密排六方结构

用透射电镜分析新相的具体组成和结构发现，这种新相是由Mg和Sb生成的金属间化合物Mg3Sb2，具有密排六方结构。

The result of TEM analysis indicated that the new phase was Mg_3Sb_2 particle , which has the close-packed hexagonal structure .

结果表明膜层组织均匀，晶粒细小，薄膜AIN是呈（002）择优取向的密排六方结构。

The results show that the microstructure of the film is uniform and the grain size is fine . AlN film is the close-packed hexagonal structure with ( 002 ) preferred orientation .

生成的Mg3Sb2相与α-Mg基体具有相同的密排六方结构，满足非均匀形核的基本条件，是良好的异质形核核心；

Mg_3Sb_2 had the same close-packed hexagonal structure as a-Mg , which conformed to the fundamental of heterogeneous nucleation , and was the favorable nucleating center .

密排六方结构晶体SADP标定中的问题及解决途径

Problem in SADP Indexing of H.C.P. Crystal and the Approach to It

双层密排六方结构晶体的结构因子计算

On Structural Factor and Forbidden Reflection Planes in Double Hexagonal-Close-Packed Crystal

钴粉的点阵结构以面心立方为主，仅存在微量的密排六方结构。

The crystal structure of fcc is dominant in cobalt powder , and hcp only a few .

分子在中介相中通常呈现层状相、立方相和六方相。常见金属多晶体材料的晶粒有面心立方、体心立方和密排六方结构。

The common mesophases exhibit lamellar , cubic , and hexagonal molecular packings . Metals often consist of cubic crystals or hexagonal crystals .

然而，镁合金的密排六方结构使其在室温环境下塑性能力差、变形困难，制约了镁合金的进一步应用。

However , the close-packed hexagonal structure of magnesium alloy weakens its plasticity capability and hampers the deformation at ambient temperature that may hinder the further application .

镁合金的密排六方结构使其塑性变形能力较差，限制了它的应用，通过合金化改性可提高变形镁合金的性能。

However , the poor plastic deformability of magnesium alloy due to the hexagonal structure greatly limits its application . The properties of wrought magnesium alloy can be modified by the alloying .

大多数镁合金具有密排六方结构，压力加工成形性能差，而大多数镁合金又具有良好的铸造性能，使得目前镁合金产品以铸件居多。

Most of magnesium alloy has the hexagonal close-packed structure , and formability is not very well , and most of magnesium alloy has the good casting property , so most of magnesium alloy components are mostly produced by die-casting at the present time .

镁合金具有密排六方晶体结构，滑移系少，塑性变形能力差。

Magnesium alloy has hexagonal close-packed ( HCP ) structure , very limted slips and poor plastic deformation ability .

在弹性弯曲过程中，一种变形机制是发生从面心立方到密排六方的晶格结构转变。

In the elastic bending process , crystal lattice can transform from fcc to hcp .

镁具有密排六方的晶体结构，其强度对晶粒尺寸非常敏感，因此制备细晶粒镁合金可以有效改善镁合金的力学性能。

Crystal structure of magnesium is hexagonal close packed ( hcp ), and its strength is very sensitive to grains sizes .

但由于镁合金是密排六方的晶体结构，导致了镁合金的室温塑性很差。

Unfortunately , due to their hexagonal close-packed crystal structure , however , Mg alloys usually present limited workability at room temperature .

但由于其具有密排六方的晶体结构，室温下难以发生塑性变形，高温下又易发生晶粒粗大和表面氧化。

Due to hexagonal crystal structure , magnesium alloys have relatively low plasticity at room temperature while coarse grains and surface oxidation are prone to occur at elevated temperature .

但是，由于镁合金密排六方的晶体结构，常温下塑性变形能力与塑性加工性能差，限制了其应用。

However , because of their hexagonal close-packed ( hcp ) crystal structure , the plastic deformability of magnesium alloys is quite poor at room-temperature , which is an intrinsic drawback to limit their applications .

但是由于其密排六方的晶体结构及较为粗大的晶粒尺寸，导致其塑性成形能力较差，室温条件下很难直接利用锻造等方式进行塑性成形。

However , the plastic forming properties of magnesium alloys is poor at room temperature as the hexagonal close-packed ( HCP ) crystal structure and coarser grains . As a result , the magnesium alloys is difficult to be plastic formed directly with forging forming method .