grain size

简明释义

粒度

英英释义

例句

1.When making ceramics, controlling the grain size is crucial for durability.

在制作陶瓷时，控制颗粒大小对耐用性至关重要。

2.Researchers found that the grain size of the ice crystals affects their melting rate.

研究人员发现，冰晶的粒度会影响其融化速度。

3.In metallurgy, a smaller grain size can lead to stronger materials.

在冶金学中，较小的晶粒尺寸可以导致材料更强。

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

沙子的粒度会影响其在建筑中的压实程度。

5.The grain size of the coffee beans determines the flavor extraction.

咖啡豆的粒度决定了风味的提取。

作文

The term grain size refers to the size of individual particles in a material, which can significantly influence its properties and behavior. In various fields such as geology, materials science, and engineering, understanding grain size is crucial for predicting how materials will perform under different conditions. For instance, in metallurgy, the grain size of metals can affect their strength, ductility, and toughness. A smaller grain size often leads to stronger and more ductile materials due to the increased number of grain boundaries that impede dislocation movement. Conversely, larger grain sizes may result in materials that are more brittle and less capable of withstanding stress.In geology, the grain size of sedimentary rocks can provide valuable information about the environment in which the sediments were deposited. For example, fine-grained sediments, such as clay, typically indicate low-energy environments like deep ocean floors, while coarse-grained sediments, like sand, suggest higher-energy environments such as riverbeds or beaches. By analyzing the grain size distribution within a rock formation, geologists can infer past geological events and understand the history of the Earth’s surface.Moreover, in the field of ceramics, the grain size is critical in determining the final product's performance. Smaller grain sizes in ceramic materials can enhance their mechanical strength and thermal stability. This is particularly important for applications in aerospace and electronics, where materials must withstand extreme conditions without failure. The control of grain size during the manufacturing process can lead to significant improvements in the durability and reliability of ceramic components.In addition to these practical applications, the study of grain size also has implications for scientific research. Researchers often utilize techniques such as scanning electron microscopy (SEM) and X-ray diffraction to analyze grain sizes in various materials. This analysis not only helps in understanding the fundamental properties of the materials but also aids in the development of new materials with tailored characteristics for specific applications.Furthermore, the relationship between grain size and material properties is often described by the Hall-Petch relationship, which states that smaller grain sizes lead to increased yield strength in polycrystalline materials. This principle is widely utilized in material design and engineering, as it provides a guideline for optimizing the mechanical properties of materials through controlled processing techniques.In conclusion, the concept of grain size is integral to multiple disciplines, influencing everything from the strength of metals to the characteristics of sedimentary rocks. Understanding how grain size affects material behavior is essential for scientists and engineers alike, as it enables them to predict performance, improve material design, and innovate new applications. As technology advances, the ability to manipulate and control grain size will continue to play a pivotal role in the development of advanced materials that meet the demands of modern society.

“grain size”这个术语指的是材料中单个颗粒的大小，这会显著影响其特性和行为。在地质学、材料科学和工程等多个领域，理解grain size对预测材料在不同条件下的表现至关重要。例如，在冶金学中，金属的grain size可以影响其强度、延展性和韧性。较小的grain size通常会导致材料更强且更具延展性，这是由于增加的晶界数量阻碍了位错的运动。相反，较大的grain size可能导致材料更脆弱，无法承受应力。在地质学中，沉积岩的grain size可以提供有关沉积物沉积环境的宝贵信息。例如，细粒沉积物（如粘土）通常表明低能环境，如深海底，而粗粒沉积物（如沙子）则暗示更高能的环境，如河床或海滩。通过分析岩层中的grain size分布，地质学家可以推断过去的地质事件，并理解地球表面的历史。此外，在陶瓷领域，grain size对于确定最终产品的性能至关重要。较小的grain size在陶瓷材料中可以增强其机械强度和热稳定性。这对于航空航天和电子等应用尤为重要，因为这些材料必须在极端条件下保持不变。控制制造过程中grain size的变化可以显著改善陶瓷部件的耐久性和可靠性。除了这些实际应用，grain size的研究还对科学研究有重要意义。研究人员常常利用扫描电子显微镜（SEM）和X射线衍射等技术来分析各种材料的grain size。这种分析不仅有助于理解材料的基本特性，还帮助开发具有特定应用所需特性的新品材料。此外，grain size与材料性能之间的关系通常通过Hall-Petch关系来描述，该关系指出，较小的grain size会导致多晶材料的屈服强度增加。这个原理在材料设计和工程中被广泛应用，因为它为通过控制加工技术优化材料的机械特性提供了指导。总之，grain size的概念在多个学科中都是不可或缺的，它影响从金属的强度到沉积岩的特性等各个方面。理解grain size如何影响材料行为对科学家和工程师来说至关重要，因为这使他们能够预测性能、改善材料设计并创新新应用。随着技术的进步，操控和控制grain size的能力将继续在开发满足现代社会需求的先进材料中发挥关键作用。