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polycrystal
This term is primarily used in materials science, crystallography, and metallurgy to describe the internal structure of solids. It describes a material that is not a single, continuous crystal lattice but is instead composed of many smaller crystalline grains. These grains are typically separated by grain boundaries, which significantly influence the physical and mechanical properties of the material.
In a technical context, the term is often contrasted with single-crystal materials. While a single crystal has a uniform orientation throughout, a polycrystal consists of grains with random orientations, making the material isotropic on a macroscopic scale despite being anisotropic at the microscopic level.
Meanings
Examples
Most metals are essentially a polycrystal consisting of many small grains.
Most metals are essentially a polycrystal consisting of many small grains.
Is this sample a single crystal or a polycrystal?
The material behaves as a polycrystal due to the random orientation of its crystallites.
I wonder if the polycrystal structure will affect the electrical conductivity.
I wonder if the polycrystal structure will affect the electrical conductivity.
The researcher analyzed the polycrystal using X-ray diffraction.
The researcher analyzed the polycrystal using X-ray diffraction.
A polycrystal typically exhibits isotropic properties on a macroscopic scale.
A polycrystal typically exhibits isotropic properties on a macroscopic scale.
We need to determine the grain size of this polycrystal.
The ceramic was synthesized as a dense polycrystal.