Fabrication of Nanophase Materials

摘要: Most crystalline solids are composed of a collection many small crystals or grains, termed polycrystalline. The term nanocrystalline materials (also known as nanostructured nanophase materials) is used to describe that have majority grain diameters in the typical range from ∼1 50 nm. mechanical properties at room temperature always superior (higher strength and toughness) those coarse-grained ones. One very basic results physical chemistry insight most depend on microstructure. size grains (average diameter) polycrystalline material has pronounced effects its properties. A fine-grained material, so-called harder stronger than one coarse-grained, since former greater total boundary area impede dislocation motion. Amongst different options for preparations, alloying method considered powerful tool because simplicity, relatively inexpensive equipment, possibility producing large quantities, which scaled up several tons. Consolidation milled powders an important step reliable reproducible determination physical/mechanical fabricated required industrial applications.