grain size

简明释义

粒度

英英释义

例句

1.The grain size analysis showed that the rock was formed under high-pressure conditions.

对颗粒大小的分析表明该岩石是在高压条件下形成的。

2.Researchers found that reducing the grain size of the alloy improved its strength.

研究人员发现，减小合金的晶粒大小提高了其强度。

3.In geology, the grain size of sediment can indicate the energy of the environment in which it was deposited.

在地质学中，沉积物的颗粒大小可以指示其沉积环境的能量。

4.The grain size of the sand affects how well it compacts when used in construction.

沙子的颗粒大小会影响其在建筑中压实的效果。

5.The engineers measured the grain size of the metal to ensure it met the required specifications.

工程师测量了金属的晶粒大小以确保其符合所需的规格。

作文

The concept of grain size is crucial in various scientific fields, particularly in materials science and geology. In materials science, grain size refers to the diameter of individual crystals or grains in a solid material. The size of these grains can significantly influence the mechanical properties of the material. For instance, metals with smaller grain sizes tend to exhibit higher strength and hardness due to the grain boundary strengthening mechanism. This phenomenon occurs because smaller grains provide more barriers to dislocation movement, which is a primary mode of deformation in crystalline materials.In geology, grain size is used to describe the size of particles in sedimentary rocks and soils. It plays a vital role in understanding sediment transport, deposition processes, and the overall characteristics of geological formations. For example, coarser sediments like gravel have larger grain sizes and are typically found in environments with strong currents, while finer sediments such as clay have smaller grain sizes and settle in calmer waters.Understanding grain size is also essential in the field of soil science. The grain size distribution in soil affects its porosity, permeability, and water retention capacity. Sandy soils, which have larger grain sizes, tend to drain quickly but retain less moisture, while clayey soils, with their smaller grain sizes, hold water well but may become compacted and poorly drained. This knowledge is crucial for agricultural practices and land management.In addition to its significance in materials science and geology, grain size also has implications in food science. The grain size of ingredients can affect the texture and quality of food products. For example, in baking, the grain size of flour can influence the final texture of bread. Finer flours can create a softer crumb, while coarser flours may lead to a denser product. Understanding how grain size impacts food can help chefs and food scientists create better recipes and improve food quality.Moreover, advancements in technology have enabled researchers to manipulate grain size at the nanoscale, leading to the development of new materials with enhanced properties. Nanomaterials with controlled grain sizes can exhibit unique electrical, thermal, and optical characteristics, making them suitable for applications in electronics, medicine, and energy storage.In conclusion, the term grain size encompasses a wide range of applications across different fields. Whether it relates to the strength of metals, the characteristics of soils, the texture of food, or the development of advanced materials, understanding grain size is essential for scientists and engineers. As research continues to evolve, the manipulation and control of grain size will likely play an increasingly important role in innovation and technology.

“粒度”这一概念在多个科学领域中至关重要，尤其是在材料科学和地质学中。在材料科学中，“粒度”指的是固体材料中单个晶体或颗粒的直径。这些颗粒的大小可以显著影响材料的机械性能。例如，具有较小“粒度”的金属通常表现出更高的强度和硬度，原因在于晶界强化机制。这种现象发生是因为较小的颗粒提供了更多的位错运动障碍，而位错运动是晶体材料变形的主要方式。在地质学中，“粒度”用于描述沉积岩和土壤中颗粒的大小。它在理解沉积物运输、沉积过程以及地质构造的整体特征方面起着至关重要的作用。例如，粗糙的沉积物如砾石具有较大的“粒度”，通常在强流环境中发现，而较细的沉积物如粘土则具有较小的“粒度”，并沉降在较平静的水域。理解“粒度”在土壤科学领域也至关重要。土壤中的“粒度”分布影响其孔隙度、渗透性和保水能力。沙质土壤，具有较大的“粒度”，通常排水迅速，但保留的水分较少，而粘土土壤则由于其较小的“粒度”而能很好地保持水分，但可能会变得紧实且排水不良。这些知识对于农业实践和土地管理至关重要。除了在材料科学和地质学中的重要性外，“粒度”在食品科学中也有影响。成分的“粒度”可以影响食品产品的质地和质量。例如，在烘焙过程中，面粉的“粒度”可以影响面包的最终质地。较细的面粉可以产生更柔软的内部结构，而较粗的面粉可能导致更致密的产品。理解“粒度”对食品的影响可以帮助厨师和食品科学家创造更好的食谱和提高食品质量。此外，技术的进步使研究人员能够在纳米尺度上操控“粒度”，从而开发出具有增强性能的新材料。控制“粒度”的纳米材料可以表现出独特的电学、热学和光学特性，使其适用于电子、医学和能源存储等应用。总之，“粒度”这一术语涵盖了不同领域的广泛应用。无论是与金属的强度、土壤的特性、食品的质地，还是新材料的开发相关，理解“粒度”对科学家和工程师而言都是至关重要的。随着研究的不断发展，对“粒度”的操控和控制在创新和技术中可能会发挥越来越重要的作用。