Nanophase material
Encyclopedia
Nanophase materials are materials that have grain sizes under 100 nanometre
s. They have different mechanical and optical properties compared to the large grained materials of the same chemical composition.
Transparency and different transparent colours can be achieved with nanophase materials by varying the grain size.
Nanometre
A nanometre is a unit of length in the metric system, equal to one billionth of a metre. The name combines the SI prefix nano- with the parent unit name metre .The nanometre is often used to express dimensions on the atomic scale: the diameter...
s. They have different mechanical and optical properties compared to the large grained materials of the same chemical composition.
Transparency and different transparent colours can be achieved with nanophase materials by varying the grain size.
Nanophase materials
- Nanophase metals usually are many times harder but more brittleBrittleA material is brittle if, when subjected to stress, it breaks without significant deformation . Brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound. Brittle materials include most ceramics and glasses ...
than regular metalMetalA metal , is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable and shiny, that is they reflect most of incident light...
s.- nanophase copper is a superhard material
- nanophase aluminum
- nanophase iron is iron with a grain size in the nanometer range. Nanocrystalline iron has a tensile strength of around 6 GPA, twice that of the best maraging steels.http://www.nanosteelco.com/technology/nanoscale_micro_03.html
- Nanophase ceramics usually are more ductile and less brittle than regular ceramicCeramicA ceramic is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous...
s.
External links
- Creating Nanophase Materials. Scientific AmericanScientific AmericanScientific American is a popular science magazine. It is notable for its long history of presenting science monthly to an educated but not necessarily scientific public, through its careful attention to the clarity of its text as well as the quality of its specially commissioned color graphics...
(subscription required) - Nanophase Materials, Michigan Tech
- Research on Nanophase Materials, Louisiana State UniversityLouisiana State UniversityLouisiana State University and Agricultural and Mechanical College, most often referred to as Louisiana State University, or LSU, is a public coeducational university located in Baton Rouge, Louisiana. The University was founded in 1853 in what is now known as Pineville, Louisiana, under the name...