面、团簇、缺陷等)不同所采用的形式也不相同，这样就构建了大量的各种形式的原子间相互作用势。

No cracks and holes had been detected. Presence of elements Ni, P and Si were in the simple state of metallic bond Ni, P element and covalent bond SiC, respectively.

元素存在形态主要表现为Ni和P以单质的形式存在，Si以共价健SiC的形式存在，Ni-Ni之间以金属键进行结合。

In high temperature service environment, the metallic element in bond coat is oxidized, and a layer of thermally grown oxide is formed between ceramic top layer and bond coat layer, which mainly is consisted ofα-Al 2 O 3 because of its slow growth rate and good adherence capability.

在高温工作环境下，粘结层的金属元素发生氧化，形成缓慢生长的粘附性能较好的α-Al2O3 ，在陶瓷层与粘结层之间出现热生长氧化层(Thermally Grown Oxide，简称TGO)。

Calculations indicate that Ni-Ni interaction in Ni81B19 alloy is stronger than metallic bond in pure Ni. However, the Ni-Ni interaction in pure Ni is stronger than that in Ni80P20 alloy. Direct B-B contact in Ni81B19 alloys appears in our simulation, however no direct P-P contact in Ni80P20 alloys is found.

其次，在Ni的d电子和B的p电子之间存在着强烈的相互作用，形成Ni原子和B原子间的强共价作用。B和P的加入后使催化反应中的活性位Ni的活性d电子数增加，在合金中起修饰作用。

This implies that the atomic near neighbour distance of metallic bond solid solution is the closet to VCA model among the three solid solutions, although the vegard's law are not followed.

离子键固溶体中第一近邻距随成分的变化量只有近邻距Vegard定律变化量的40％左右，而共价键固溶体只有20％左右，金属键固溶体的变化量最大，一般都在50％以上，甚至高达80％左右。

However, the thermal stability of metallic coordination polymer hardly enhanced in comparison with the polymer never coordinated transitional metallic ions. The reason might be that the energy of coordinate bond formed between metallic ion and polymer was trival in comparison with that of covalent bond in polymer. It started with coordinate bond when the coordinate polymer decomposed under high temperature, so it engendered little for the thermal stability at high temperature.

而金属配聚物较未配位金属的配体高温热稳定性提高不大，可能是由于金属离子与配体之间形成配位键的键能与配位体内的共价键键能相比要小得多，当金属配聚物受热裂解时，首先从配位键开始，因此对高温热稳定性的影响甚微。

It provides a route tothe compounds which contains three functional groups, two carbon-nitrogentriple bonds and one carbon-carbon double bond. In water, metallic indiumpromotes carbon-sulfur bond coupling reaction of aromatic sulfonyl chloride withsuitable organic halides to afford sulfones. In the last chapter, metallic tin mediated allylation of aldimines with allylbromide was revealed.

第三章，我们研究了在水相介质中金属铟促进的烯丙基溴对1，1-二氰基-2-芳基乙烯的Michael加成反应，生成一个含碳碳双键和二个碳氮叁键的三官能团化合物，另外，金属铟在水介质中还可以促进芳基磺酰氯与卤代烃发生碳硫键的偶联，生成砜。

40C. Further ,the effects of ratio of aggerate to bond, aggregate size, bond density and Al/p on the coating wear-resistance property were described in preparing metallic-matric ceramic coating.

研究得出：当结合剂的Al/P为1.4：3、密度为1.63g/cm~3时，向其中加入粗颗粒含量为40%的陶瓷骨料，于A_3钢基体上制备出了耐磨性能优于金属基体的陶瓷涂层。

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。