intergranular

Intergranular spaces can be seen in this polished rock sample.

Definition

1. Adjective:
   • Situated between or occurring within the boundaries of grains or crystals: "intergranular" describes something that exists, happens, or is located in the spaces or interfaces between individual grains (such as mineral grains in a rock, metal crystals in an alloy, or particles in a material). It is most commonly used in geology, materials science, and metallurgy.

Usage Examples

• Adjective:
  • The intergranular corrosion weakened the metal structure. (Corrosion occurring at the boundaries between the metal's crystal grains.)
  • Geologists studied the intergranular porosity of the sandstone. (The empty spaces between the sand grains that can hold water or oil.)
  • Intergranular fracture is a common failure mode in certain alloys under stress. (A fracture that travels along the boundaries between grains rather than through the grains themselves.)

Advanced Usage

• "Intergranular corrosion": a type of localized corrosion that attacks the grain boundaries of a metal, often due to impurities or structural changes.

  • Stainless steel can suffer from intergranular corrosion if it is improperly heat-treated. (The metal corrodes along the boundaries of its crystal grains.)

• "Intergranular porosity": the volume of open space between the grains of a sedimentary rock or a powder compact.

  • The reservoir rock's intergranular porosity determines its ability to store oil. (The spaces between grains hold the oil.)

Variants and Related Words

• Grain (n): a small, hard particle or crystal of a substance; in materials, the individual crystal within a polycrystalline solid.
  • The metal's grain size affects its strength. (The size of the individual crystals.)
• Granular (adj): consisting of or resembling small grains.
  • The granular texture of the sugar made it easy to dissolve. (Composed of tiny particles.)
• Intragranular (adj): occurring within a single grain or crystal (the opposite of intergranular).
  • Intragranular defects are found inside the crystal, not at its boundaries. (Within the grain itself.)

Synonyms

• Between grains: describing the location at the boundaries of particles.
• Grain-boundary: a related term meaning exactly at the interface between grains.
  • Grain-boundary diffusion is a key process in sintering. (Diffusion along the interfaces between grains.)

Related Idioms

• "Grain of truth": a small amount of truth in a statement (not directly related to intergranular but sharing the word "grain").
  • There is a grain of truth in his story. (A small part of it is true.)