anhedral grain

简明释义

他形晶粒;

英英释义

例句

1.Geologists often study anhedral grains to understand the conditions under which the rock formed.

地质学家常常研究无晶粒以了解岩石形成的条件。

2.The mineral sample was primarily composed of anhedral grains, indicating a lack of crystal growth space.

这个矿物样本主要由无晶粒组成，表明缺乏晶体生长空间。

3.The presence of anhedral grains in the rock suggests rapid cooling after formation.

岩石中存在无晶粒表明形成后快速冷却。

4.The anhedral grain structure of the mineral makes it less desirable for certain industrial applications.

这种矿物的无晶粒结构使其在某些工业应用中不太理想。

5.In petrology, identifying anhedral grains can help classify the type of igneous rock.

在岩石学中，识别无晶粒可以帮助分类火成岩的类型。

作文

The study of materials, particularly in the field of geology and materials science, often reveals fascinating insights into the structure and properties of different substances. One such term that emerges in this context is anhedral grain, which refers to a type of crystal grain that lacks well-defined boundaries and does not exhibit the typical geometric shapes associated with crystalline structures. Understanding anhedral grain is crucial for interpreting the physical characteristics of rocks and minerals, as it can significantly influence their behavior under various conditions.To delve deeper into the concept of anhedral grain, we must first explore its counterpart: euhedral grains. Euhedral grains are crystals that have grown in an environment that allows them to develop their full geometric form, showcasing smooth and distinct faces. In contrast, anhedral grain forms when crystals grow in crowded conditions where they compete for space and resources, leading to irregular shapes. This difference in formation can tell us a lot about the geological history of a rock sample.For instance, when examining igneous rocks, the presence of anhedral grain can indicate rapid cooling processes. In environments where magma cools quickly, such as near the surface, crystals do not have sufficient time to grow into their ideal shapes. As a result, the grains appear more rounded and less defined. This observation can help geologists infer the cooling rates and the conditions under which the rock was formed.Additionally, anhedral grain is often found in metamorphic rocks. During metamorphism, existing minerals can be subjected to high temperatures and pressures, causing them to re-crystallize. The resultant grains may lose their original euhedral shapes, becoming more anhedral due to the intense conditions they experience. This transformation provides valuable information about the metamorphic history of the rock, including the temperature and pressure conditions it underwent.The implications of studying anhedral grain extend beyond geology; they also play a significant role in materials science and engineering. For example, in metallurgy, the properties of metals can be influenced by the size and shape of their grains. Anhedral grains in metal alloys may lead to different mechanical properties compared to those with euhedral grains. Understanding these differences can aid engineers in designing materials with specific characteristics tailored for particular applications.Moreover, in the field of ceramics, the presence of anhedral grain can affect the strength and durability of the final product. By controlling the grain structure during the manufacturing process, ceramic engineers can optimize the performance of their materials, making them suitable for various industrial uses.In conclusion, the term anhedral grain is more than just a technical jargon; it encapsulates essential concepts in both geology and materials science. By examining the formation and characteristics of anhedral grain, scientists and engineers can gain insights into the history and properties of materials. Whether in understanding the geological processes that shape our planet or in developing advanced materials for technological applications, the study of anhedral grain proves to be a vital aspect of scientific inquiry. As we continue to explore the intricacies of materials, the significance of anhedral grain will undoubtedly remain a key focus for researchers and practitioners alike.

对材料的研究，特别是在地质学和材料科学领域，通常揭示出对不同物质的结构和特性的迷人见解。其中一个出现的术语是无定形晶粒，指的是一种缺乏明确边界且不表现出与晶体结构相关的典型几何形状的晶体晶粒。理解无定形晶粒对于解读岩石和矿物的物理特性至关重要，因为它可能会显著影响它们在各种条件下的行为。为了更深入地探讨无定形晶粒的概念，我们必须首先了解其对应物：有定形晶粒。有定形晶粒是指在允许其发展完整几何形状的环境中生长的晶体，展示出光滑和明显的面。相反，无定形晶粒是在拥挤的条件下生长的晶体，在这种情况下，它们竞争空间和资源，导致不规则的形状。这种形成过程的差异可以告诉我们很多关于岩石样本的地质历史。例如，当检查火成岩时，无定形晶粒的存在可以表明快速冷却过程。在岩浆迅速冷却的环境中，例如靠近地表，晶体没有足够的时间成长为理想的形状。因此，晶粒看起来更圆润且不太明确。这一观察结果可以帮助地质学家推断岩石的冷却速率及其形成条件。此外，无定形晶粒通常出现在变质岩中。在变质作用过程中，现有矿物可能会受到高温和高压的影响，导致它们重新结晶。最终生成的晶粒可能失去原来的有定形形状，由于经历的剧烈条件而变得更加无定形。这一转变提供了有关岩石变质历史的宝贵信息，包括其经历的温度和压力条件。研究无定形晶粒的意义超越了地质学；它们在材料科学和工程中也发挥着重要作用。例如，在冶金学中，金属的性能可能会受到其晶粒大小和形状的影响。金属合金中的无定形晶粒可能导致与有定形晶粒不同的机械性能。理解这些差异可以帮助工程师设计具有特定特性的材料，以满足特定应用的需求。此外，在陶瓷领域，无定形晶粒的存在可能会影响最终产品的强度和耐用性。通过控制制造过程中晶粒结构，陶瓷工程师可以优化其材料的性能，使其适用于各种工业用途。总之，术语无定形晶粒不仅仅是技术术语；它包含了地质学和材料科学中的基本概念。通过研究无定形晶粒的形成和特性，科学家和工程师可以洞察材料的历史和特性。无论是在理解塑造我们星球的地质过程，还是在开发适用于技术应用的先进材料，无定形晶粒的研究证明是科学探究的重要方面。随着我们继续探索材料的复杂性，无定形晶粒的重要性无疑将继续成为研究人员和从业者的重点。