实体相变过程中的机制-凯发k8官网

实体相变过程中的机制
文章来源:未知 文章作者:enread 发布时间:2014-09-20 07:21 字体: [ ] 
(单词翻译:双击或拖选)
two solids made of the same elements but with different geometric arrangements of the atoms, or crystal phases, can produce materials with different properties. coal and diamond offer a spectacular example of this effect. while it is well known that one crystal phase can transform into another under the right circumstances, the 2 that facilitate solid-to-solid transitions are still not well understood. atoms can rearrange themselves to transform from a "parent" phase into a "daughter" phase by two major routes, but it is difficult to predict which route a material will take or why it took one route 3 the other.
 
to this end, researchers from the hong kong university of science and technology, the university of pennsylvania, soochow university in suzhou, china, and solvay, have studied 4 solid-solid transitions with single-particle resolution, and they have discovered a surprising 1 that facilitates one of these routes. they found that some crystals have an easier time of making the solid-solid transition if they take it in two steps.
 
surprisingly, the first step of the process involves the parent phase producing 5 of liquid. the liquid droplets then evolve into the daughter phase.
 
the observations provide new insight for all sorts of solid-solid phase 6, and have potential implications for development and manufacture of 7, as well as natural processes that occur deep within earth's 8.
 
the research team was led by graduate student yi peng and associate professor of physics yilong han, both of the hong kong university of science and technology, as well as arjun yodh, director of the laboratory for research on the structure of matter and professor in the department of physics and astronomy in penn's school of arts & sciences.
 
it was published in nature materials.


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1 zcwxr     
n.机械装置;机构,结构
参考例句:
  • the bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • the mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
2 d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
参考例句:
  • the research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
  • he explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
3 wi7wu     
prep.以…为对手,对;与…相比之下
参考例句:
  • the big match tonight is england versus spain.今晚的大赛是英格兰对西班牙。
  • the most exciting game was harvard versus yale.最富紧张刺激的球赛是哈佛队对耶鲁队。
4 604feb9aad45eca2ea7010bb729a9f72     
adj. 胶状的, 胶质的
参考例句:
  • colloidal particles are bombarded by molecules of the dispersion medium. 胶粒会受到分散介质分子的碰撞。
  • frictional behavior is modified by colloidal silica or starch deposition. 耐磨损性能可以通过在织物上沉淀胶状硅或淀粉一类物质而得到改善。
5 3c55b5988da2d40be7a87f6b810732d2     
n.小滴( droplet的名词复数 )
参考例句:
  • droplets of sweat were welling up on his forehead. 他额头上冒出了滴滴汗珠。 来自辞典例句
  • in constrast, exhaled smoke contains relatively large water droplets and appears white. 相反,从人嘴里呼出的烟则包含相当大的水滴,所以呈白色。 来自辞典例句
6 dfc3424f78998e0e9ce8980c12f60650     
n.变化( transformation的名词复数 );转换;转换;变换
参考例句:
  • energy transformations go on constantly, all about us. 在我们周围,能量始终在不停地转换着。 来自辞典例句
  • on the average, such transformations balance out. 平均起来,这种转化可以互相抵消。 来自辞典例句
7 a0554febd06fadac0b9b8f0ad597e74d     
n.合金( alloy的名词复数 )
参考例句:
  • this is essentially a development of thoria dispersion strengthened nickel alloys. 这基本上是用二氧化钍弥散强度化的镍基合金。 来自辞典例句
  • the lack of deep hardening in these alloys negates their use. 这些合金缺乏深层硬化能力使它们无法利用。 来自辞典例句
8 y7tzs     
n.斗篷,覆罩之物,罩子;v.罩住,覆盖,脸红
参考例句:
  • the earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
  • the mountain was covered with a mantle of snow.山上覆盖着一层雪。
tag标签: phase process solids
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