crystal boundary

简明释义

晶体间界

英英释义

例句

1.Defects often occur at the crystal boundary, affecting the material's overall strength.

缺陷通常发生在晶体边界，影响材料的整体强度。

2.The researchers studied the effects of temperature on the movement of atoms across the crystal boundary.

研究人员研究了温度对原子在晶体边界上运动的影响。

3.When two different materials meet, the properties at the crystal boundary can change significantly.

当两种不同材料相遇时，晶体边界处的性质可能会显著改变。

4.In semiconductor manufacturing, the quality of the crystal boundary is crucial for device performance.

在半导体制造中，晶体边界的质量对器件性能至关重要。

5.The crystal boundary acts as a barrier to dislocation motion in metals.

晶体边界在金属中作为位错运动的障碍。

作文

The study of materials often leads us to explore their microscopic structures, which are crucial for understanding their macroscopic properties. One of the most significant aspects of these structures is the concept of the crystal boundary. A crystal boundary (晶界) refers to the interface that separates two different crystal grains within a material. These boundaries play an essential role in determining the mechanical, electrical, and thermal properties of crystalline materials. When we examine metals, for instance, the arrangement of atoms in a crystal lattice can significantly influence how the metal behaves under stress. The presence of a crystal boundary can impede the movement of dislocations, which are defects in the crystal structure that allow deformation to occur. This phenomenon is crucial in materials science, as it helps explain why some metals are more ductile than others. In addition to mechanical properties, crystal boundaries also affect the electrical conductivity of materials. In semiconductors, the junctions formed by crystal boundaries can create energy barriers that influence charge carrier mobility. This is particularly important in the design of electronic devices, where the efficiency of the material can greatly impact the overall performance. Moreover, the characteristics of crystal boundaries can vary depending on factors such as temperature and the rate of cooling during solidification. For example, rapid cooling may result in finer grains and a higher density of crystal boundaries, which can enhance certain properties like strength but may reduce others like toughness. Conversely, slow cooling tends to promote larger grains and fewer crystal boundaries, leading to increased ductility. Research into crystal boundaries has also opened new avenues in nanotechnology. As materials are reduced to the nanoscale, the proportion of crystal boundaries increases, which can lead to unique behaviors not observed in bulk materials. Understanding how these boundaries function at such small scales is vital for the development of advanced materials with tailored properties for specific applications. In conclusion, the crystal boundary (晶界) is a critical feature in the study of crystalline materials. It influences a wide range of properties, from mechanical strength to electrical conductivity, and plays a pivotal role in the behavior of materials under various conditions. As research continues to advance, a deeper understanding of crystal boundaries will undoubtedly lead to innovations across multiple fields, including materials science, nanotechnology, and engineering.